linux-kernel - [PATCH net-next v6 11/15] net: introduce the skb_copy_to_va

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20240605133306.11272-12-linyunsheng@huawei.com>
Date: Wed, 5 Jun 2024 21:33:01 +0800
From: Yunsheng Lin <linyunsheng@...wei.com>
To: <davem@...emloft.net>, <kuba@...nel.org>, <pabeni@...hat.com>
CC: <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>, Yunsheng Lin
	<linyunsheng@...wei.com>, Alexander Duyck <alexander.duyck@...il.com>, Eric
 Dumazet <edumazet@...gle.com>
Subject: [PATCH net-next v6 11/15] net: introduce the skb_copy_to_va_nocache() helper

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

CC: Alexander Duyck <alexander.duyck@...il.com>
Signed-off-by: Yunsheng Lin <linyunsheng@...wei.com>
---
 include/net/sock.h | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/include/net/sock.h b/include/net/sock.h
index 5f4d0629348f..7541f8dd1746 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -2203,6 +2203,21 @@ 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
-- 
2.30.0