VSOCK: use TCP state constants for sk_state

There are two state fields: socket->state and sock->sk_state.  The
socket->state field uses SS_UNCONNECTED, SS_CONNECTED, etc while the
sock->sk_state typically uses values that match TCP state constants
(TCP_CLOSE, TCP_ESTABLISHED).  AF_VSOCK does not follow this convention
and instead uses SS_* constants for both fields.

The sk_state field will be exposed to userspace through the vsock_diag
interface for ss(8), netstat(8), and other programs.

This patch switches sk_state to TCP state constants so that the meaning
of this field is consistent with other address families.  Not just
AF_INET and AF_INET6 use the TCP constants, AF_UNIX and others do too.

The following mapping was used to convert the code:

  SS_FREE -> TCP_CLOSE
  SS_UNCONNECTED -> TCP_CLOSE
  SS_CONNECTING -> TCP_SYN_SENT
  SS_CONNECTED -> TCP_ESTABLISHED
  SS_DISCONNECTING -> TCP_CLOSING
  VSOCK_SS_LISTEN -> TCP_LISTEN

In __vsock_create() the sk_state initialization was dropped because
sock_init_data() already initializes sk_state to TCP_CLOSE.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/include/net/af_vsock.h b/include/net/af_vsock.h
index 3dd2177..9324ac2 100644 (file)
--- a/include/net/af_vsock.h
+++ b/include/net/af_vsock.h
@@ -22,9 +22,6 @@
 
 #include "vsock_addr.h"
 
-/* vsock-specific sock->sk_state constants */
-#define VSOCK_SS_LISTEN 255
-
 #define LAST_RESERVED_PORT 1023
 
 #define VSOCK_HASH_SIZE         251

diff --git a/net/vmw_vsock/af_vsock.c b/net/vmw_vsock/af_vsock.c
index 9b179a0..98359c1 100644 (file)
--- a/net/vmw_vsock/af_vsock.c
+++ b/net/vmw_vsock/af_vsock.c
@@ -36,7 +36,7 @@
  * not support simultaneous connects (two "client" sockets connecting).
  *
  * - "Server" sockets are referred to as listener sockets throughout this
- * implementation because they are in the VSOCK_SS_LISTEN state.  When a
+ * implementation because they are in the TCP_LISTEN state.  When a
  * connection request is received (the second kind of socket mentioned above),
  * we create a new socket and refer to it as a pending socket.  These pending
  * sockets are placed on the pending connection list of the listener socket.
@@ -82,6 +82,15 @@
  * argument, we must ensure the reference count is increased to ensure the
  * socket isn't freed before the function is run; the deferred function will
  * then drop the reference.
+ *
+ * - sk->sk_state uses the TCP state constants because they are widely used by
+ * other address families and exposed to userspace tools like ss(8):
+ *
+ *   TCP_CLOSE - unconnected
+ *   TCP_SYN_SENT - connecting
+ *   TCP_ESTABLISHED - connected
+ *   TCP_CLOSING - disconnecting
+ *   TCP_LISTEN - listening
  */
 
 #include <linux/types.h>
@@ -477,7 +486,7 @@ void vsock_pending_work(struct work_struct *work)
        if (vsock_in_connected_table(vsk))
                vsock_remove_connected(vsk);
 
-       sk->sk_state = SS_FREE;
+       sk->sk_state = TCP_CLOSE;
 
 out:
        release_sock(sk);
@@ -617,7 +626,6 @@ struct sock *__vsock_create(struct net *net,
 
        sk->sk_destruct = vsock_sk_destruct;
        sk->sk_backlog_rcv = vsock_queue_rcv_skb;
-       sk->sk_state = 0;
        sock_reset_flag(sk, SOCK_DONE);
 
        INIT_LIST_HEAD(&vsk->bound_table);
@@ -891,7 +899,7 @@ static unsigned int vsock_poll(struct file *file, struct socket *sock,
                /* Listening sockets that have connections in their accept
                 * queue can be read.
                 */
-               if (sk->sk_state == VSOCK_SS_LISTEN
+               if (sk->sk_state == TCP_LISTEN
                    && !vsock_is_accept_queue_empty(sk))
                        mask |= POLLIN | POLLRDNORM;
 
@@ -920,7 +928,7 @@ static unsigned int vsock_poll(struct file *file, struct socket *sock,
                }
 
                /* Connected sockets that can produce data can be written. */
-               if (sk->sk_state == SS_CONNECTED) {
+               if (sk->sk_state == TCP_ESTABLISHED) {
                        if (!(sk->sk_shutdown & SEND_SHUTDOWN)) {
                                bool space_avail_now = false;
                                int ret = transport->notify_poll_out(
@@ -942,7 +950,7 @@ static unsigned int vsock_poll(struct file *file, struct socket *sock,
                 * POLLOUT|POLLWRNORM when peer is closed and nothing to read,
                 * but local send is not shutdown.
                 */
-               if (sk->sk_state == SS_UNCONNECTED) {
+               if (sk->sk_state == TCP_CLOSE) {
                        if (!(sk->sk_shutdown & SEND_SHUTDOWN))
                                mask |= POLLOUT | POLLWRNORM;
 
@@ -1112,9 +1120,9 @@ static void vsock_connect_timeout(struct work_struct *work)
        sk = sk_vsock(vsk);
 
        lock_sock(sk);
-       if (sk->sk_state == SS_CONNECTING &&
+       if (sk->sk_state == TCP_SYN_SENT &&
            (sk->sk_shutdown != SHUTDOWN_MASK)) {
-               sk->sk_state = SS_UNCONNECTED;
+               sk->sk_state = TCP_CLOSE;
                sk->sk_err = ETIMEDOUT;
                sk->sk_error_report(sk);
                cancel = 1;
@@ -1160,7 +1168,7 @@ static int vsock_stream_connect(struct socket *sock, struct sockaddr *addr,
                err = -EALREADY;
                break;
        default:
-               if ((sk->sk_state == VSOCK_SS_LISTEN) ||
+               if ((sk->sk_state == TCP_LISTEN) ||
                    vsock_addr_cast(addr, addr_len, &remote_addr) != 0) {
                        err = -EINVAL;
                        goto out;
@@ -1183,7 +1191,7 @@ static int vsock_stream_connect(struct socket *sock, struct sockaddr *addr,
                if (err)
                        goto out;
 
-               sk->sk_state = SS_CONNECTING;
+               sk->sk_state = TCP_SYN_SENT;
 
                err = transport->connect(vsk);
                if (err < 0)
@@ -1203,7 +1211,7 @@ static int vsock_stream_connect(struct socket *sock, struct sockaddr *addr,
        timeout = vsk->connect_timeout;
        prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
 
-       while (sk->sk_state != SS_CONNECTED && sk->sk_err == 0) {
+       while (sk->sk_state != TCP_ESTABLISHED && sk->sk_err == 0) {
                if (flags & O_NONBLOCK) {
                        /* If we're not going to block, we schedule a timeout
                         * function to generate a timeout on the connection
@@ -1226,13 +1234,13 @@ static int vsock_stream_connect(struct socket *sock, struct sockaddr *addr,
 
                if (signal_pending(current)) {
                        err = sock_intr_errno(timeout);
-                       sk->sk_state = SS_UNCONNECTED;
+                       sk->sk_state = TCP_CLOSE;
                        sock->state = SS_UNCONNECTED;
                        vsock_transport_cancel_pkt(vsk);
                        goto out_wait;
                } else if (timeout == 0) {
                        err = -ETIMEDOUT;
-                       sk->sk_state = SS_UNCONNECTED;
+                       sk->sk_state = TCP_CLOSE;
                        sock->state = SS_UNCONNECTED;
                        vsock_transport_cancel_pkt(vsk);
                        goto out_wait;
@@ -1243,7 +1251,7 @@ static int vsock_stream_connect(struct socket *sock, struct sockaddr *addr,
 
        if (sk->sk_err) {
                err = -sk->sk_err;
-               sk->sk_state = SS_UNCONNECTED;
+               sk->sk_state = TCP_CLOSE;
                sock->state = SS_UNCONNECTED;
        } else {
                err = 0;
@@ -1276,7 +1284,7 @@ static int vsock_accept(struct socket *sock, struct socket *newsock, int flags,
                goto out;
        }
 
-       if (listener->sk_state != VSOCK_SS_LISTEN) {
+       if (listener->sk_state != TCP_LISTEN) {
                err = -EINVAL;
                goto out;
        }
@@ -1366,7 +1374,7 @@ static int vsock_listen(struct socket *sock, int backlog)
        }
 
        sk->sk_max_ack_backlog = backlog;
-       sk->sk_state = VSOCK_SS_LISTEN;
+       sk->sk_state = TCP_LISTEN;
 
        err = 0;
 
@@ -1546,7 +1554,7 @@ static int vsock_stream_sendmsg(struct socket *sock, struct msghdr *msg,
 
        /* Callers should not provide a destination with stream sockets. */
        if (msg->msg_namelen) {
-               err = sk->sk_state == SS_CONNECTED ? -EISCONN : -EOPNOTSUPP;
+               err = sk->sk_state == TCP_ESTABLISHED ? -EISCONN : -EOPNOTSUPP;
                goto out;
        }
 
@@ -1557,7 +1565,7 @@ static int vsock_stream_sendmsg(struct socket *sock, struct msghdr *msg,
                goto out;
        }
 
-       if (sk->sk_state != SS_CONNECTED ||
+       if (sk->sk_state != TCP_ESTABLISHED ||
            !vsock_addr_bound(&vsk->local_addr)) {
                err = -ENOTCONN;
                goto out;
@@ -1681,7 +1689,7 @@ vsock_stream_recvmsg(struct socket *sock, struct msghdr *msg, size_t len,
 
        lock_sock(sk);
 
-       if (sk->sk_state != SS_CONNECTED) {
+       if (sk->sk_state != TCP_ESTABLISHED) {
                /* Recvmsg is supposed to return 0 if a peer performs an
                 * orderly shutdown. Differentiate between that case and when a
                 * peer has not connected or a local shutdown occured with the

diff --git a/net/vmw_vsock/hyperv_transport.c b/net/vmw_vsock/hyperv_transport.c
index 14ed5a3..bbac023 100644 (file)
--- a/net/vmw_vsock/hyperv_transport.c
+++ b/net/vmw_vsock/hyperv_transport.c
@@ -310,7 +310,7 @@ static void hvs_close_connection(struct vmbus_channel *chan)
        struct sock *sk = get_per_channel_state(chan);
        struct vsock_sock *vsk = vsock_sk(sk);
 
-       sk->sk_state = SS_UNCONNECTED;
+       sk->sk_state = TCP_CLOSE;
        sock_set_flag(sk, SOCK_DONE);
        vsk->peer_shutdown |= SEND_SHUTDOWN | RCV_SHUTDOWN;
 
@@ -344,8 +344,8 @@ static void hvs_open_connection(struct vmbus_channel *chan)
        if (!sk)
                return;
 
-       if ((conn_from_host && sk->sk_state != VSOCK_SS_LISTEN) ||
-           (!conn_from_host && sk->sk_state != SS_CONNECTING))
+       if ((conn_from_host && sk->sk_state != TCP_LISTEN) ||
+           (!conn_from_host && sk->sk_state != TCP_SYN_SENT))
                goto out;
 
        if (conn_from_host) {
@@ -357,7 +357,7 @@ static void hvs_open_connection(struct vmbus_channel *chan)
                if (!new)
                        goto out;
 
-               new->sk_state = SS_CONNECTING;
+               new->sk_state = TCP_SYN_SENT;
                vnew = vsock_sk(new);
                hvs_new = vnew->trans;
                hvs_new->chan = chan;
@@ -384,7 +384,7 @@ static void hvs_open_connection(struct vmbus_channel *chan)
        vmbus_set_chn_rescind_callback(chan, hvs_close_connection);
 
        if (conn_from_host) {
-               new->sk_state = SS_CONNECTED;
+               new->sk_state = TCP_ESTABLISHED;
                sk->sk_ack_backlog++;
 
                hvs_addr_init(&vnew->local_addr, if_type);
@@ -399,7 +399,7 @@ static void hvs_open_connection(struct vmbus_channel *chan)
                vsock_enqueue_accept(sk, new);
                release_sock(sk);
        } else {
-               sk->sk_state = SS_CONNECTED;
+               sk->sk_state = TCP_ESTABLISHED;
                sk->sk_socket->state = SS_CONNECTED;
 
                vsock_insert_connected(vsock_sk(sk));

diff --git a/net/vmw_vsock/virtio_transport.c b/net/vmw_vsock/virtio_transport.c
index 403d86e..8e03bd3 100644 (file)
--- a/net/vmw_vsock/virtio_transport.c
+++ b/net/vmw_vsock/virtio_transport.c
@@ -414,7 +414,7 @@ static void virtio_vsock_event_fill(struct virtio_vsock *vsock)
 static void virtio_vsock_reset_sock(struct sock *sk)
 {
        lock_sock(sk);
-       sk->sk_state = SS_UNCONNECTED;
+       sk->sk_state = TCP_CLOSE;
        sk->sk_err = ECONNRESET;
        sk->sk_error_report(sk);
        release_sock(sk);

diff --git a/net/vmw_vsock/virtio_transport_common.c b/net/vmw_vsock/virtio_transport_common.c
index edba7ab..3ae3a33 100644 (file)
--- a/net/vmw_vsock/virtio_transport_common.c
+++ b/net/vmw_vsock/virtio_transport_common.c
@@ -708,7 +708,7 @@ static void virtio_transport_do_close(struct vsock_sock *vsk,
        sock_set_flag(sk, SOCK_DONE);
        vsk->peer_shutdown = SHUTDOWN_MASK;
        if (vsock_stream_has_data(vsk) <= 0)
-               sk->sk_state = SS_DISCONNECTING;
+               sk->sk_state = TCP_CLOSING;
        sk->sk_state_change(sk);
 
        if (vsk->close_work_scheduled &&
@@ -748,8 +748,8 @@ static bool virtio_transport_close(struct vsock_sock *vsk)
 {
        struct sock *sk = &vsk->sk;
 
-       if (!(sk->sk_state == SS_CONNECTED ||
-             sk->sk_state == SS_DISCONNECTING))
+       if (!(sk->sk_state == TCP_ESTABLISHED ||
+             sk->sk_state == TCP_CLOSING))
                return true;
 
        /* Already received SHUTDOWN from peer, reply with RST */
@@ -801,7 +801,7 @@ virtio_transport_recv_connecting(struct sock *sk,
 
        switch (le16_to_cpu(pkt->hdr.op)) {
        case VIRTIO_VSOCK_OP_RESPONSE:
-               sk->sk_state = SS_CONNECTED;
+               sk->sk_state = TCP_ESTABLISHED;
                sk->sk_socket->state = SS_CONNECTED;
                vsock_insert_connected(vsk);
                sk->sk_state_change(sk);
@@ -821,7 +821,7 @@ virtio_transport_recv_connecting(struct sock *sk,
 
 destroy:
        virtio_transport_reset(vsk, pkt);
-       sk->sk_state = SS_UNCONNECTED;
+       sk->sk_state = TCP_CLOSE;
        sk->sk_err = skerr;
        sk->sk_error_report(sk);
        return err;
@@ -857,7 +857,7 @@ virtio_transport_recv_connected(struct sock *sk,
                        vsk->peer_shutdown |= SEND_SHUTDOWN;
                if (vsk->peer_shutdown == SHUTDOWN_MASK &&
                    vsock_stream_has_data(vsk) <= 0)
-                       sk->sk_state = SS_DISCONNECTING;
+                       sk->sk_state = TCP_CLOSING;
                if (le32_to_cpu(pkt->hdr.flags))
                        sk->sk_state_change(sk);
                break;
@@ -928,7 +928,7 @@ virtio_transport_recv_listen(struct sock *sk, struct virtio_vsock_pkt *pkt)
 
        lock_sock_nested(child, SINGLE_DEPTH_NESTING);
 
-       child->sk_state = SS_CONNECTED;
+       child->sk_state = TCP_ESTABLISHED;
 
        vchild = vsock_sk(child);
        vsock_addr_init(&vchild->local_addr, le64_to_cpu(pkt->hdr.dst_cid),
@@ -1016,18 +1016,18 @@ void virtio_transport_recv_pkt(struct virtio_vsock_pkt *pkt)
                sk->sk_write_space(sk);
 
        switch (sk->sk_state) {
-       case VSOCK_SS_LISTEN:
+       case TCP_LISTEN:
                virtio_transport_recv_listen(sk, pkt);
                virtio_transport_free_pkt(pkt);
                break;
-       case SS_CONNECTING:
+       case TCP_SYN_SENT:
                virtio_transport_recv_connecting(sk, pkt);
                virtio_transport_free_pkt(pkt);
                break;
-       case SS_CONNECTED:
+       case TCP_ESTABLISHED:
                virtio_transport_recv_connected(sk, pkt);
                break;
-       case SS_DISCONNECTING:
+       case TCP_CLOSING:
                virtio_transport_recv_disconnecting(sk, pkt);
                virtio_transport_free_pkt(pkt);
                break;

diff --git a/net/vmw_vsock/vmci_transport.c b/net/vmw_vsock/vmci_transport.c
index 0206155..391775e 100644 (file)
--- a/net/vmw_vsock/vmci_transport.c
+++ b/net/vmw_vsock/vmci_transport.c
@@ -742,7 +742,7 @@ static int vmci_transport_recv_stream_cb(void *data, struct vmci_datagram *dg)
                /* The local context ID may be out of date, update it. */
                vsk->local_addr.svm_cid = dst.svm_cid;
 
-               if (sk->sk_state == SS_CONNECTED)
+               if (sk->sk_state == TCP_ESTABLISHED)
                        vmci_trans(vsk)->notify_ops->handle_notify_pkt(
                                        sk, pkt, true, &dst, &src,
                                        &bh_process_pkt);
@@ -800,7 +800,9 @@ static void vmci_transport_handle_detach(struct sock *sk)
                 * left in our consume queue.
                 */
                if (vsock_stream_has_data(vsk) <= 0) {
-                       if (sk->sk_state == SS_CONNECTING) {
+                       sk->sk_state = TCP_CLOSE;
+
+                       if (sk->sk_state == TCP_SYN_SENT) {
                                /* The peer may detach from a queue pair while
                                 * we are still in the connecting state, i.e.,
                                 * if the peer VM is killed after attaching to
@@ -809,12 +811,10 @@ static void vmci_transport_handle_detach(struct sock *sk)
                                 * event like a reset.
                                 */
 
-                               sk->sk_state = SS_UNCONNECTED;
                                sk->sk_err = ECONNRESET;
                                sk->sk_error_report(sk);
                                return;
                        }
-                       sk->sk_state = SS_UNCONNECTED;
                }
                sk->sk_state_change(sk);
        }
@@ -882,17 +882,17 @@ static void vmci_transport_recv_pkt_work(struct work_struct *work)
        vsock_sk(sk)->local_addr.svm_cid = pkt->dg.dst.context;
 
        switch (sk->sk_state) {
-       case VSOCK_SS_LISTEN:
+       case TCP_LISTEN:
                vmci_transport_recv_listen(sk, pkt);
                break;
-       case SS_CONNECTING:
+       case TCP_SYN_SENT:
                /* Processing of pending connections for servers goes through
                 * the listening socket, so see vmci_transport_recv_listen()
                 * for that path.
                 */
                vmci_transport_recv_connecting_client(sk, pkt);
                break;
-       case SS_CONNECTED:
+       case TCP_ESTABLISHED:
                vmci_transport_recv_connected(sk, pkt);
                break;
        default:
@@ -941,7 +941,7 @@ static int vmci_transport_recv_listen(struct sock *sk,
                vsock_sk(pending)->local_addr.svm_cid = pkt->dg.dst.context;
 
                switch (pending->sk_state) {
-               case SS_CONNECTING:
+               case TCP_SYN_SENT:
                        err = vmci_transport_recv_connecting_server(sk,
                                                                    pending,
                                                                    pkt);
@@ -1071,7 +1071,7 @@ static int vmci_transport_recv_listen(struct sock *sk,
        vsock_add_pending(sk, pending);
        sk->sk_ack_backlog++;
 
-       pending->sk_state = SS_CONNECTING;
+       pending->sk_state = TCP_SYN_SENT;
        vmci_trans(vpending)->produce_size =
                vmci_trans(vpending)->consume_size = qp_size;
        vmci_trans(vpending)->queue_pair_size = qp_size;
@@ -1196,11 +1196,11 @@ vmci_transport_recv_connecting_server(struct sock *listener,
         * the socket will be valid until it is removed from the queue.
         *
         * If we fail sending the attach below, we remove the socket from the
-        * connected list and move the socket to SS_UNCONNECTED before
+        * connected list and move the socket to TCP_CLOSE before
         * releasing the lock, so a pending slow path processing of an incoming
         * packet will not see the socket in the connected state in that case.
         */
-       pending->sk_state = SS_CONNECTED;
+       pending->sk_state = TCP_ESTABLISHED;
 
        vsock_insert_connected(vpending);
 
@@ -1231,7 +1231,7 @@ vmci_transport_recv_connecting_server(struct sock *listener,
 
 destroy:
        pending->sk_err = skerr;
-       pending->sk_state = SS_UNCONNECTED;
+       pending->sk_state = TCP_CLOSE;
        /* As long as we drop our reference, all necessary cleanup will handle
         * when the cleanup function drops its reference and our destruct
         * implementation is called.  Note that since the listen handler will
@@ -1269,7 +1269,7 @@ vmci_transport_recv_connecting_client(struct sock *sk,
                 * accounting (it can already be found since it's in the bound
                 * table).
                 */
-               sk->sk_state = SS_CONNECTED;
+               sk->sk_state = TCP_ESTABLISHED;
                sk->sk_socket->state = SS_CONNECTED;
                vsock_insert_connected(vsk);
                sk->sk_state_change(sk);
@@ -1337,7 +1337,7 @@ vmci_transport_recv_connecting_client(struct sock *sk,
 destroy:
        vmci_transport_send_reset(sk, pkt);
 
-       sk->sk_state = SS_UNCONNECTED;
+       sk->sk_state = TCP_CLOSE;
        sk->sk_err = skerr;
        sk->sk_error_report(sk);
        return err;
@@ -1525,7 +1525,7 @@ static int vmci_transport_recv_connected(struct sock *sk,
                sock_set_flag(sk, SOCK_DONE);
                vsk->peer_shutdown = SHUTDOWN_MASK;
                if (vsock_stream_has_data(vsk) <= 0)
-                       sk->sk_state = SS_DISCONNECTING;
+                       sk->sk_state = TCP_CLOSING;
 
                sk->sk_state_change(sk);
                break;
@@ -1789,7 +1789,7 @@ static int vmci_transport_connect(struct vsock_sock *vsk)
                err = vmci_transport_send_conn_request(
                        sk, vmci_trans(vsk)->queue_pair_size);
                if (err < 0) {
-                       sk->sk_state = SS_UNCONNECTED;
+                       sk->sk_state = TCP_CLOSE;
                        return err;
                }
        } else {
@@ -1799,7 +1799,7 @@ static int vmci_transport_connect(struct vsock_sock *vsk)
                                sk, vmci_trans(vsk)->queue_pair_size,
                                supported_proto_versions);
                if (err < 0) {
-                       sk->sk_state = SS_UNCONNECTED;
+                       sk->sk_state = TCP_CLOSE;
                        return err;
                }
 

diff --git a/net/vmw_vsock/vmci_transport_notify.c b/net/vmw_vsock/vmci_transport_notify.c
index 1406db4..41fb427 100644 (file)
--- a/net/vmw_vsock/vmci_transport_notify.c
+++ b/net/vmw_vsock/vmci_transport_notify.c
@@ -355,7 +355,7 @@ vmci_transport_notify_pkt_poll_in(struct sock *sk,
                 * queue. Ask for notifications when there is something to
                 * read.
                 */
-               if (sk->sk_state == SS_CONNECTED) {
+               if (sk->sk_state == TCP_ESTABLISHED) {
                        if (!send_waiting_read(sk, 1))
                                return -1;
 

diff --git a/net/vmw_vsock/vmci_transport_notify_qstate.c b/net/vmw_vsock/vmci_transport_notify_qstate.c
index f3a0afc..0cc84f2 100644 (file)
--- a/net/vmw_vsock/vmci_transport_notify_qstate.c
+++ b/net/vmw_vsock/vmci_transport_notify_qstate.c
@@ -176,7 +176,7 @@ vmci_transport_notify_pkt_poll_in(struct sock *sk,
                 * queue. Ask for notifications when there is something to
                 * read.
                 */
-               if (sk->sk_state == SS_CONNECTED)
+               if (sk->sk_state == TCP_ESTABLISHED)
                        vsock_block_update_write_window(sk);
                *data_ready_now = false;
        }