[PATCH RFC 08/10] net: introduce the skb_copy_to_va_nocache() helper

[Yunsheng Lin <linyunsheng@huawei.com>]

introduce the skb_copy_to_va_nocache() helper to avoid
calling virt_to_page() and skb_copy_to_page_nocache().

Signed-off-by: Yunsheng Lin <linyunsheng@huawei.com>
---
 include/net/sock.h | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/include/net/sock.h b/include/net/sock.h
index b5e00702acc1..20df93699b60 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -2265,6 +2265,21 @@ static inline int skb_copy_to_page_nocache(struct sock *sk, struct iov_iter *fro
 	return 0;
 }
 
+static inline int skb_copy_to_va_nocache(struct sock *sk, struct iov_iter *from,
+					 struct sk_buff *skb, char *va, int copy)
+{
+	int err;
+
+	err = skb_do_copy_data_nocache(sk, skb, from, va, copy, skb->len);
+	if (err)
+		return err;
+
+	skb_len_add(skb, copy);
+	sk_wmem_queued_add(sk, copy);
+	sk_mem_charge(sk, copy);
+	return 0;
+}
+
 /**
  * sk_wmem_alloc_get - returns write allocations
  * @sk: socket
-- 
2.33.0