Am 16.01.2020 um 10:45 hat Markus Armbruster geschrieben:
> Kevin Wolf <kw...@redhat.com> writes:
> > block_resize is safe to run in a coroutine, so use it as an example for
> > the new 'coroutine': true annotation in the QAPI schema.
> >
> > Signed-off-by: Kevin Wolf <kw...@redhat.com>
> > Reviewed-by: Marc-André Lureau <marcandre.lur...@redhat.com>
> > diff --git a/blockdev.c b/blockdev.c
> > index 8e029e9c01..b5e5d1e072 100644
> > --- a/blockdev.c
> > +++ b/blockdev.c
> > @@ -3161,9 +3161,9 @@ void hmp_drive_del(Monitor *mon, const QDict *qdict)
> > aio_context_release(aio_context);
> > }
> >
> > -void qmp_block_resize(bool has_device, const char *device,
> > - bool has_node_name, const char *node_name,
> > - int64_t size, Error **errp)
> > +void coroutine_fn qmp_block_resize(bool has_device, const char *device,
> > + bool has_node_name, const char
> > *node_name,
> > + int64_t size, Error **errp)
> > {
> > Error *local_err = NULL;
> > BlockBackend *blk = NULL;
>
> Pardon my ignorant question: what exactly makes a function a
> coroutine_fn?
When Stefan requested adding the coroutine_fn marker, it seemed to make
sense to me because the QMP dispatcher will always call it from
coroutine context now, and being always run in coroutine context makes a
function a coroutine_fn.
However, it's also called from hmp_block_resize(), so at least for now
coroutine_fn is actually wrong.
Kevin
