diff options
| author | Arseniy Krasnov <AVKrasnov@sberdevices.ru> | 2022-08-19 08:25:19 +0300 |
|---|---|---|
| committer | Paolo Abeni <pabeni@redhat.com> | 2022-08-23 11:43:11 +0300 |
| commit | e38f22c860edb7804b4722ac2332f7c51b9c6b72 (patch) | |
| tree | af615d134e2c0f6059ae07d70bcf91d1a87ca79a /net/vmw_vsock | |
| parent | ab4850819176a92864f6ebd6c932ed926a337054 (diff) | |
| download | linux-e38f22c860edb7804b4722ac2332f7c51b9c6b72.tar.xz | |
vsock: SO_RCVLOWAT transport set callback
This adds transport specific callback for SO_RCVLOWAT, because in some
transports it may be difficult to know current available number of bytes
ready to read. Thus, when SO_RCVLOWAT is set, transport may reject it.
Signed-off-by: Arseniy Krasnov <AVKrasnov@sberdevices.ru>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Diffstat (limited to 'net/vmw_vsock')
| -rw-r--r-- | net/vmw_vsock/af_vsock.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/net/vmw_vsock/af_vsock.c b/net/vmw_vsock/af_vsock.c index b4ee163154a6..07c8f74a821f 100644 --- a/net/vmw_vsock/af_vsock.c +++ b/net/vmw_vsock/af_vsock.c @@ -2137,6 +2137,25 @@ out: return err; } +static int vsock_set_rcvlowat(struct sock *sk, int val) +{ + const struct vsock_transport *transport; + struct vsock_sock *vsk; + + vsk = vsock_sk(sk); + + if (val > vsk->buffer_size) + return -EINVAL; + + transport = vsk->transport; + + if (transport && transport->set_rcvlowat) + return transport->set_rcvlowat(vsk, val); + + WRITE_ONCE(sk->sk_rcvlowat, val ? : 1); + return 0; +} + static const struct proto_ops vsock_stream_ops = { .family = PF_VSOCK, .owner = THIS_MODULE, @@ -2156,6 +2175,7 @@ static const struct proto_ops vsock_stream_ops = { .recvmsg = vsock_connectible_recvmsg, .mmap = sock_no_mmap, .sendpage = sock_no_sendpage, + .set_rcvlowat = vsock_set_rcvlowat, }; static const struct proto_ops vsock_seqpacket_ops = { |