Commit f2fdcf67 authored by Arseniy Krasnov's avatar Arseniy Krasnov Committed by Paolo Abeni
Browse files

vsock: add API call for data ready 



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: default avatarArseniy Krasnov <AVKrasnov@sberdevices.ru>
Reviewed-by: default avatarStefano Garzarella <sgarzare@redhat.com>
Signed-off-by: default avatarPaolo Abeni <pabeni@redhat.com>
parent ee0b3843

include/net/af_vsock.h

+1 −0
Original line number Diff line number Diff line
@@ -78,6 +78,7 @@ 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 ****/

net/vmw_vsock/af_vsock.c

+10 −0
Original line number Diff line number Diff line
@@ -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);