On Tue, Jan 29, 2019 at 02:52:36PM +0200, Yuri Benditovich wrote: > VIRTIO_NET_F_RSC_EXT feature bit indicates that the device > is able to provide extended RSC information. When the feature > is active and 'gso_type' field in received packet is not GSO_NONE, > the device reports number of coalesced packets in 'csum_start' > field and number of duplicated acks in 'csum_offset' field > and sets VIRTIO_NET_HDR_F_RSC_INFO in 'flags' field. > > Signed-off-by: Yuri Benditovich <[email protected]> > --- > include/uapi/linux/virtio_net.h | 15 ++++++++++++++- > 1 file changed, 14 insertions(+), 1 deletion(-) > > diff --git a/include/uapi/linux/virtio_net.h b/include/uapi/linux/virtio_net.h > index a3715a3224c1..93c71d714475 100644 > --- a/include/uapi/linux/virtio_net.h > +++ b/include/uapi/linux/virtio_net.h > @@ -56,7 +56,7 @@ > #define VIRTIO_NET_F_MQ 22 /* Device supports Receive Flow > * Steering */ > #define VIRTIO_NET_F_CTRL_MAC_ADDR 23 /* Set MAC address */ > - > +#define VIRTIO_NET_F_RSC_EXT 61 /* Provides extended RSC info */ > #define VIRTIO_NET_F_STANDBY 62 /* Act as standby for another device > * with the same MAC. > */ > @@ -104,6 +104,7 @@ struct virtio_net_config { > struct virtio_net_hdr_v1 { > #define VIRTIO_NET_HDR_F_NEEDS_CSUM 1 /* Use csum_start, csum_offset > */ > #define VIRTIO_NET_HDR_F_DATA_VALID 2 /* Csum is valid */ > +#define VIRTIO_NET_HDR_F_RSC_INFO 4 /* rsc_ext data in csum_ fields */ > __u8 flags; > #define VIRTIO_NET_HDR_GSO_NONE 0 /* Not a GSO frame */ > #define VIRTIO_NET_HDR_GSO_TCPV4 1 /* GSO frame, IPv4 TCP (TSO) */ > @@ -140,6 +141,18 @@ struct virtio_net_hdr_mrg_rxbuf { > struct virtio_net_hdr hdr; > __virtio16 num_buffers; /* Number of merged rx buffers */ > }; > + > +static inline __virtio16 *virtio_net_rsc_ext_num_packets( > + struct virtio_net_hdr *hdr) > +{ > + return &hdr->csum_start; > +} > + > +static inline __virtio16 *virtio_net_rsc_ext_num_dupacks( > + struct virtio_net_hdr *hdr) > +{ > + return &hdr->csum_offset; > +} > #endif /* ...VIRTIO_NET_NO_LEGACY */
Coding style is off here. But really I don't think these inlines are needed here. Put them in qemu or something. > /* > -- > 2.17.1
