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authorYuri Benditovich <yuri.benditovich@daynix.com>2020-03-02 14:50:03 +0300
committerMichael S. Tsirkin <mst@redhat.com>2020-03-23 16:50:02 +0300
commit3024e20958ee9e1554951df4d26aaf9f5cb7c210 (patch)
tree64c95a4b9b5e8a80477546364620ad91f453a442 /include/uapi/linux/virtio_net.h
parentfd58bf674564f1731ca8a61a5150d40383f3df60 (diff)
downloadlinux-3024e20958ee9e1554951df4d26aaf9f5cb7c210.tar.xz
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>
Diffstat (limited to 'include/uapi/linux/virtio_net.h')
-rw-r--r--include/uapi/linux/virtio_net.h36
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.