[v6,13/18] block/sheepdog: drop have_co_req() and aio_flush_request()

.io_flush() is no longer called so drop have_co_req() and
aio_flush_request().

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
---
 block/sheepdog.c | 25 +++++--------------------
 1 file changed, 5 insertions(+), 20 deletions(-)

At Thu, 25 Jul 2013 17:18:20 +0200,
Stefan Hajnoczi wrote:
> 
> .io_flush() is no longer called so drop have_co_req() and
> aio_flush_request().
> 
> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
> ---
>  block/sheepdog.c | 25 +++++--------------------
>  1 file changed, 5 insertions(+), 20 deletions(-)

Reviewed-by: MORITA Kazutaka <morita.kazutaka@lab.ntt.co.jp>

Reviewed-by: Wenchao Xia <xiawenc@linux.vnet.ibm.com>

> .io_flush() is no longer called so drop have_co_req() and
> aio_flush_request().
> 
> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
> ---
>   block/sheepdog.c | 25 +++++--------------------
>   1 file changed, 5 insertions(+), 20 deletions(-)
> 
> diff --git a/block/sheepdog.c b/block/sheepdog.c
> index 6a41ad9..e216047 100644
> --- a/block/sheepdog.c
> +++ b/block/sheepdog.c
> @@ -509,13 +509,6 @@ static void restart_co_req(void *opaque)
>       qemu_coroutine_enter(co, NULL);
>   }
> 
> -static int have_co_req(void *opaque)
> -{
> -    /* this handler is set only when there is a pending request, so
> -     * always returns 1. */
> -    return 1;
> -}
> -
>   typedef struct SheepdogReqCo {
>       int sockfd;
>       SheepdogReq *hdr;
> @@ -538,14 +531,14 @@ static coroutine_fn void do_co_req(void *opaque)
>       unsigned int *rlen = srco->rlen;
> 
>       co = qemu_coroutine_self();
> -    qemu_aio_set_fd_handler(sockfd, NULL, restart_co_req, have_co_req, co);
> +    qemu_aio_set_fd_handler(sockfd, NULL, restart_co_req, NULL, co);
> 
>       ret = send_co_req(sockfd, hdr, data, wlen);
>       if (ret < 0) {
>           goto out;
>       }
> 
> -    qemu_aio_set_fd_handler(sockfd, restart_co_req, NULL, have_co_req, co);
> +    qemu_aio_set_fd_handler(sockfd, restart_co_req, NULL, NULL, co);
> 
>       ret = qemu_co_recv(sockfd, hdr, sizeof(*hdr));
>       if (ret < sizeof(*hdr)) {
> @@ -796,14 +789,6 @@ static void co_write_request(void *opaque)
>       qemu_coroutine_enter(s->co_send, NULL);
>   }
> 
> -static int aio_flush_request(void *opaque)
> -{
> -    BDRVSheepdogState *s = opaque;
> -
> -    return !QLIST_EMPTY(&s->inflight_aio_head) ||
> -        !QLIST_EMPTY(&s->pending_aio_head);
> -}
> -
>   /*
>    * Return a socket discriptor to read/write objects.
>    *
> @@ -819,7 +804,7 @@ static int get_sheep_fd(BDRVSheepdogState *s)
>           return fd;
>       }
> 
> -    qemu_aio_set_fd_handler(fd, co_read_response, NULL, aio_flush_request, s);
> +    qemu_aio_set_fd_handler(fd, co_read_response, NULL, NULL, s);
>       return fd;
>   }
> 
> @@ -1070,7 +1055,7 @@ static int coroutine_fn add_aio_request(BDRVSheepdogState *s, AIOReq *aio_req,
>       qemu_co_mutex_lock(&s->lock);
>       s->co_send = qemu_coroutine_self();
>       qemu_aio_set_fd_handler(s->fd, co_read_response, co_write_request,
> -                            aio_flush_request, s);
> +                            NULL, s);
>       socket_set_cork(s->fd, 1);
> 
>       /* send a header */
> @@ -1092,7 +1077,7 @@ static int coroutine_fn add_aio_request(BDRVSheepdogState *s, AIOReq *aio_req,
> 
>       socket_set_cork(s->fd, 0);
>       qemu_aio_set_fd_handler(s->fd, co_read_response, NULL,
> -                            aio_flush_request, s);
> +                            NULL, s);
>       qemu_co_mutex_unlock(&s->lock);
> 
>       return 0;
>