From: Joe Damato <jdamato@fastly.com>
To: "David S. Miller" <davem@davemloft.net>,
Eric Dumazet <edumazet@google.com>,
Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
netdev@vger.kernel.org, linux-kernel@vger.kernel.org
Cc: Joe Damato <jdamato@fastly.com>
Subject: [RFC,net-next v2 5/8] net: unix: Support MSG_NTCOPY
Date: Sun, 12 Jun 2022 01:57:54 -0700 [thread overview]
Message-ID: <1655024280-23827-6-git-send-email-jdamato@fastly.com> (raw)
In-Reply-To: <1655024280-23827-1-git-send-email-jdamato@fastly.com>
Add support for MSG_NTCOPY to unix sockets. The helper function
msg_set_iter_copy_type is used to set the copy flag on the iovec iterator
correctly.
Signed-off-by: Joe Damato <jdamato@fastly.com>
---
net/unix/af_unix.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/net/unix/af_unix.c b/net/unix/af_unix.c
index 3453e00..b8f522d 100644
--- a/net/unix/af_unix.c
+++ b/net/unix/af_unix.c
@@ -1905,6 +1905,8 @@ static int unix_dgram_sendmsg(struct socket *sock, struct msghdr *msg,
skb_put(skb, len - data_len);
skb->data_len = data_len;
skb->len = len;
+
+ msg_set_iter_copy_type(msg);
err = skb_copy_datagram_from_iter(skb, 0, &msg->msg_iter, len);
if (err)
goto out_free;
@@ -2165,6 +2167,8 @@ static int unix_stream_sendmsg(struct socket *sock, struct msghdr *msg,
skb_put(skb, size - data_len);
skb->data_len = data_len;
skb->len = size;
+
+ msg_set_iter_copy_type(msg);
err = skb_copy_datagram_from_iter(skb, 0, &msg->msg_iter, size);
if (err) {
kfree_skb(skb);
--
2.7.4
next prev parent reply other threads:[~2022-06-12 9:01 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-06-12 8:57 [RFC,net-next,x86 v2 0/8] Nontemporal copies in sendmsg path Joe Damato
2022-06-12 8:57 ` [RFC,x86 v2 1/8] arch, x86, uaccess: Add nontemporal copy functions Joe Damato
2022-06-12 8:57 ` [RFC,iov_iter v2 2/8] iov_iter: Introduce iter_copy_type Joe Damato
2022-06-12 8:57 ` [RFC,iov_iter v2 3/8] iov_iter: add copyin_iovec helper Joe Damato
2022-06-13 4:25 ` Al Viro
2022-06-13 6:32 ` Joe Damato
2022-06-13 7:53 ` David Laight
2022-06-13 14:42 ` Joe Damato
2022-06-13 15:31 ` David Laight
2022-06-12 8:57 ` [RFC,net-next v2 4/8] net: Add MSG_NTCOPY sendmsg flag Joe Damato
2022-06-12 8:57 ` Joe Damato [this message]
2022-06-12 8:57 ` [RFC,net-next v2 6/8] net: ip: Support MSG_NTCOPY Joe Damato
2022-06-12 8:57 ` [RFC,net-next v2 7/8] net: udplite: " Joe Damato
2022-06-12 8:57 ` [RFC,net-next v2 8/8] net: tcp: " Joe Damato
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