On 2019/10/29 下午6:17, Tiwei Bie wrote: > This patch adds the network control vq support in vhost-mdev. > A vhost-mdev specific op is introduced to allow parent drivers > to handle the network control commands come from userspace. Probably work for userspace driver but not kernel driver. > > Signed-off-by: Tiwei Bie <tiwei.bie@xxxxxxxxx> > --- > This patch depends on below patch: > https://lkml.org/lkml/2019/10/29/335 > > drivers/vhost/mdev.c | 37 ++++++++++++++++++++++++++++++-- > include/linux/virtio_mdev_ops.h | 10 +++++++++ > include/uapi/linux/vhost.h | 7 ++++++ > include/uapi/linux/vhost_types.h | 6 ++++++ > 4 files changed, 58 insertions(+), 2 deletions(-) > > diff --git a/drivers/vhost/mdev.c b/drivers/vhost/mdev.c > index 35b2fb33e686..c9b3eaa77405 100644 > --- a/drivers/vhost/mdev.c > +++ b/drivers/vhost/mdev.c > @@ -47,6 +47,13 @@ enum { > (1ULL << VIRTIO_NET_F_HOST_UFO) | > (1ULL << VIRTIO_NET_F_MRG_RXBUF) | > (1ULL << VIRTIO_NET_F_STATUS) | > + (1ULL << VIRTIO_NET_F_CTRL_GUEST_OFFLOADS) | > + (1ULL << VIRTIO_NET_F_CTRL_VQ) | > + (1ULL << VIRTIO_NET_F_CTRL_RX) | > + (1ULL << VIRTIO_NET_F_CTRL_VLAN) | > + (1ULL << VIRTIO_NET_F_CTRL_RX_EXTRA) | > + (1ULL << VIRTIO_NET_F_GUEST_ANNOUNCE) | > + (1ULL << VIRTIO_NET_F_CTRL_MAC_ADDR) | > (1ULL << VIRTIO_NET_F_SPEED_DUPLEX), > }; > > @@ -362,6 +369,29 @@ static long vhost_mdev_vring_ioctl(struct vhost_mdev *m, unsigned int cmd, > return r; > } > > +/* > + * Device specific (e.g. network) ioctls. > + */ > +static long vhost_mdev_dev_ioctl(struct vhost_mdev *m, unsigned int cmd, > + void __user *argp) > +{ > + struct mdev_device *mdev = m->mdev; > + const struct virtio_mdev_device_ops *ops = mdev_get_vhost_ops(mdev); > + > + switch (m->virtio_id) { > + case VIRTIO_ID_NET: > + switch (cmd) { > + case VHOST_MDEV_NET_CTRL: > + if (!ops->net.ctrl) > + return -ENOTSUPP; > + return ops->net.ctrl(mdev, argp); > + } > + break; > + } > + > + return -ENOIOCTLCMD; > +} As you comment above, then vhost-mdev need device specific stuffs. > + > static int vhost_mdev_open(void *device_data) > { > struct vhost_mdev *m = device_data; > @@ -460,8 +490,11 @@ static long vhost_mdev_unlocked_ioctl(void *device_data, > * VHOST_SET_LOG_FD are not used yet. > */ > r = vhost_dev_ioctl(&m->dev, cmd, argp); > - if (r == -ENOIOCTLCMD) > - r = vhost_mdev_vring_ioctl(m, cmd, argp); > + if (r == -ENOIOCTLCMD) { > + r = vhost_mdev_dev_ioctl(m, cmd, argp); > + if (r == -ENOIOCTLCMD) > + r = vhost_mdev_vring_ioctl(m, cmd, argp); > + } > } > > mutex_unlock(&m->mutex); > diff --git a/include/linux/virtio_mdev_ops.h b/include/linux/virtio_mdev_ops.h > index d417b41f2845..622861804ebd 100644 > --- a/include/linux/virtio_mdev_ops.h > +++ b/include/linux/virtio_mdev_ops.h > @@ -20,6 +20,8 @@ struct virtio_mdev_callback { > void *private; > }; > > +struct vhost_mdev_net_ctrl; > + > /** > * struct vfio_mdev_device_ops - Structure to be registered for each > * mdev device to register the device for virtio/vhost drivers. > @@ -151,6 +153,14 @@ struct virtio_mdev_device_ops { > > /* Mdev device ops */ > u64 (*get_mdev_features)(struct mdev_device *mdev); > + > + /* Vhost-mdev (MDEV_CLASS_ID_VHOST) specific ops */ > + union { > + struct { > + int (*ctrl)(struct mdev_device *mdev, > + struct vhost_mdev_net_ctrl __user *ctrl); > + } net; > + }; And so did device_ops. I still think we'd try out best to avoid such thing. Thanks > }; > > void mdev_set_virtio_ops(struct mdev_device *mdev, > diff --git a/include/uapi/linux/vhost.h b/include/uapi/linux/vhost.h > index 061a2824a1b3..3693b2cba0c4 100644 > --- a/include/uapi/linux/vhost.h > +++ b/include/uapi/linux/vhost.h > @@ -134,4 +134,11 @@ > /* Get the max ring size. */ > #define VHOST_MDEV_GET_VRING_NUM _IOR(VHOST_VIRTIO, 0x76, __u16) > > +/* VHOST_MDEV device specific defines */ > + > +/* Send virtio-net commands. The commands follow the same definition > + * of the virtio-net commands defined in virtio-spec. > + */ > +#define VHOST_MDEV_NET_CTRL _IOW(VHOST_VIRTIO, 0x77, struct vhost_mdev_net_ctrl *) > + > #endif > diff --git a/include/uapi/linux/vhost_types.h b/include/uapi/linux/vhost_types.h > index 7b105d0b2fb9..e76b4d8e35e5 100644 > --- a/include/uapi/linux/vhost_types.h > +++ b/include/uapi/linux/vhost_types.h > @@ -127,6 +127,12 @@ struct vhost_mdev_config { > __u8 buf[0]; > }; > > +struct vhost_mdev_net_ctrl { > + __u8 class; > + __u8 cmd; > + __u8 cmd_data[0]; > +} __attribute__((packed)); > + > /* Feature bits */ > /* Log all write descriptors. Can be changed while device is active. */ > #define VHOST_F_LOG_ALL 26 _______________________________________________ Virtualization mailing list Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linuxfoundation.org/mailman/listinfo/virtualization
