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>,
Jorgen Hansen <jhansen@vmware.com>,
Norbert Slusarek <nslusarek@gmx.net>,
Andra Paraschiv <andraprs@amazon.com>,
Colin Ian King <colin.king@canonical.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 v9 19/19] af_vsock: serialize writes to shared socket
Date: Sat, 8 May 2021 19:37:35 +0300 [thread overview]
Message-ID: <20210508163738.3432975-1-arseny.krasnov@kaspersky.com> (raw)
In-Reply-To: <20210508163027.3430238-1-arseny.krasnov@kaspersky.com>
This add logic, that serializes write access to single socket
by multiple threads. It is implemented be adding field with TID
of current writer. When writer tries to send something, it checks
that field is -1(free), else it sleep in the same way as waiting
for free space at peers' side.
Signed-off-by: Arseny Krasnov <arseny.krasnov@kaspersky.com>
---
include/net/af_vsock.h | 1 +
net/vmw_vsock/af_vsock.c | 10 +++++++++-
2 files changed, 10 insertions(+), 1 deletion(-)
diff --git a/include/net/af_vsock.h b/include/net/af_vsock.h
index 1747c0b564ef..413343f18e99 100644
--- a/include/net/af_vsock.h
+++ b/include/net/af_vsock.h
@@ -69,6 +69,7 @@ struct vsock_sock {
u64 buffer_size;
u64 buffer_min_size;
u64 buffer_max_size;
+ pid_t tid_owner;
/* Private to transport. */
void *trans;
diff --git a/net/vmw_vsock/af_vsock.c b/net/vmw_vsock/af_vsock.c
index 7790728465f4..1fb4a1860f6d 100644
--- a/net/vmw_vsock/af_vsock.c
+++ b/net/vmw_vsock/af_vsock.c
@@ -757,6 +757,7 @@ static struct sock *__vsock_create(struct net *net,
vsk->peer_shutdown = 0;
INIT_DELAYED_WORK(&vsk->connect_work, vsock_connect_timeout);
INIT_DELAYED_WORK(&vsk->pending_work, vsock_pending_work);
+ vsk->tid_owner = -1;
psk = parent ? vsock_sk(parent) : NULL;
if (parent) {
@@ -1765,7 +1766,9 @@ static int vsock_connectible_sendmsg(struct socket *sock, struct msghdr *msg,
ssize_t written;
add_wait_queue(sk_sleep(sk), &wait);
- while (vsock_stream_has_space(vsk) == 0 &&
+ while ((vsock_stream_has_space(vsk) == 0 ||
+ (vsk->tid_owner != current->pid &&
+ vsk->tid_owner != -1)) &&
sk->sk_err == 0 &&
!(sk->sk_shutdown & SEND_SHUTDOWN) &&
!(vsk->peer_shutdown & RCV_SHUTDOWN)) {
@@ -1796,6 +1799,8 @@ static int vsock_connectible_sendmsg(struct socket *sock, struct msghdr *msg,
goto out_err;
}
}
+
+ vsk->tid_owner = current->pid;
remove_wait_queue(sk_sleep(sk), &wait);
/* These checks occur both as part of and after the loop
@@ -1852,7 +1857,10 @@ static int vsock_connectible_sendmsg(struct socket *sock, struct msghdr *msg,
err = total_written;
}
out:
+ vsk->tid_owner = -1;
release_sock(sk);
+ sk->sk_write_space(sk);
+
return err;
}
--
2.25.1
next prev parent reply other threads:[~2021-05-08 16:37 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-08 16:30 [RFC PATCH v9 00/19] virtio/vsock: introduce SOCK_SEQPACKET support Arseny Krasnov
2021-05-08 16:32 ` [RFC PATCH v9 01/19] af_vsock: update functions for connectible socket Arseny Krasnov
2021-05-08 16:32 ` [RFC PATCH v9 02/19] af_vsock: separate wait data loop Arseny Krasnov
2021-05-08 16:33 ` [RFC PATCH v9 03/19] af_vsock: separate receive " Arseny Krasnov
2021-05-08 16:33 ` [RFC PATCH v9 04/19] af_vsock: implement SEQPACKET receive loop Arseny Krasnov
2021-05-13 11:37 ` Stefano Garzarella
2021-05-13 14:41 ` Arseny Krasnov
2021-05-08 16:33 ` [RFC PATCH v9 05/19] af_vsock: implement send logic for SEQPACKET Arseny Krasnov
2021-05-08 16:33 ` [RFC PATCH v9 06/19] af_vsock: rest of SEQPACKET support Arseny Krasnov
2021-05-13 11:42 ` Stefano Garzarella
2021-05-08 16:34 ` [RFC PATCH v9 07/19] af_vsock: update comments for stream sockets Arseny Krasnov
2021-05-08 16:34 ` [RFC PATCH v9 08/19] virtio/vsock: set packet's type in virtio_transport_send_pkt_info() Arseny Krasnov
2021-05-08 16:34 ` [RFC PATCH v9 09/19] virtio/vsock: simplify credit update function API Arseny Krasnov
2021-05-08 16:35 ` [RFC PATCH v9 10/19] virtio/vsock: defines and constants for SEQPACKET Arseny Krasnov
2021-05-13 11:45 ` Stefano Garzarella
2021-05-13 14:42 ` Arseny Krasnov
2021-05-08 16:35 ` [RFC PATCH v9 11/19] virtio/vsock: dequeue callback for SOCK_SEQPACKET Arseny Krasnov
2021-05-13 11:58 ` Stefano Garzarella
2021-05-13 14:42 ` Arseny Krasnov
2021-05-13 12:18 ` Stefano Garzarella
2021-05-08 16:35 ` [RFC PATCH v9 12/19] virtio/vsock: add SEQPACKET receive logic Arseny Krasnov
2021-05-13 12:14 ` Stefano Garzarella
2021-05-13 14:43 ` Arseny Krasnov
2021-05-08 16:35 ` [RFC PATCH v9 13/19] virtio/vsock: rest of SOCK_SEQPACKET support Arseny Krasnov
2021-05-13 12:27 ` Stefano Garzarella
2021-05-13 13:03 ` Stefano Garzarella
2021-05-08 16:36 ` [RFC PATCH v9 14/19] virtio/vsock: enable SEQPACKET for transport Arseny Krasnov
2021-05-13 12:49 ` Stefano Garzarella
2021-05-13 14:44 ` Arseny Krasnov
2021-05-08 16:36 ` [RFC PATCH v9 15/19] vhost/vsock: " Arseny Krasnov
2021-05-13 13:44 ` Stefano Garzarella
2021-05-08 16:36 ` [RFC PATCH v9 16/19] vsock/loopback: " Arseny Krasnov
2021-05-08 16:37 ` [RFC PATCH v9 17/19] vsock_test: add SOCK_SEQPACKET tests Arseny Krasnov
2021-05-13 13:47 ` Stefano Garzarella
2021-05-08 16:37 ` [RFC PATCH v9 18/19] virtio/vsock: update trace event for SEQPACKET Arseny Krasnov
2021-05-08 16:37 ` Arseny Krasnov [this message]
2021-05-13 14:01 ` [RFC PATCH v9 19/19] af_vsock: serialize writes to shared socket Stefano Garzarella
2021-05-13 14:45 ` Arseny Krasnov
2021-05-13 14:46 ` Stefano Garzarella
2021-05-13 14:48 ` Arseny Krasnov
2021-05-13 15:41 ` Stefano Garzarella
2021-05-13 14:51 ` Arseny Krasnov
2021-05-13 14:10 ` [RFC PATCH v9 00/19] virtio/vsock: introduce SOCK_SEQPACKET support Stefano Garzarella
2021-05-13 14:46 ` Arseny Krasnov
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