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vsock: pass sock_rcvlowat to notify_poll_in as target 

Passing 1 as the target to notify_poll_in(), we don't honor
what the user has set via SO_RCVLOWAT, going to set POLLIN
and POLLRDNORM, even if we don't have the amount of bytes
expected by the user.

Let's use sock_rcvlowat() to get the right target to pass to
notify_poll_in();

Signed-off-by: Arseniy Krasnov <AVKrasnov@sberdevices.ru>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
This commit is contained in:
Arseniy Krasnov 2022-08-19 05:33:47 +00:00 committed by Paolo Abeni
parent a274f6ff3c
commit ee0b3843a2
1 changed files with 2 additions and 1 deletions
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3
net/vmw_vsock/af_vsock.c
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@ -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 {