diff mbox series

[RFC,v2,4/7] virtio_net: Add virtio_net_hdr_v1_hash_from_skb()

Message ID 20231015141644.260646-5-akihiko.odaki@daynix.com (mailing list archive)
State New
Headers show
Series tun: Introduce virtio-net hashing feature | expand

Commit Message

Akihiko Odaki Oct. 15, 2023, 2:16 p.m. UTC 
It is identical with virtio_net_hdr_from_skb() except that it
impelements hash reporting.

Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
---
 include/linux/virtio_net.h | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)
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Patch

diff --git a/include/linux/virtio_net.h b/include/linux/virtio_net.h
index 7b4dd69555e4..01e594b4586b 100644
--- a/include/linux/virtio_net.h
+++ b/include/linux/virtio_net.h
@@ -216,4 +216,26 @@  static inline int virtio_net_hdr_from_skb(const struct sk_buff *skb,
 	return 0;
 }
 
+static inline int virtio_net_hdr_v1_hash_from_skb(const struct sk_buff *skb,
+						  struct virtio_net_hdr_v1_hash *hdr,
+						  bool little_endian,
+						  bool has_data_valid,
+						  int vlan_hlen,
+						  u32 hash_value,
+						  u16 hash_report)
+{
+	int ret;
+
+	memset(hdr, 0, sizeof(*hdr));
+
+	ret = virtio_net_hdr_from_skb(skb, (struct virtio_net_hdr *)hdr,
+				      little_endian, has_data_valid, vlan_hlen);
+	if (!ret) {
+		hdr->hash_value = cpu_to_le32(hash_value);
+		hdr->hash_report = cpu_to_le16(hash_report);
+	}
+
+	return ret;
+}
+
 #endif /* _LINUX_VIRTIO_NET_H */