[RFC PATCH v2 1/9] vsock: use sk_rcvlowat to set POLLIN/POLLRDNORM
From: Arseniy Krasnov <hidden>
Date: 2022-07-25 07:57:28
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
Both bits indicate, that next data read call won't be blocked, but when sk_rcvlowat is not 1, these bits will be set by poll anyway, thus when user tries to dequeue data,it will wait until sk_rcvlowat bytes of data will be available. Signed-off-by: Arseniy Krasnov <redacted> --- net/vmw_vsock/af_vsock.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/net/vmw_vsock/af_vsock.c b/net/vmw_vsock/af_vsock.c
index f04abf662ec6..63a13fa2686a 100644
--- a/net/vmw_vsock/af_vsock.c
+++ b/net/vmw_vsock/af_vsock.c@@ -1066,8 +1066,9 @@ static __poll_t vsock_poll(struct file *file, struct socket *sock, if (transport && transport->stream_is_active(vsk) && !(sk->sk_shutdown & RCV_SHUTDOWN)) { bool data_ready_now = false; + int target = sock_rcvlowat(sk, 0, INT_MAX); int ret = transport->notify_poll_in( - vsk, 1, &data_ready_now); + vsk, target, &data_ready_now); if (ret < 0) { mask |= EPOLLERR; } else {
--
2.25.1