From: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> To: "Michael S. Tsirkin" <mst@redhat.com> Cc: Vladislav Yasevich <vyasevich@gmail.com>, netdev@vger.kernel.org, linux-sctp@vger.kernel.org, virtualization@lists.linux-foundation.org, virtio-dev@lists.oasis-open.org, jasowang@redhat.com, nhorman@tuxdriver.com, Vladislav Yasevich <vyasevic@redhat.com> Subject: Re: [PATCH V2 net-next 1/6] virtio: Add support for SCTP checksum offloading Date: Wed, 2 May 2018 11:14:13 -0300 [thread overview] Message-ID: <20180502141413.GD5105@localhost.localdomain> (raw) In-Reply-To: <20180502061520-mutt-send-email-mst@kernel.org> On Wed, May 02, 2018 at 06:16:45AM +0300, Michael S. Tsirkin wrote: > On Tue, May 01, 2018 at 10:07:34PM -0400, Vladislav Yasevich wrote: > > To support SCTP checksum offloading, we need to add a new feature > > to virtio_net, so we can negotiate support between the hypervisor > > and the guest. > > The HOST feature bit signifies offloading support for transmit and > > enables device offload features. > > The GUEST feature bit signifies offloading support of recieve and > > is currently only used by the driver in case of xdp. > > > > That patch also adds an addition virtio_net header flag which > > mirrors the skb->csum_not_inet flag. This flags is used to indicate > > that is this an SCTP packet that needs its checksum computed by the > > lower layer. In this case, the lower layer is the host hypervisor or > > possibly HW nic that supporst CRC32c offload. > > > > In the case that GUEST feature bit is flag, it will be possible to > > receive a virtio_net header with this bit set, which will set the > > corresponding skb bit. SCTP protocol will be updated to correctly > > deal with it. > > > > Signed-off-by: Vladislav Yasevich <vyasevic@redhat.com> > > --- > > drivers/net/virtio_net.c | 14 +++++++++++++- > > include/linux/virtio_net.h | 6 ++++++ > > include/uapi/linux/virtio_net.h | 5 +++++ > > 3 files changed, 24 insertions(+), 1 deletion(-) > > > > diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c > > index 7b187ec..34af280 100644 > > --- a/drivers/net/virtio_net.c > > +++ b/drivers/net/virtio_net.c > > @@ -2148,6 +2148,8 @@ static int virtnet_clear_guest_offloads(struct virtnet_info *vi) > > > > if (virtio_has_feature(vi->vdev, VIRTIO_NET_F_GUEST_CSUM)) > > offloads = 1ULL << VIRTIO_NET_F_GUEST_CSUM; > > + if (virtio_has_feature(vi->vdev, VIRTIO_NET_F_GUEST_SCTP_CSUM)) > > + offloads |= 1ULL << VIRTIO_NET_F_GUEST_SCTP_CSUM; > > > > return virtnet_set_guest_offloads(vi, offloads); > > } > > @@ -2160,6 +2162,8 @@ static int virtnet_restore_guest_offloads(struct virtnet_info *vi) > > return 0; > > if (virtio_has_feature(vi->vdev, VIRTIO_NET_F_GUEST_CSUM)) > > offloads |= 1ULL << VIRTIO_NET_F_GUEST_CSUM; > > + if (virtio_has_feature(vi->vdev, VIRTIO_NET_F_GUEST_SCTP_CSUM)) > > + offloads |= 1ULL << VIRTIO_NET_F_GUEST_SCTP_CSUM; > > > > return virtnet_set_guest_offloads(vi, offloads); > > } > > @@ -2724,6 +2728,7 @@ static int virtnet_probe(struct virtio_device *vdev) > > /* Do we support "hardware" checksums? */ > > if (virtio_has_feature(vdev, VIRTIO_NET_F_CSUM)) { > > /* This opens up the world of extra features. */ > > + > > dev->hw_features |= NETIF_F_HW_CSUM | NETIF_F_SG; > > if (csum) > > dev->features |= NETIF_F_HW_CSUM | NETIF_F_SG; > > @@ -2746,9 +2751,15 @@ static int virtnet_probe(struct virtio_device *vdev) > > dev->features |= dev->hw_features & NETIF_F_ALL_TSO; > > /* (!csum && gso) case will be fixed by register_netdev() */ > > } > > + > > if (virtio_has_feature(vdev, VIRTIO_NET_F_GUEST_CSUM)) > > dev->features |= NETIF_F_RXCSUM; > > > > + if (virtio_has_feature(vdev, VIRTIO_NET_F_HOST_SCTP_CSUM)) { > > + dev->hw_features |= NETIF_F_SCTP_CRC; > > + dev->features |= NETIF_F_SCTP_CRC; > > + } > > + > > dev->vlan_features = dev->features; > > > > /* MTU range: 68 - 65535 */ > > @@ -2962,7 +2973,8 @@ static struct virtio_device_id id_table[] = { > > VIRTIO_NET_F_GUEST_ANNOUNCE, VIRTIO_NET_F_MQ, \ > > VIRTIO_NET_F_CTRL_MAC_ADDR, \ > > VIRTIO_NET_F_MTU, VIRTIO_NET_F_CTRL_GUEST_OFFLOADS, \ > > - VIRTIO_NET_F_SPEED_DUPLEX > > + VIRTIO_NET_F_SPEED_DUPLEX, \ > > + VIRTIO_NET_F_HOST_SCTP_CSUM, VIRTIO_NET_F_GUEST_SCTP_CSUM > > > > static unsigned int features[] = { > > VIRTNET_FEATURES, > > diff --git a/include/linux/virtio_net.h b/include/linux/virtio_net.h > > index f144216..28fffdc 100644 > > --- a/include/linux/virtio_net.h > > +++ b/include/linux/virtio_net.h > > @@ -39,6 +39,9 @@ static inline int virtio_net_hdr_to_skb(struct sk_buff *skb, > > > > if (!skb_partial_csum_set(skb, start, off)) > > return -EINVAL; > > + > > + if (hdr->flags & VIRTIO_NET_HDR_F_CSUM_NOT_INET) > > + skb->csum_not_inet = 1; > > } > > > > if (hdr->gso_type != VIRTIO_NET_HDR_GSO_NONE) { > > @@ -91,6 +94,9 @@ static inline int virtio_net_hdr_from_skb(const struct sk_buff *skb, > > skb_checksum_start_offset(skb)); > > hdr->csum_offset = __cpu_to_virtio16(little_endian, > > skb->csum_offset); > > + > > + if (skb->csum_not_inet) > > + hdr->flags |= VIRTIO_NET_HDR_F_CSUM_NOT_INET; > > } else if (has_data_valid && > > skb->ip_summed == CHECKSUM_UNNECESSARY) { > > hdr->flags = VIRTIO_NET_HDR_F_DATA_VALID; > > diff --git a/include/uapi/linux/virtio_net.h b/include/uapi/linux/virtio_net.h > > index 5de6ed3..9dfca1a 100644 > > --- a/include/uapi/linux/virtio_net.h > > +++ b/include/uapi/linux/virtio_net.h > > @@ -57,6 +57,10 @@ > > * Steering */ > > #define VIRTIO_NET_F_CTRL_MAC_ADDR 23 /* Set MAC address */ > > > > +#define VIRTIO_NET_F_GUEST_SCTP_CSUM 61 /* Guest handles SCTP pks w/ partial > > + * csum */ > > +#define VIRTIO_NET_F_HOST_SCTP_CSUM 62 /* HOST handles SCTP pkts w/ partial > > + * csum */ > > #define VIRTIO_NET_F_SPEED_DUPLEX 63 /* Device set linkspeed and duplex */ > > > > #ifndef VIRTIO_NET_NO_LEGACY > > @@ -101,6 +105,7 @@ 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_CSUM_NOT_INET 4 /* Checksum is not inet */ > > Both comment and name are not very informative. > How about just saying CRC32c ? csum_not_inet is following the nomenclature used in sk_buff. Initially Davide had named the sk_buff field after crc32c but then it was argued that maybe another check method may be introduced later and the name would be bogus, thus why the "csum_not_inet". > > > __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) */ > > -- > > 2.9.5 > -- > To unsubscribe from this list: send the line "unsubscribe linux-sctp" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html >
WARNING: multiple messages have this Message-ID (diff)
From: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> To: "Michael S. Tsirkin" <mst@redhat.com> Cc: Vladislav Yasevich <vyasevich@gmail.com>, netdev@vger.kernel.org, linux-sctp@vger.kernel.org, virtualization@lists.linux-foundation.org, virtio-dev@lists.oasis-open.org, jasowang@redhat.com, nhorman@tuxdriver.com, Vladislav Yasevich <vyasevic@redhat.com> Subject: Re: [PATCH V2 net-next 1/6] virtio: Add support for SCTP checksum offloading Date: Wed, 02 May 2018 14:14:13 +0000 [thread overview] Message-ID: <20180502141413.GD5105@localhost.localdomain> (raw) In-Reply-To: <20180502061520-mutt-send-email-mst@kernel.org> On Wed, May 02, 2018 at 06:16:45AM +0300, Michael S. Tsirkin wrote: > On Tue, May 01, 2018 at 10:07:34PM -0400, Vladislav Yasevich wrote: > > To support SCTP checksum offloading, we need to add a new feature > > to virtio_net, so we can negotiate support between the hypervisor > > and the guest. > > The HOST feature bit signifies offloading support for transmit and > > enables device offload features. > > The GUEST feature bit signifies offloading support of recieve and > > is currently only used by the driver in case of xdp. > > > > That patch also adds an addition virtio_net header flag which > > mirrors the skb->csum_not_inet flag. This flags is used to indicate > > that is this an SCTP packet that needs its checksum computed by the > > lower layer. In this case, the lower layer is the host hypervisor or > > possibly HW nic that supporst CRC32c offload. > > > > In the case that GUEST feature bit is flag, it will be possible to > > receive a virtio_net header with this bit set, which will set the > > corresponding skb bit. SCTP protocol will be updated to correctly > > deal with it. > > > > Signed-off-by: Vladislav Yasevich <vyasevic@redhat.com> > > --- > > drivers/net/virtio_net.c | 14 +++++++++++++- > > include/linux/virtio_net.h | 6 ++++++ > > include/uapi/linux/virtio_net.h | 5 +++++ > > 3 files changed, 24 insertions(+), 1 deletion(-) > > > > diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c > > index 7b187ec..34af280 100644 > > --- a/drivers/net/virtio_net.c > > +++ b/drivers/net/virtio_net.c > > @@ -2148,6 +2148,8 @@ static int virtnet_clear_guest_offloads(struct virtnet_info *vi) > > > > if (virtio_has_feature(vi->vdev, VIRTIO_NET_F_GUEST_CSUM)) > > offloads = 1ULL << VIRTIO_NET_F_GUEST_CSUM; > > + if (virtio_has_feature(vi->vdev, VIRTIO_NET_F_GUEST_SCTP_CSUM)) > > + offloads |= 1ULL << VIRTIO_NET_F_GUEST_SCTP_CSUM; > > > > return virtnet_set_guest_offloads(vi, offloads); > > } > > @@ -2160,6 +2162,8 @@ static int virtnet_restore_guest_offloads(struct virtnet_info *vi) > > return 0; > > if (virtio_has_feature(vi->vdev, VIRTIO_NET_F_GUEST_CSUM)) > > offloads |= 1ULL << VIRTIO_NET_F_GUEST_CSUM; > > + if (virtio_has_feature(vi->vdev, VIRTIO_NET_F_GUEST_SCTP_CSUM)) > > + offloads |= 1ULL << VIRTIO_NET_F_GUEST_SCTP_CSUM; > > > > return virtnet_set_guest_offloads(vi, offloads); > > } > > @@ -2724,6 +2728,7 @@ static int virtnet_probe(struct virtio_device *vdev) > > /* Do we support "hardware" checksums? */ > > if (virtio_has_feature(vdev, VIRTIO_NET_F_CSUM)) { > > /* This opens up the world of extra features. */ > > + > > dev->hw_features |= NETIF_F_HW_CSUM | NETIF_F_SG; > > if (csum) > > dev->features |= NETIF_F_HW_CSUM | NETIF_F_SG; > > @@ -2746,9 +2751,15 @@ static int virtnet_probe(struct virtio_device *vdev) > > dev->features |= dev->hw_features & NETIF_F_ALL_TSO; > > /* (!csum && gso) case will be fixed by register_netdev() */ > > } > > + > > if (virtio_has_feature(vdev, VIRTIO_NET_F_GUEST_CSUM)) > > dev->features |= NETIF_F_RXCSUM; > > > > + if (virtio_has_feature(vdev, VIRTIO_NET_F_HOST_SCTP_CSUM)) { > > + dev->hw_features |= NETIF_F_SCTP_CRC; > > + dev->features |= NETIF_F_SCTP_CRC; > > + } > > + > > dev->vlan_features = dev->features; > > > > /* MTU range: 68 - 65535 */ > > @@ -2962,7 +2973,8 @@ static struct virtio_device_id id_table[] = { > > VIRTIO_NET_F_GUEST_ANNOUNCE, VIRTIO_NET_F_MQ, \ > > VIRTIO_NET_F_CTRL_MAC_ADDR, \ > > VIRTIO_NET_F_MTU, VIRTIO_NET_F_CTRL_GUEST_OFFLOADS, \ > > - VIRTIO_NET_F_SPEED_DUPLEX > > + VIRTIO_NET_F_SPEED_DUPLEX, \ > > + VIRTIO_NET_F_HOST_SCTP_CSUM, VIRTIO_NET_F_GUEST_SCTP_CSUM > > > > static unsigned int features[] = { > > VIRTNET_FEATURES, > > diff --git a/include/linux/virtio_net.h b/include/linux/virtio_net.h > > index f144216..28fffdc 100644 > > --- a/include/linux/virtio_net.h > > +++ b/include/linux/virtio_net.h > > @@ -39,6 +39,9 @@ static inline int virtio_net_hdr_to_skb(struct sk_buff *skb, > > > > if (!skb_partial_csum_set(skb, start, off)) > > return -EINVAL; > > + > > + if (hdr->flags & VIRTIO_NET_HDR_F_CSUM_NOT_INET) > > + skb->csum_not_inet = 1; > > } > > > > if (hdr->gso_type != VIRTIO_NET_HDR_GSO_NONE) { > > @@ -91,6 +94,9 @@ static inline int virtio_net_hdr_from_skb(const struct sk_buff *skb, > > skb_checksum_start_offset(skb)); > > hdr->csum_offset = __cpu_to_virtio16(little_endian, > > skb->csum_offset); > > + > > + if (skb->csum_not_inet) > > + hdr->flags |= VIRTIO_NET_HDR_F_CSUM_NOT_INET; > > } else if (has_data_valid && > > skb->ip_summed = CHECKSUM_UNNECESSARY) { > > hdr->flags = VIRTIO_NET_HDR_F_DATA_VALID; > > diff --git a/include/uapi/linux/virtio_net.h b/include/uapi/linux/virtio_net.h > > index 5de6ed3..9dfca1a 100644 > > --- a/include/uapi/linux/virtio_net.h > > +++ b/include/uapi/linux/virtio_net.h > > @@ -57,6 +57,10 @@ > > * Steering */ > > #define VIRTIO_NET_F_CTRL_MAC_ADDR 23 /* Set MAC address */ > > > > +#define VIRTIO_NET_F_GUEST_SCTP_CSUM 61 /* Guest handles SCTP pks w/ partial > > + * csum */ > > +#define VIRTIO_NET_F_HOST_SCTP_CSUM 62 /* HOST handles SCTP pkts w/ partial > > + * csum */ > > #define VIRTIO_NET_F_SPEED_DUPLEX 63 /* Device set linkspeed and duplex */ > > > > #ifndef VIRTIO_NET_NO_LEGACY > > @@ -101,6 +105,7 @@ 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_CSUM_NOT_INET 4 /* Checksum is not inet */ > > Both comment and name are not very informative. > How about just saying CRC32c ? csum_not_inet is following the nomenclature used in sk_buff. Initially Davide had named the sk_buff field after crc32c but then it was argued that maybe another check method may be introduced later and the name would be bogus, thus why the "csum_not_inet". > > > __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) */ > > -- > > 2.9.5 > -- > To unsubscribe from this list: send the line "unsubscribe linux-sctp" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html >
next prev parent reply other threads:[~2018-05-02 14:14 UTC|newest] Thread overview: 73+ messages / expand[flat|nested] mbox.gz Atom feed top 2018-05-02 2:07 [PATCH V2 net-next 0/6] virtio-net: Add SCTP checksum offload support Vladislav Yasevich 2018-05-02 2:07 ` Vladislav Yasevich 2018-05-02 2:07 ` [PATCH V2 net-next 1/6] virtio: Add support for SCTP checksum offloading Vladislav Yasevich 2018-05-02 2:07 ` Vladislav Yasevich 2018-05-02 3:16 ` Michael S. Tsirkin 2018-05-02 3:16 ` [virtio-dev] " Michael S. Tsirkin 2018-05-02 3:16 ` Michael S. Tsirkin 2018-05-02 13:00 ` [virtio-dev] " Vlad Yasevich 2018-05-02 14:14 ` Marcelo Ricardo Leitner [this message] 2018-05-02 14:14 ` Marcelo Ricardo Leitner 2018-05-02 14:21 ` Michael S. Tsirkin 2018-05-02 14:21 ` Michael S. Tsirkin 2018-05-02 14:21 ` [virtio-dev] " Michael S. Tsirkin 2018-05-02 14:21 ` Michael S. Tsirkin 2018-05-02 14:34 ` Marcelo Ricardo Leitner 2018-05-02 14:34 ` Marcelo Ricardo Leitner 2018-05-02 2:07 ` Vladislav Yasevich 2018-05-02 2:07 ` [PATCH V2 net-next 2/6] sctp: Handle sctp packets with CHECKSUM_PARTIAL Vladislav Yasevich 2018-05-02 2:07 ` Vladislav Yasevich 2018-05-02 2:07 ` Vladislav Yasevich 2018-05-02 14:38 ` Marcelo Ricardo Leitner 2018-05-02 14:38 ` Marcelo Ricardo Leitner 2018-08-20 14:54 ` Marcelo Ricardo Leitner 2018-08-20 14:54 ` Marcelo Ricardo Leitner 2018-08-20 15:39 ` David Laight 2018-08-20 15:39 ` David Laight 2018-08-20 15:39 ` David Laight 2018-05-02 2:07 ` [PATCH V2 net-next 3/6] sctp: Build sctp offload support into the base kernel Vladislav Yasevich 2018-05-02 2:07 ` Vladislav Yasevich 2018-05-02 2:07 ` [PATCH V2 net-next 4/6] tun: Add support for SCTP checksum offload Vladislav Yasevich 2018-05-02 2:07 ` Vladislav Yasevich 2018-05-02 14:53 ` Marcelo Ricardo Leitner 2018-05-02 14:53 ` Marcelo Ricardo Leitner 2018-05-02 14:56 ` Marcelo Ricardo Leitner 2018-05-02 14:56 ` Marcelo Ricardo Leitner 2018-05-02 17:17 ` Vlad Yasevich 2018-05-02 17:17 ` Vlad Yasevich 2018-05-02 17:17 ` [virtio-dev] " Vlad Yasevich 2018-05-02 17:17 ` Vlad Yasevich 2018-05-02 2:07 ` Vladislav Yasevich 2018-05-02 2:07 ` [PATCH V2 net-next 5/6] macvlan/macvtap: " Vladislav Yasevich 2018-05-02 2:07 ` Vladislav Yasevich 2018-05-02 3:24 ` Michael S. Tsirkin 2018-05-02 3:24 ` Michael S. Tsirkin 2018-05-02 3:24 ` [virtio-dev] " Michael S. Tsirkin 2018-05-02 3:24 ` Michael S. Tsirkin 2018-05-02 13:27 ` Vlad Yasevich 2018-05-02 13:27 ` Vlad Yasevich 2018-05-02 13:27 ` [virtio-dev] " Vlad Yasevich 2018-05-02 13:27 ` Vlad Yasevich 2018-05-02 13:46 ` Michael S. Tsirkin 2018-05-02 13:46 ` Michael S. Tsirkin 2018-05-02 13:46 ` [virtio-dev] " Michael S. Tsirkin 2018-05-02 13:46 ` Michael S. Tsirkin 2018-05-02 14:00 ` Vlad Yasevich 2018-05-02 14:00 ` [virtio-dev] " Vlad Yasevich 2018-05-02 14:00 ` Vlad Yasevich 2018-05-02 14:17 ` Michael S. Tsirkin 2018-05-02 14:17 ` [virtio-dev] " Michael S. Tsirkin 2018-05-02 14:17 ` Michael S. Tsirkin 2018-05-02 14:25 ` Vlad Yasevich 2018-05-02 14:25 ` Vlad Yasevich 2018-05-02 14:25 ` [virtio-dev] " Vlad Yasevich 2018-05-02 14:25 ` Vlad Yasevich 2018-05-02 14:00 ` Vlad Yasevich 2018-05-02 2:07 ` Vladislav Yasevich 2018-05-02 2:07 ` [PATCH V2 net-next 6/6] ipvlan: " Vladislav Yasevich 2018-05-02 2:07 ` Vladislav Yasevich 2018-05-02 8:12 ` Davide Caratti 2018-05-02 8:12 ` Davide Caratti 2018-05-02 2:07 ` Vladislav Yasevich 2018-05-02 21:57 ` [PATCH V2 net-next 0/6] virtio-net: Add SCTP checksum offload support Marcelo Ricardo Leitner 2018-05-02 21:57 ` Marcelo Ricardo Leitner
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