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| author |   Yuri Benditovich <yuri.benditovich@daynix.com> | 2020-03-02 13:50:03 +0200 |
|---|---|---|
| committer |   Michael S. Tsirkin <mst@redhat.com> | 2020-03-23 09:50:02 -0400 |
| commit | 3024e20958ee9e1554951df4d26aaf9f5cb7c210 (patch) | |
| tree | 64c95a4b9b5e8a80477546364620ad91f453a442 | |
| parent | virtio-net: Introduce RSS receive steering feature (diff) | |
| download | linux-dev-3024e20958ee9e1554951df4d26aaf9f5cb7c210.tar.xz linux-dev-3024e20958ee9e1554951df4d26aaf9f5cb7c210.zip | |
virtio-net: Introduce hash report feature
The feature VIRTIO_NET_F_HASH_REPORT extends the
layout of the packet and requests the device to
calculate hash on incoming packets and report it
in the packet header.
Signed-off-by: Yuri Benditovich <yuri.benditovich@daynix.com>
Link: https://lore.kernel.org/r/20200302115003.14877-4-yuri.benditovich@daynix.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
| -rw-r--r-- | include/uapi/linux/virtio_net.h | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/include/uapi/linux/virtio_net.h b/include/uapi/linux/virtio_net.h index aec6fac3666a..19d23e5baa4e 100644 --- a/include/uapi/linux/virtio_net.h +++ b/include/uapi/linux/virtio_net.h @@ -57,6 +57,7 @@ * Steering */ #define VIRTIO_NET_F_CTRL_MAC_ADDR 23 /* Set MAC address */ +#define VIRTIO_NET_F_HASH_REPORT 57 /* Supports hash report */ #define VIRTIO_NET_F_RSS 60 /* Supports RSS RX steering */ #define VIRTIO_NET_F_RSC_EXT 61 /* extended coalescing info */ #define VIRTIO_NET_F_STANDBY 62 /* Act as standby for another device @@ -156,6 +157,23 @@ struct virtio_net_hdr_v1 { __virtio16 num_buffers; /* Number of merged rx buffers */ }; +struct virtio_net_hdr_v1_hash { + struct virtio_net_hdr_v1 hdr; + __le32 hash_value; +#define VIRTIO_NET_HASH_REPORT_NONE 0 +#define VIRTIO_NET_HASH_REPORT_IPv4 1 +#define VIRTIO_NET_HASH_REPORT_TCPv4 2 +#define VIRTIO_NET_HASH_REPORT_UDPv4 3 +#define VIRTIO_NET_HASH_REPORT_IPv6 4 +#define VIRTIO_NET_HASH_REPORT_TCPv6 5 +#define VIRTIO_NET_HASH_REPORT_UDPv6 6 +#define VIRTIO_NET_HASH_REPORT_IPv6_EX 7 +#define VIRTIO_NET_HASH_REPORT_TCPv6_EX 8 +#define VIRTIO_NET_HASH_REPORT_UDPv6_EX 9 + __le16 hash_report; + __le16 padding; +}; + #ifndef VIRTIO_NET_NO_LEGACY /* This header comes first in the scatter-gather list. * For legacy virtio, if VIRTIO_F_ANY_LAYOUT is not negotiated, it must @@ -305,6 +323,24 @@ struct virtio_net_rss_config { #define VIRTIO_NET_CTRL_MQ_RSS_CONFIG 1 /* + * The command VIRTIO_NET_CTRL_MQ_HASH_CONFIG requests the device + * to include in the virtio header of the packet the value of the + * calculated hash and the report type of hash. It also provides + * parameters for hash calculation. The command requires feature + * VIRTIO_NET_F_HASH_REPORT to be negotiated to extend the + * layout of virtio header as defined in virtio_net_hdr_v1_hash. + */ +struct virtio_net_hash_config { + __le32 hash_types; + /* for compatibility with virtio_net_rss_config */ + __le16 reserved[4]; + __u8 hash_key_length; + __u8 hash_key_data[/* hash_key_length */]; +}; + + #define VIRTIO_NET_CTRL_MQ_HASH_CONFIG 2 + +/* * Control network offloads * * Reconfigures the network offloads that Guest can handle. |