[RFC PATCH v3 6/9] vsock: add API call for data ready
From: Arseniy Krasnov <hidden>
Date: 2022-08-03 14:02:18
Also in:
kvm, linux-hyperv, lkml
Subsystem:
networking [general], the rest, vm sockets (af_vsock) · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds, Stefano Garzarella
This adds 'vsock_data_ready()' which must be called by transport to kick sleeping data readers. It checks for SO_RCVLOWAT value before waking user,thus preventing spurious wake ups.Based on 'tcp_data_ready()' logic. Signed-off-by: Arseniy Krasnov <redacted> --- include/net/af_vsock.h | 1 + net/vmw_vsock/af_vsock.c | 10 ++++++++++ 2 files changed, 11 insertions(+)
diff --git a/include/net/af_vsock.h b/include/net/af_vsock.h
index eae5874bae35..7b79fc5164cc 100644
--- a/include/net/af_vsock.h
+++ b/include/net/af_vsock.h@@ -77,6 +77,7 @@ struct vsock_sock { s64 vsock_stream_has_data(struct vsock_sock *vsk); s64 vsock_stream_has_space(struct vsock_sock *vsk); struct sock *vsock_create_connected(struct sock *parent); +void vsock_data_ready(struct sock *sk); /**** TRANSPORT ****/
diff --git a/net/vmw_vsock/af_vsock.c b/net/vmw_vsock/af_vsock.c
index 3a1426eb8baa..47e80a7cbbdf 100644
--- a/net/vmw_vsock/af_vsock.c
+++ b/net/vmw_vsock/af_vsock.c@@ -882,6 +882,16 @@ s64 vsock_stream_has_space(struct vsock_sock *vsk) } EXPORT_SYMBOL_GPL(vsock_stream_has_space); +void vsock_data_ready(struct sock *sk) +{ + struct vsock_sock *vsk = vsock_sk(sk); + + if (vsock_stream_has_data(vsk) >= sk->sk_rcvlowat || + sock_flag(sk, SOCK_DONE)) + sk->sk_data_ready(sk); +} +EXPORT_SYMBOL_GPL(vsock_data_ready); + static int vsock_release(struct socket *sock) { __vsock_release(sock->sk, 0);
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2.25.1