Re: [PATCH] vhost: Remove unused vhost_dev_{load|save}_inflight

[Igor Mammedov <imammedo@redhat.com>]

On Wed, 18 Sep 2024 13:10:34 +0100
dave@treblig.org wrote:

> From: "Dr. David Alan Gilbert" <dave@treblig.org>
> 
> vhost_dev_load_inflight and vhost_dev_save_inflight have been
> unused since they were added in 2019 by:
> 
> 5ad204bf2a ("vhost-user: Support transferring inflight buffer between qemu and backend")
> 
> Remove them, and their helper vhost_dev_resize_inflight.
> 
> Signed-off-by: Dr. David Alan Gilbert <dave@treblig.org>

Reviewed-by: Igor Mammedov <imammedo@redhat.com>

> ---
>  hw/virtio/vhost.c         | 56 ---------------------------------------
>  include/hw/virtio/vhost.h |  2 --
>  2 files changed, 58 deletions(-)
> 
> diff --git a/hw/virtio/vhost.c b/hw/virtio/vhost.c
> index 7c5ef81b55..76f9b2aaad 100644
> --- a/hw/virtio/vhost.c
> +++ b/hw/virtio/vhost.c
> @@ -1930,62 +1930,6 @@ void vhost_dev_free_inflight(struct vhost_inflight *inflight)
>      }
>  }
>  
> -static int vhost_dev_resize_inflight(struct vhost_inflight *inflight,
> -                                     uint64_t new_size)
> -{
> -    Error *err = NULL;
> -    int fd = -1;
> -    void *addr = qemu_memfd_alloc("vhost-inflight", new_size,
> -                                  F_SEAL_GROW | F_SEAL_SHRINK | F_SEAL_SEAL,
> -                                  &fd, &err);
> -
> -    if (err) {
> -        error_report_err(err);
> -        return -ENOMEM;
> -    }
> -
> -    vhost_dev_free_inflight(inflight);
> -    inflight->offset = 0;
> -    inflight->addr = addr;
> -    inflight->fd = fd;
> -    inflight->size = new_size;
> -
> -    return 0;
> -}
> -
> -void vhost_dev_save_inflight(struct vhost_inflight *inflight, QEMUFile *f)
> -{
> -    if (inflight->addr) {
> -        qemu_put_be64(f, inflight->size);
> -        qemu_put_be16(f, inflight->queue_size);
> -        qemu_put_buffer(f, inflight->addr, inflight->size);
> -    } else {
> -        qemu_put_be64(f, 0);
> -    }
> -}
> -
> -int vhost_dev_load_inflight(struct vhost_inflight *inflight, QEMUFile *f)
> -{
> -    uint64_t size;
> -
> -    size = qemu_get_be64(f);
> -    if (!size) {
> -        return 0;
> -    }
> -
> -    if (inflight->size != size) {
> -        int ret = vhost_dev_resize_inflight(inflight, size);
> -        if (ret < 0) {
> -            return ret;
> -        }
> -    }
> -    inflight->queue_size = qemu_get_be16(f);
> -
> -    qemu_get_buffer(f, inflight->addr, size);
> -
> -    return 0;
> -}
> -
>  int vhost_dev_prepare_inflight(struct vhost_dev *hdev, VirtIODevice *vdev)
>  {
>      int r;
> diff --git a/include/hw/virtio/vhost.h b/include/hw/virtio/vhost.h
> index c75be46c06..461c168c37 100644
> --- a/include/hw/virtio/vhost.h
> +++ b/include/hw/virtio/vhost.h
> @@ -338,8 +338,6 @@ void vhost_virtqueue_stop(struct vhost_dev *dev, struct VirtIODevice *vdev,
>  
>  void vhost_dev_reset_inflight(struct vhost_inflight *inflight);
>  void vhost_dev_free_inflight(struct vhost_inflight *inflight);
> -void vhost_dev_save_inflight(struct vhost_inflight *inflight, QEMUFile *f);
> -int vhost_dev_load_inflight(struct vhost_inflight *inflight, QEMUFile *f);
>  int vhost_dev_prepare_inflight(struct vhost_dev *hdev, VirtIODevice *vdev);
>  int vhost_dev_set_inflight(struct vhost_dev *dev,
>                             struct vhost_inflight *inflight);