From: Arseniy Krasnov <AVKrasnov@sberdevices.ru>
To: Stefan Hajnoczi <stefanha@redhat.com>,
Stefano Garzarella <sgarzare@redhat.com>,
"David S. Miller" <davem@davemloft.net>,
Eric Dumazet <edumazet@google.com>,
Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
"Michael S. Tsirkin" <mst@redhat.com>,
Jason Wang <jasowang@redhat.com>,
Bobby Eshleman <bobby.eshleman@bytedance.com>
Cc: <kvm@vger.kernel.org>,
<virtualization@lists.linux-foundation.org>,
<netdev@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
<kernel@sberdevices.ru>, <oxffffaa@gmail.com>,
<avkrasnov@sberdevices.ru>,
Arseniy Krasnov <AVKrasnov@sberdevices.ru>
Subject: [RFC PATCH v5 06/17] vsock: fix EPOLLERR set on non-empty error queue
Date: Sat, 1 Jul 2023 09:22:59 +0300 [thread overview]
Message-ID: <20230701062310.3397129-7-AVKrasnov@sberdevices.ru> (raw)
In-Reply-To: <20230701062310.3397129-1-AVKrasnov@sberdevices.ru>
If socket's error queue is not empty, EPOLLERR must be set. Otherwise,
reader of error queue won't detect data in it using EPOLLERR bit.
Currently for AF_VSOCK this is reproducible only with MSG_ZEROCOPY, as
this feature is the only user of an error queue of the socket.
Fixes: d021c344051a ("VSOCK: Introduce VM Sockets")
Signed-off-by: Arseniy Krasnov <AVKrasnov@sberdevices.ru>
---
Changelog:
v4 -> v5:
* Change commit message as Fix patch. Also add details that this
problem could be reproduced only with MSG_ZEROCOPY transmission
mode.
net/vmw_vsock/af_vsock.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/net/vmw_vsock/af_vsock.c b/net/vmw_vsock/af_vsock.c
index efb8a0937a13..45fd20c4ed50 100644
--- a/net/vmw_vsock/af_vsock.c
+++ b/net/vmw_vsock/af_vsock.c
@@ -1030,7 +1030,7 @@ static __poll_t vsock_poll(struct file *file, struct socket *sock,
poll_wait(file, sk_sleep(sk), wait);
mask = 0;
- if (sk->sk_err)
+ if (sk->sk_err || !skb_queue_empty_lockless(&sk->sk_error_queue))
/* Signify that there has been an error on this socket. */
mask |= EPOLLERR;
--
2.25.1
next prev parent reply other threads:[~2023-07-01 6:39 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-07-01 6:22 [RFC PATCH v5 00/17] vsock: MSG_ZEROCOPY flag support Arseniy Krasnov
2023-07-01 6:22 ` [RFC PATCH v5 01/17] vsock/virtio: read data from non-linear skb Arseniy Krasnov
2023-07-01 6:22 ` [RFC PATCH v5 02/17] vhost/vsock: " Arseniy Krasnov
2023-07-01 6:22 ` [RFC PATCH v5 03/17] vsock/virtio: support to send " Arseniy Krasnov
2023-07-01 6:22 ` [RFC PATCH v5 04/17] vsock/virtio: non-linear skb handling for tap Arseniy Krasnov
2023-07-01 6:22 ` [RFC PATCH v5 05/17] vsock/virtio: MSG_ZEROCOPY flag support Arseniy Krasnov
2023-07-01 6:22 ` Arseniy Krasnov [this message]
2023-07-01 6:23 ` [RFC PATCH v5 07/17] vsock: read from socket's error queue Arseniy Krasnov
2023-07-01 6:23 ` [RFC PATCH v5 08/17] vsock: check for MSG_ZEROCOPY support on send Arseniy Krasnov
2023-07-01 6:23 ` [RFC PATCH v5 09/17] vsock: enable SOCK_SUPPORT_ZC bit Arseniy Krasnov
2023-07-01 6:23 ` [RFC PATCH v5 10/17] vhost/vsock: support MSG_ZEROCOPY for transport Arseniy Krasnov
2023-07-01 6:23 ` [RFC PATCH v5 11/17] vsock/virtio: " Arseniy Krasnov
2023-07-01 6:23 ` [RFC PATCH v5 12/17] vsock/loopback: " Arseniy Krasnov
2023-07-01 6:23 ` [RFC PATCH v5] vsock: enable setting SO_ZEROCOPY Arseniy Krasnov
2023-07-01 6:26 ` Arseniy Krasnov
2023-07-01 6:38 ` Arseniy Krasnov
2023-07-01 6:23 ` [RFC PATCH v5 14/17] docs: net: description of MSG_ZEROCOPY for AF_VSOCK Arseniy Krasnov
2023-07-01 6:23 ` [RFC PATCH v5 15/17] test/vsock: MSG_ZEROCOPY flag tests Arseniy Krasnov
2023-07-01 6:23 ` [RFC PATCH v5 16/17] test/vsock: MSG_ZEROCOPY support for vsock_perf Arseniy Krasnov
2023-07-01 6:23 ` [RFC PATCH v5 17/17] test/vsock: io_uring rx/tx tests Arseniy Krasnov
2023-07-01 6:45 ` [RFC PATCH v5 00/17] vsock: MSG_ZEROCOPY flag support Arseniy Krasnov
2023-07-01 6:39 Arseniy Krasnov
2023-07-01 6:39 ` [RFC PATCH v5 06/17] vsock: fix EPOLLERR set on non-empty error queue Arseniy Krasnov
2023-07-06 16:54 ` Stefano Garzarella
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