kvm.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Arseny Krasnov <arseny.krasnov@kaspersky.com>
To: Stefan Hajnoczi <stefanha@redhat.com>,
	Stefano Garzarella <sgarzare@redhat.com>,
	"Michael S. Tsirkin" <mst@redhat.com>,
	Jason Wang <jasowang@redhat.com>,
	"David S. Miller" <davem@davemloft.net>,
	Jakub Kicinski <kuba@kernel.org>,
	Arseny Krasnov <arseny.krasnov@kaspersky.com>,
	Colin Ian King <colin.king@canonical.com>,
	Andra Paraschiv <andraprs@amazon.com>,
	Jeff Vander Stoep <jeffv@google.com>
Cc: <kvm@vger.kernel.org>,
	<virtualization@lists.linux-foundation.org>,
	<netdev@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
	<stsp2@yandex.ru>, <oxffffaa@gmail.com>
Subject: [RFC PATCH v2 05/13] af_vsock: implement send logic for SOCK_SEQPACKET
Date: Fri, 15 Jan 2021 08:42:27 +0300	[thread overview]
Message-ID: <20210115054230.1456257-1-arseny.krasnov@kaspersky.com> (raw)
In-Reply-To: <20210115053553.1454517-1-arseny.krasnov@kaspersky.com>

This adds some logic to current stream enqueue function for SEQPACKET
support:
1) Send record begin marker with length of record.
2) Return value from enqueue function is wholevrecord length or error for
   SOCK_SEQPACKET.

Signed-off-by: Arseny Krasnov <arseny.krasnov@kaspersky.com>
---
 include/net/af_vsock.h   |  1 +
 net/vmw_vsock/af_vsock.c | 32 ++++++++++++++++++++++++++++----
 2 files changed, 29 insertions(+), 4 deletions(-)

diff --git a/include/net/af_vsock.h b/include/net/af_vsock.h
index 46073842d489..ec6bf4600ef8 100644
--- a/include/net/af_vsock.h
+++ b/include/net/af_vsock.h
@@ -136,6 +136,7 @@ struct vsock_transport {
 	bool (*stream_allow)(u32 cid, u32 port);
 
 	/* SEQ_PACKET. */
+	bool (*seqpacket_seq_send_len)(struct vsock_sock *, size_t len);
 	size_t (*seqpacket_seq_get_len)(struct vsock_sock *);
 	ssize_t (*seqpacket_dequeue)(struct vsock_sock *, struct msghdr *,
 				     size_t len, int flags);
diff --git a/net/vmw_vsock/af_vsock.c b/net/vmw_vsock/af_vsock.c
index 5bf887190881..4a7cdf7756c0 100644
--- a/net/vmw_vsock/af_vsock.c
+++ b/net/vmw_vsock/af_vsock.c
@@ -1683,8 +1683,8 @@ static int vsock_stream_getsockopt(struct socket *sock,
 	return 0;
 }
 
-static int vsock_stream_sendmsg(struct socket *sock, struct msghdr *msg,
-				size_t len)
+static int vsock_connectible_sendmsg(struct socket *sock, struct msghdr *msg,
+				     size_t len)
 {
 	struct sock *sk;
 	struct vsock_sock *vsk;
@@ -1737,6 +1737,12 @@ static int vsock_stream_sendmsg(struct socket *sock, struct msghdr *msg,
 	if (err < 0)
 		goto out;
 
+	if (sk->sk_type == SOCK_SEQPACKET) {
+		err = transport->seqpacket_seq_send_len(vsk, len);
+		if (err < 0)
+			goto out;
+	}
+
 	while (total_written < len) {
 		ssize_t written;
 
@@ -1815,13 +1821,31 @@ static int vsock_stream_sendmsg(struct socket *sock, struct msghdr *msg,
 	}
 
 out_err:
-	if (total_written > 0)
-		err = total_written;
+	if (total_written > 0) {
+		/* Return number of written bytes only if:
+		 * 1) SOCK_STREAM socket.
+		 * 2) SOCK_SEQPACKET socket when whole buffer is sent.
+		 */
+		if (sk->sk_type == SOCK_STREAM || total_written == len)
+			err = total_written;
+	}
 out:
 	release_sock(sk);
 	return err;
 }
 
+static int vsock_stream_sendmsg(struct socket *sock, struct msghdr *msg,
+				size_t len)
+{
+	return vsock_connectible_sendmsg(sock, msg, len);
+}
+
+static int vsock_seqpacket_sendmsg(struct socket *sock, struct msghdr *msg,
+				   size_t len)
+{
+	return vsock_connectible_sendmsg(sock, msg, len);
+}
+
 static int vsock_wait_data(struct sock *sk, struct wait_queue_entry *wait,
 			   long timeout,
 			   struct vsock_transport_recv_notify_data *recv_data,
-- 
2.25.1


  parent reply	other threads:[~2021-01-15  5:43 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-01-15  5:35 [RFC PATCH v2 00/13] virtio/vsock: introduce SOCK_SEQPACKET support Arseny Krasnov
2021-01-15  5:40 ` [RFC PATCH v2 01/13] af_vsock: implement 'vsock_wait_data()' Arseny Krasnov
2021-01-18 14:51   ` Stefano Garzarella
2021-01-15  5:40 ` [RFC PATCH v2 02/13] af_vsock: separate rx loops for STREAM/SEQPACKET Arseny Krasnov
2021-01-18 15:04   ` Stefano Garzarella
2021-01-15  5:41 ` [RFC PATCH v2 03/13] af_vsock: implement rx loops entry point Arseny Krasnov
2021-01-15  5:41 ` [RFC PATCH v2 04/13] af_vsock: replace previous stream rx loop Arseny Krasnov
2021-01-15  5:42 ` Arseny Krasnov [this message]
2021-01-15  5:42 ` [RFC PATCH v2 06/13] af_vsock: general support of SOCK_SEQPACKET type Arseny Krasnov
2021-01-18 15:12   ` Stefano Garzarella
2021-01-15  5:42 ` [RFC PATCH v2 07/13] af_vsock: update comments for stream sockets Arseny Krasnov
2021-01-15  5:43 ` [RFC PATCH v2 08/13] virtio/vsock: dequeue callback for SOCK_SEQPACKET Arseny Krasnov
2021-01-18 15:14   ` Stefano Garzarella
2021-01-15  5:43 ` [RFC PATCH v2 09/13] virtio/vsock: implement fetch of record length Arseny Krasnov
2021-01-15  5:44 ` [RFC PATCH v2 10/13] virtio/vsock: update receive logic Arseny Krasnov
2021-01-18 15:15   ` Stefano Garzarella
2021-01-15  5:44 ` [RFC PATCH v2 11/13] virtio/vsock: rest of SOCK_SEQPACKET support Arseny Krasnov
2021-01-18 15:15   ` Stefano Garzarella
2021-01-15  5:45 ` [RFC PATCH v2 12/13] vhost/vsock: support for SOCK_SEQPACKET socket Arseny Krasnov
2021-01-15  5:45 ` [RFC PATCH v2 13/13] vsock_test: add SOCK_SEQPACKET tests Arseny Krasnov
2021-01-15  9:59 ` [RFC PATCH v2 00/13] virtio/vsock: introduce SOCK_SEQPACKET support stsp
2021-01-18 15:16   ` Stefano Garzarella

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20210115054230.1456257-1-arseny.krasnov@kaspersky.com \
    --to=arseny.krasnov@kaspersky.com \
    --cc=andraprs@amazon.com \
    --cc=colin.king@canonical.com \
    --cc=davem@davemloft.net \
    --cc=jasowang@redhat.com \
    --cc=jeffv@google.com \
    --cc=kuba@kernel.org \
    --cc=kvm@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=mst@redhat.com \
    --cc=netdev@vger.kernel.org \
    --cc=oxffffaa@gmail.com \
    --cc=sgarzare@redhat.com \
    --cc=stefanha@redhat.com \
    --cc=stsp2@yandex.ru \
    --cc=virtualization@lists.linux-foundation.org \
    --subject='Re: [RFC PATCH v2 05/13] af_vsock: implement send logic for SOCK_SEQPACKET' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).