On Tue, Mar 31, 2020 at 07:59:59PM +0200, Eugenio Pérez wrote: > Signed-off-by: Eugenio Pérez <eperezma@xxxxxxxxxx> > --- > drivers/vhost/net.c | 28 +++++++++++++++------------- > drivers/vhost/vhost.h | 28 ++++++++++++++++++++++++++++ > drivers/vhost/vsock.c | 14 +++++++------- > 3 files changed, 50 insertions(+), 20 deletions(-) > > diff --git a/drivers/vhost/net.c b/drivers/vhost/net.c > index e158159671fa..6c5e7a6f712c 100644 > --- a/drivers/vhost/net.c > +++ b/drivers/vhost/net.c > @@ -424,7 +424,7 @@ static void vhost_net_disable_vq(struct vhost_net *n, > struct vhost_net_virtqueue *nvq = > container_of(vq, struct vhost_net_virtqueue, vq); > struct vhost_poll *poll = n->poll + (nvq - n->vqs); > - if (!vq->private_data) > + if (!vhost_vq_get_backend_opaque(vq)) > return; > vhost_poll_stop(poll); > } > @@ -437,7 +437,7 @@ static int vhost_net_enable_vq(struct vhost_net *n, > struct vhost_poll *poll = n->poll + (nvq - n->vqs); > struct socket *sock; > > - sock = vq->private_data; > + sock = vhost_vq_get_backend_opaque(vq); > if (!sock) > return 0; > > @@ -524,7 +524,7 @@ static void vhost_net_busy_poll(struct vhost_net *net, > return; > > vhost_disable_notify(&net->dev, vq); > - sock = rvq->private_data; > + sock = vhost_vq_get_backend_opaque(rvq); > > busyloop_timeout = poll_rx ? rvq->busyloop_timeout: > tvq->busyloop_timeout; > @@ -570,8 +570,10 @@ static int vhost_net_tx_get_vq_desc(struct vhost_net *net, > > if (r == tvq->num && tvq->busyloop_timeout) { > /* Flush batched packets first */ > - if (!vhost_sock_zcopy(tvq->private_data)) > - vhost_tx_batch(net, tnvq, tvq->private_data, msghdr); > + if (!vhost_sock_zcopy(vhost_vq_get_backend_opaque(tvq))) > + vhost_tx_batch(net, tnvq, > + vhost_vq_get_backend_opaque(tvq), > + msghdr); > > vhost_net_busy_poll(net, rvq, tvq, busyloop_intr, false); > > @@ -685,7 +687,7 @@ static int vhost_net_build_xdp(struct vhost_net_virtqueue *nvq, > struct vhost_virtqueue *vq = &nvq->vq; > struct vhost_net *net = container_of(vq->dev, struct vhost_net, > dev); > - struct socket *sock = vq->private_data; > + struct socket *sock = vhost_vq_get_backend_opaque(vq); > struct page_frag *alloc_frag = &net->page_frag; > struct virtio_net_hdr *gso; > struct xdp_buff *xdp = &nvq->xdp[nvq->batched_xdp]; > @@ -952,7 +954,7 @@ static void handle_tx(struct vhost_net *net) > struct socket *sock; > > mutex_lock_nested(&vq->mutex, VHOST_NET_VQ_TX); > - sock = vq->private_data; > + sock = vhost_vq_get_backend_opaque(vq); > if (!sock) > goto out; > > @@ -1121,7 +1123,7 @@ static void handle_rx(struct vhost_net *net) > int recv_pkts = 0; > > mutex_lock_nested(&vq->mutex, VHOST_NET_VQ_RX); > - sock = vq->private_data; > + sock = vhost_vq_get_backend_opaque(vq); > if (!sock) > goto out; > > @@ -1344,9 +1346,9 @@ static struct socket *vhost_net_stop_vq(struct vhost_net *n, > container_of(vq, struct vhost_net_virtqueue, vq); > > mutex_lock(&vq->mutex); > - sock = vq->private_data; > + sock = vhost_vq_get_backend_opaque(vq); > vhost_net_disable_vq(n, vq); > - vq->private_data = NULL; > + vhost_vq_set_backend_opaque(vq, NULL); > vhost_net_buf_unproduce(nvq); > nvq->rx_ring = NULL; > mutex_unlock(&vq->mutex); > @@ -1528,7 +1530,7 @@ static long vhost_net_set_backend(struct vhost_net *n, unsigned index, int fd) > } > > /* start polling new socket */ > - oldsock = vq->private_data; > + oldsock = vhost_vq_get_backend_opaque(vq); > if (sock != oldsock) { > ubufs = vhost_net_ubuf_alloc(vq, > sock && vhost_sock_zcopy(sock)); > @@ -1538,7 +1540,7 @@ static long vhost_net_set_backend(struct vhost_net *n, unsigned index, int fd) > } > > vhost_net_disable_vq(n, vq); > - vq->private_data = sock; > + vhost_vq_set_backend_opaque(vq, sock); > vhost_net_buf_unproduce(nvq); > r = vhost_vq_init_access(vq); > if (r) > @@ -1575,7 +1577,7 @@ static long vhost_net_set_backend(struct vhost_net *n, unsigned index, int fd) > return 0; > > err_used: > - vq->private_data = oldsock; > + vhost_vq_set_backend_opaque(vq, oldsock); > vhost_net_enable_vq(n, vq); > if (ubufs) > vhost_net_ubuf_put_wait_and_free(ubufs); > diff --git a/drivers/vhost/vhost.h b/drivers/vhost/vhost.h > index a123fd70847e..0808188f7e8f 100644 > --- a/drivers/vhost/vhost.h > +++ b/drivers/vhost/vhost.h > @@ -244,6 +244,34 @@ enum { > (1ULL << VIRTIO_F_VERSION_1) > }; > > +/** > + * vhost_vq_set_backend_opaque - Set backend opaque. > + * > + * @vq Virtqueue. > + * @private_data The private data. > + * > + * Context: Need to call with vq->mutex acquired. > + */ > +static inline void vhost_vq_set_backend_opaque(struct vhost_virtqueue *vq, > + void *private_data) > +{ > + vq->private_data = private_data; > +} > + > +/** > + * vhost_vq_get_backend_opaque - Get backend opaque. > + * > + * @vq Virtqueue. > + * @private_data The private data. > + * > + * Context: Need to call with vq->mutex acquired. > + * Return: Opaque previously set with vhost_vq_set_backend_opaque. > + */ > +static inline void *vhost_vq_get_backend_opaque(struct vhost_virtqueue *vq) > +{ > + return vq->private_data; > +} > + > static inline bool vhost_has_feature(struct vhost_virtqueue *vq, int bit) > { > return vq->acked_features & (1ULL << bit); I think I prefer vhost_vq_get_backend and vhost_vq_set_backend. "opaque" just means that it's void * that is clear from the signature anyway. > diff --git a/drivers/vhost/vsock.c b/drivers/vhost/vsock.c > index c2d7d57e98cf..6e20dbe14acd 100644 > --- a/drivers/vhost/vsock.c > +++ b/drivers/vhost/vsock.c > @@ -91,7 +91,7 @@ vhost_transport_do_send_pkt(struct vhost_vsock *vsock, > > mutex_lock(&vq->mutex); > > - if (!vq->private_data) > + if (!vhost_vq_get_backend_opaque(vq)) > goto out; > > /* Avoid further vmexits, we're already processing the virtqueue */ > @@ -440,7 +440,7 @@ static void vhost_vsock_handle_tx_kick(struct vhost_work *work) > > mutex_lock(&vq->mutex); > > - if (!vq->private_data) > + if (!vhost_vq_get_backend_opaque(vq)) > goto out; > > vhost_disable_notify(&vsock->dev, vq); > @@ -533,8 +533,8 @@ static int vhost_vsock_start(struct vhost_vsock *vsock) > goto err_vq; > } > > - if (!vq->private_data) { > - vq->private_data = vsock; > + if (!vhost_vq_get_backend_opaque(vq)) { > + vhost_vq_set_backend_opaque(vq, vsock); > ret = vhost_vq_init_access(vq); > if (ret) > goto err_vq; > @@ -547,14 +547,14 @@ static int vhost_vsock_start(struct vhost_vsock *vsock) > return 0; > > err_vq: > - vq->private_data = NULL; > + vhost_vq_set_backend_opaque(vq, NULL); > mutex_unlock(&vq->mutex); > > for (i = 0; i < ARRAY_SIZE(vsock->vqs); i++) { > vq = &vsock->vqs[i]; > > mutex_lock(&vq->mutex); > - vq->private_data = NULL; > + vhost_vq_set_backend_opaque(vq, NULL); > mutex_unlock(&vq->mutex); > } > err: > @@ -577,7 +577,7 @@ static int vhost_vsock_stop(struct vhost_vsock *vsock) > struct vhost_virtqueue *vq = &vsock->vqs[i]; > > mutex_lock(&vq->mutex); > - vq->private_data = NULL; > + vhost_vq_set_backend_opaque(vq, NULL); > mutex_unlock(&vq->mutex); > } > > -- > 2.18.1