From: Bobby Eshleman <bobbyeshleman@gmail.com>
To: Bobby Eshleman <bobby.eshleman@gmail.com>
Cc: virtio-dev@lists.oasis-open.org,
Bobby Eshleman <bobby.eshleman@bytedance.com>,
Cong Wang <cong.wang@bytedance.com>,
Jiang Wang <jiang.wang@bytedance.com>,
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>,
Eric Dumazet <edumazet@google.com>,
Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
"K. Y. Srinivasan" <kys@microsoft.com>,
Haiyang Zhang <haiyangz@microsoft.com>,
Stephen Hemminger <sthemmin@microsoft.com>,
Wei Liu <wei.liu@kernel.org>, Dexuan Cui <decui@microsoft.com>,
kvm@vger.kernel.org, virtualization@lists.linux-foundation.org,
netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-hyperv@vger.kernel.org
Subject: Re: [PATCH 2/6] vsock: return errors other than -ENOMEM to socket
Date: Tue, 16 Aug 2022 02:30:59 +0000 [thread overview]
Message-ID: <YvsBYyPFnKRhvPfp@bullseye> (raw)
In-Reply-To: <d81818b868216c774613dd03641fcfe63cc55a45.1660362668.git.bobby.eshleman@bytedance.com>
CC'ing virtio-dev@lists.oasis-open.org
On Mon, Aug 15, 2022 at 10:56:05AM -0700, Bobby Eshleman wrote:
> This commit allows vsock implementations to return errors
> to the socket layer other than -ENOMEM. One immediate effect
> of this is that upon the sk_sndbuf threshold being reached -EAGAIN
> will be returned and userspace may throttle appropriately.
>
> Resultingly, a known issue with uperf is resolved[1].
>
> Additionally, to preserve legacy behavior for non-virtio
> implementations, hyperv/vmci force errors to be -ENOMEM so that behavior
> is unchanged.
>
> [1]: https://gitlab.com/vsock/vsock/-/issues/1
>
> Signed-off-by: Bobby Eshleman <bobby.eshleman@bytedance.com>
> ---
> include/linux/virtio_vsock.h | 3 +++
> net/vmw_vsock/af_vsock.c | 3 ++-
> net/vmw_vsock/hyperv_transport.c | 2 +-
> net/vmw_vsock/virtio_transport_common.c | 3 ---
> net/vmw_vsock/vmci_transport.c | 9 ++++++++-
> 5 files changed, 14 insertions(+), 6 deletions(-)
>
> diff --git a/include/linux/virtio_vsock.h b/include/linux/virtio_vsock.h
> index 17ed01466875..9a37eddbb87a 100644
> --- a/include/linux/virtio_vsock.h
> +++ b/include/linux/virtio_vsock.h
> @@ -8,6 +8,9 @@
> #include <net/sock.h>
> #include <net/af_vsock.h>
>
> +/* Threshold for detecting small packets to copy */
> +#define GOOD_COPY_LEN 128
> +
> enum virtio_vsock_metadata_flags {
> VIRTIO_VSOCK_METADATA_FLAGS_REPLY = BIT(0),
> VIRTIO_VSOCK_METADATA_FLAGS_TAP_DELIVERED = BIT(1),
> diff --git a/net/vmw_vsock/af_vsock.c b/net/vmw_vsock/af_vsock.c
> index e348b2d09eac..1893f8aafa48 100644
> --- a/net/vmw_vsock/af_vsock.c
> +++ b/net/vmw_vsock/af_vsock.c
> @@ -1844,8 +1844,9 @@ static int vsock_connectible_sendmsg(struct socket *sock, struct msghdr *msg,
> written = transport->stream_enqueue(vsk,
> msg, len - total_written);
> }
> +
> if (written < 0) {
> - err = -ENOMEM;
> + err = written;
> goto out_err;
> }
>
> diff --git a/net/vmw_vsock/hyperv_transport.c b/net/vmw_vsock/hyperv_transport.c
> index fd98229e3db3..e99aea571f6f 100644
> --- a/net/vmw_vsock/hyperv_transport.c
> +++ b/net/vmw_vsock/hyperv_transport.c
> @@ -687,7 +687,7 @@ static ssize_t hvs_stream_enqueue(struct vsock_sock *vsk, struct msghdr *msg,
> if (bytes_written)
> ret = bytes_written;
> kfree(send_buf);
> - return ret;
> + return ret < 0 ? -ENOMEM : ret;
> }
>
> static s64 hvs_stream_has_data(struct vsock_sock *vsk)
> diff --git a/net/vmw_vsock/virtio_transport_common.c b/net/vmw_vsock/virtio_transport_common.c
> index 920578597bb9..d5780599fe93 100644
> --- a/net/vmw_vsock/virtio_transport_common.c
> +++ b/net/vmw_vsock/virtio_transport_common.c
> @@ -23,9 +23,6 @@
> /* How long to wait for graceful shutdown of a connection */
> #define VSOCK_CLOSE_TIMEOUT (8 * HZ)
>
> -/* Threshold for detecting small packets to copy */
> -#define GOOD_COPY_LEN 128
> -
> static const struct virtio_transport *
> virtio_transport_get_ops(struct vsock_sock *vsk)
> {
> diff --git a/net/vmw_vsock/vmci_transport.c b/net/vmw_vsock/vmci_transport.c
> index b14f0ed7427b..c927a90dc859 100644
> --- a/net/vmw_vsock/vmci_transport.c
> +++ b/net/vmw_vsock/vmci_transport.c
> @@ -1838,7 +1838,14 @@ static ssize_t vmci_transport_stream_enqueue(
> struct msghdr *msg,
> size_t len)
> {
> - return vmci_qpair_enquev(vmci_trans(vsk)->qpair, msg, len, 0);
> + int err;
> +
> + err = vmci_qpair_enquev(vmci_trans(vsk)->qpair, msg, len, 0);
> +
> + if (err < 0)
> + err = -ENOMEM;
> +
> + return err;
> }
>
> static s64 vmci_transport_stream_has_data(struct vsock_sock *vsk)
> --
> 2.35.1
>
next prev parent reply other threads:[~2022-08-16 16:27 UTC|newest]
Thread overview: 67+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-08-15 17:56 [PATCH 0/6] virtio/vsock: introduce dgrams, sk_buff, and qdisc Bobby Eshleman
2022-08-15 17:56 ` [PATCH 1/6] vsock: replace virtio_vsock_pkt with sk_buff Bobby Eshleman
2022-08-16 2:30 ` Bobby Eshleman
2022-08-15 17:56 ` [PATCH 2/6] vsock: return errors other than -ENOMEM to socket Bobby Eshleman
2022-08-15 20:01 ` kernel test robot
2022-08-15 23:13 ` kernel test robot
2022-08-16 2:16 ` kernel test robot
2022-08-16 2:30 ` Bobby Eshleman [this message]
2022-08-17 5:28 ` [virtio-dev] " Arseniy Krasnov
2022-09-26 13:21 ` Stefano Garzarella
2022-09-26 21:30 ` Bobby Eshleman
2022-08-15 17:56 ` [PATCH 3/6] vsock: add netdev to vhost/virtio vsock Bobby Eshleman
2022-08-16 2:31 ` Bobby Eshleman
2022-08-16 16:38 ` Michael S. Tsirkin
2022-08-16 6:18 ` Bobby Eshleman
2022-08-16 18:07 ` Jakub Kicinski
2022-08-16 7:02 ` Bobby Eshleman
2022-08-16 23:07 ` Jakub Kicinski
2022-08-16 8:29 ` Bobby Eshleman
2022-08-17 1:15 ` Jakub Kicinski
2022-08-16 10:50 ` Bobby Eshleman
2022-08-17 17:20 ` Michael S. Tsirkin
2022-08-18 4:34 ` Jason Wang
2022-08-17 1:23 ` [External] " Cong Wang .
2022-09-06 10:58 ` Michael S. Tsirkin
2022-08-18 14:20 ` Bobby Eshleman
2022-08-15 17:56 ` [PATCH 4/6] virtio/vsock: add VIRTIO_VSOCK_F_DGRAM feature bit Bobby Eshleman
2022-08-16 2:31 ` Bobby Eshleman
2022-09-26 13:17 ` Stefano Garzarella
2022-09-26 21:52 ` Bobby Eshleman
2022-08-15 17:56 ` [PATCH 5/6] virtio/vsock: add support for dgram Bobby Eshleman
2022-08-15 21:02 ` kernel test robot
2022-08-16 2:32 ` Bobby Eshleman
2022-08-17 5:01 ` [virtio-dev] " Arseniy Krasnov
2022-08-16 9:57 ` Bobby Eshleman
2022-08-18 8:24 ` Arseniy Krasnov
2022-08-17 5:42 ` Arseniy Krasnov
2022-08-16 9:58 ` Bobby Eshleman
2022-08-18 8:35 ` Arseniy Krasnov
2022-08-16 20:52 ` Bobby Eshleman
2022-08-19 4:30 ` Arseniy Krasnov
2022-08-15 17:56 ` [PATCH 6/6] vsock_test: add tests for vsock dgram Bobby Eshleman
2022-08-16 2:32 ` Bobby Eshleman
2022-08-15 20:39 ` [PATCH 0/6] virtio/vsock: introduce dgrams, sk_buff, and qdisc Michael S. Tsirkin
2022-08-16 1:55 ` Bobby Eshleman
2022-08-16 2:29 ` Bobby Eshleman
[not found] ` <CAGxU2F7+L-UiNPtUm4EukOgTVJ1J6Orqs1LMvhWWvfL9zWb23g@mail.gmail.com>
2022-08-16 2:35 ` Bobby Eshleman
2022-08-17 6:54 ` Michael S. Tsirkin
2022-08-16 9:42 ` Bobby Eshleman
2022-08-17 17:02 ` Michael S. Tsirkin
2022-08-16 11:08 ` Bobby Eshleman
2022-08-17 17:53 ` Michael S. Tsirkin
2022-08-16 12:10 ` Bobby Eshleman
2022-08-18 4:28 ` Jason Wang
2022-09-06 9:00 ` Stefano Garzarella
2022-09-06 13:26 ` Stefan Hajnoczi
2022-08-18 14:39 ` Bobby Eshleman
2022-09-08 8:30 ` Stefano Garzarella
2022-09-08 14:36 ` Call to discuss vsock netdev/sk_buff [was Re: [PATCH 0/6] virtio/vsock: introduce dgrams, sk_buff, and qdisc] Stefano Garzarella
2022-09-09 18:13 ` Bobby Eshleman
2022-09-12 18:12 ` Stefano Garzarella
2022-09-09 23:33 ` Bobby Eshleman
2022-09-16 3:51 ` Stefano Garzarella
2022-09-10 16:29 ` Bobby Eshleman
2022-09-26 13:42 ` [PATCH 0/6] virtio/vsock: introduce dgrams, sk_buff, and qdisc Stefano Garzarella
2022-09-26 21:44 ` Bobby Eshleman
2022-09-27 17:45 ` Stefano Garzarella
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