[PATCH 3/3] vsock: support for SOCK_SEQPACKET socket.
From: Arseny Krasnov
Date: Tue Dec 29 2020 - 06:18:47 EST
1) Add socket ops for SOCK_SEQPACKET type.
2) For receive, create another loop. It looks like
stream receive loop, but it doesn't call notify
callbacks, it doesn't care about 'SO_SNDLOWAT' and
'SO_RCVLOWAT' values, it waits until whole record is
received or error in found during receiving and it takes
care about 'MSG_TRUNC' flag.
3) Update some comments('stream' -> 'connect oriented').
Signed-off-by: Arseny Krasnov <arseny.krasnov@xxxxxxxxxxxxx>
---
net/vmw_vsock/af_vsock.c | 460 +++++++++++++++++++++++++++++++--------
1 file changed, 366 insertions(+), 94 deletions(-)
diff --git a/net/vmw_vsock/af_vsock.c b/net/vmw_vsock/af_vsock.c
index b12d3a322242..be488d1a1fc7 100644
--- a/net/vmw_vsock/af_vsock.c
+++ b/net/vmw_vsock/af_vsock.c
@@ -415,8 +415,8 @@ static void vsock_deassign_transport(struct vsock_sock *vsk)
/* Assign a transport to a socket and call the .init transport callback.
*
- * Note: for stream socket this must be called when vsk->remote_addr is set
- * (e.g. during the connect() or when a connection request on a listener
+ * Note: for connect oriented socket this must be called when vsk->remote_addr
+ * is set (e.g. during the connect() or when a connection request on a listener
* socket is received).
* The vsk->remote_addr is used to decide which transport to use:
* - remote CID == VMADDR_CID_LOCAL or g2h->local_cid or VMADDR_CID_HOST if
@@ -452,6 +452,7 @@ int vsock_assign_transport(struct vsock_sock *vsk, struct vsock_sock *psk)
new_transport = transport_dgram;
break;
case SOCK_STREAM:
+ case SOCK_SEQPACKET:
if (vsock_use_local_transport(remote_cid))
new_transport = transport_local;
else if (remote_cid <= VMADDR_CID_HOST || !transport_h2g ||
@@ -459,6 +460,12 @@ int vsock_assign_transport(struct vsock_sock *vsk, struct vsock_sock *psk)
new_transport = transport_g2h;
else
new_transport = transport_h2g;
+
+ if (sk->sk_type == SOCK_SEQPACKET) {
+ if (!new_transport->seqpacket_seq_send_len ||
+ !new_transport->seqpacket_seq_get_len)
+ return -ENODEV;
+ }
break;
default:
return -ESOCKTNOSUPPORT;
@@ -469,10 +476,10 @@ int vsock_assign_transport(struct vsock_sock *vsk, struct vsock_sock *psk)
return 0;
/* transport->release() must be called with sock lock acquired.
- * This path can only be taken during vsock_stream_connect(),
- * where we have already held the sock lock.
- * In the other cases, this function is called on a new socket
- * which is not assigned to any transport.
+ * This path can only be taken during vsock_connect(), where we
+ * have already held the sock lock. In the other cases, this
+ * function is called on a new socket which is not assigned to
+ * any transport.
*/
vsk->transport->release(vsk);
vsock_deassign_transport(vsk);
@@ -604,8 +611,8 @@ static void vsock_pending_work(struct work_struct *work)
/**** SOCKET OPERATIONS ****/
-static int __vsock_bind_stream(struct vsock_sock *vsk,
- struct sockaddr_vm *addr)
+static int __vsock_bind_connectible(struct vsock_sock *vsk,
+ struct sockaddr_vm *addr)
{
static u32 port;
struct sockaddr_vm new_addr;
@@ -649,9 +656,10 @@ static int __vsock_bind_stream(struct vsock_sock *vsk,
vsock_addr_init(&vsk->local_addr, new_addr.svm_cid, new_addr.svm_port);
- /* Remove stream sockets from the unbound list and add them to the hash
- * table for easy lookup by its address. The unbound list is simply an
- * extra entry at the end of the hash table, a trick used by AF_UNIX.
+ /* Remove connect oriented sockets from the unbound list and add them
+ * to the hash table for easy lookup by its address. The unbound list
+ * is simply an extra entry at the end of the hash table, a trick used
+ * by AF_UNIX.
*/
__vsock_remove_bound(vsk);
__vsock_insert_bound(vsock_bound_sockets(&vsk->local_addr), vsk);
@@ -684,8 +692,9 @@ static int __vsock_bind(struct sock *sk, struct sockaddr_vm *addr)
switch (sk->sk_socket->type) {
case SOCK_STREAM:
+ case SOCK_SEQPACKET:
spin_lock_bh(&vsock_table_lock);
- retval = __vsock_bind_stream(vsk, addr);
+ retval = __vsock_bind_connectible(vsk, addr);
spin_unlock_bh(&vsock_table_lock);
break;
@@ -767,6 +776,11 @@ static struct sock *__vsock_create(struct net *net,
return sk;
}
+static bool sock_type_connectible(u16 type)
+{
+ return (type == SOCK_STREAM || type == SOCK_SEQPACKET);
+}
+
static void __vsock_release(struct sock *sk, int level)
{
if (sk) {
@@ -785,7 +799,7 @@ static void __vsock_release(struct sock *sk, int level)
if (vsk->transport)
vsk->transport->release(vsk);
- else if (sk->sk_type == SOCK_STREAM)
+ else if (sock_type_connectible(sk->sk_type))
vsock_remove_sock(vsk);
sock_orphan(sk);
@@ -936,16 +950,16 @@ static int vsock_shutdown(struct socket *sock, int mode)
if ((mode & ~SHUTDOWN_MASK) || !mode)
return -EINVAL;
- /* If this is a STREAM socket and it is not connected then bail out
- * immediately. If it is a DGRAM socket then we must first kick the
- * socket so that it wakes up from any sleeping calls, for example
- * recv(), and then afterwards return the error.
+ /* If this is a connect oriented socket and it is not connected then
+ * bail out immediately. If it is a DGRAM socket then we must first
+ * kick the socket so that it wakes up from any sleeping calls, for
+ * example recv(), and then afterwards return the error.
*/
sk = sock->sk;
if (sock->state == SS_UNCONNECTED) {
err = -ENOTCONN;
- if (sk->sk_type == SOCK_STREAM)
+ if (sock_type_connectible(sk->sk_type))
return err;
} else {
sock->state = SS_DISCONNECTING;
@@ -960,7 +974,7 @@ static int vsock_shutdown(struct socket *sock, int mode)
sk->sk_state_change(sk);
release_sock(sk);
- if (sk->sk_type == SOCK_STREAM) {
+ if (sock_type_connectible(sk->sk_type)) {
sock_reset_flag(sk, SOCK_DONE);
vsock_send_shutdown(sk, mode);
}
@@ -1013,7 +1027,7 @@ static __poll_t vsock_poll(struct file *file, struct socket *sock,
if (!(sk->sk_shutdown & SEND_SHUTDOWN))
mask |= EPOLLOUT | EPOLLWRNORM | EPOLLWRBAND;
- } else if (sock->type == SOCK_STREAM) {
+ } else if (sock_type_connectible(sk->sk_type)) {
const struct vsock_transport *transport = vsk->transport;
lock_sock(sk);
@@ -1259,8 +1273,8 @@ static void vsock_connect_timeout(struct work_struct *work)
sock_put(sk);
}
-static int vsock_stream_connect(struct socket *sock, struct sockaddr *addr,
- int addr_len, int flags)
+static int vsock_connect(struct socket *sock, struct sockaddr *addr,
+ int addr_len, int flags)
{
int err;
struct sock *sk;
@@ -1410,7 +1424,7 @@ static int vsock_accept(struct socket *sock, struct socket *newsock, int flags,
lock_sock(listener);
- if (sock->type != SOCK_STREAM) {
+ if (!sock_type_connectible(sock->type)) {
err = -EOPNOTSUPP;
goto out;
}
@@ -1477,6 +1491,18 @@ static int vsock_accept(struct socket *sock, struct socket *newsock, int flags,
return err;
}
+static int vsock_stream_connect(struct socket *sock, struct sockaddr *addr,
+ int addr_len, int flags)
+{
+ return vsock_connect(sock, addr, addr_len, flags);
+}
+
+static int vsock_seqpacket_connect(struct socket *sock, struct sockaddr *addr,
+ int addr_len, int flags)
+{
+ return vsock_connect(sock, addr, addr_len, flags);
+}
+
static int vsock_listen(struct socket *sock, int backlog)
{
int err;
@@ -1487,7 +1513,7 @@ static int vsock_listen(struct socket *sock, int backlog)
lock_sock(sk);
- if (sock->type != SOCK_STREAM) {
+ if (!sock_type_connectible(sk->sk_type)) {
err = -EOPNOTSUPP;
goto out;
}
@@ -1531,11 +1557,11 @@ static void vsock_update_buffer_size(struct vsock_sock *vsk,
vsk->buffer_size = val;
}
-static int vsock_stream_setsockopt(struct socket *sock,
- int level,
- int optname,
- sockptr_t optval,
- unsigned int optlen)
+static int vsock_setsockopt(struct socket *sock,
+ int level,
+ int optname,
+ sockptr_t optval,
+ unsigned int optlen)
{
int err;
struct sock *sk;
@@ -1612,6 +1638,24 @@ static int vsock_stream_setsockopt(struct socket *sock,
return err;
}
+static int vsock_seqpacket_setsockopt(struct socket *sock,
+ int level,
+ int optname,
+ sockptr_t optval,
+ unsigned int optlen)
+{
+ return vsock_setsockopt(sock, level, optname, optval, optlen);
+}
+
+static int vsock_stream_setsockopt(struct socket *sock,
+ int level,
+ int optname,
+ sockptr_t optval,
+ unsigned int optlen)
+{
+ return vsock_setsockopt(sock, level, optname, optval, optlen);
+}
+
static int vsock_stream_getsockopt(struct socket *sock,
int level, int optname,
char __user *optval,
@@ -1683,8 +1727,16 @@ static int vsock_stream_getsockopt(struct socket *sock,
return 0;
}
-static int vsock_stream_sendmsg(struct socket *sock, struct msghdr *msg,
- size_t len)
+static int vsock_seqpacket_getsockopt(struct socket *sock,
+ int level, int optname,
+ char __user *optval,
+ int __user *optlen)
+{
+ return vsock_stream_getsockopt(sock, level, optname, optval, optlen);
+}
+
+static int vsock_connectible_sendmsg(struct socket *sock, struct msghdr *msg,
+ size_t len)
{
struct sock *sk;
struct vsock_sock *vsk;
@@ -1706,7 +1758,9 @@ static int vsock_stream_sendmsg(struct socket *sock, struct msghdr *msg,
lock_sock(sk);
- /* Callers should not provide a destination with stream sockets. */
+ /* Callers should not provide a destination with connect oriented
+ * sockets.
+ */
if (msg->msg_namelen) {
err = sk->sk_state == TCP_ESTABLISHED ? -EISCONN : -EOPNOTSUPP;
goto out;
@@ -1737,6 +1791,12 @@ static int vsock_stream_sendmsg(struct socket *sock, struct msghdr *msg,
if (err < 0)
goto out;
+ if (sk->sk_type == SOCK_SEQPACKET) {
+ err = transport->seqpacket_seq_send_len(vsk, len);
+ if (err < 0)
+ goto out;
+ }
+
while (total_written < len) {
ssize_t written;
@@ -1796,10 +1856,8 @@ static int vsock_stream_sendmsg(struct socket *sock, struct msghdr *msg,
* smaller than the queue size. It is the caller's
* responsibility to check how many bytes we were able to send.
*/
-
- written = transport->stream_enqueue(
- vsk, msg,
- len - total_written);
+ written = transport->stream_enqueue(vsk, msg,
+ len - total_written);
if (written < 0) {
err = -ENOMEM;
goto out_err;
@@ -1815,36 +1873,96 @@ static int vsock_stream_sendmsg(struct socket *sock, struct msghdr *msg,
}
out_err:
- if (total_written > 0)
- err = total_written;
+ if (total_written > 0) {
+ /* Return number of written bytes only if:
+ * 1) SOCK_STREAM socket.
+ * 2) SOCK_SEQPACKET socket when whole buffer is sent.
+ */
+ if (sk->sk_type == SOCK_STREAM || total_written == len)
+ err = total_written;
+ }
out:
release_sock(sk);
return err;
}
+static int vsock_stream_sendmsg(struct socket *sock, struct msghdr *msg,
+ size_t len)
+{
+ return vsock_connectible_sendmsg(sock, msg, len);
+}
-static int
-vsock_stream_recvmsg(struct socket *sock, struct msghdr *msg, size_t len,
- int flags)
+static int vsock_seqpacket_sendmsg(struct socket *sock, struct msghdr *msg,
+ size_t len)
{
- struct sock *sk;
+ return vsock_connectible_sendmsg(sock, msg, len);
+}
+
+static int vsock_wait_data(struct sock *sk, struct wait_queue_entry *wait,
+ long timeout,
+ struct vsock_transport_recv_notify_data *recv_data,
+ size_t target)
+{
+ int err = 0;
struct vsock_sock *vsk;
const struct vsock_transport *transport;
- int err;
- size_t target;
- ssize_t copied;
- long timeout;
- struct vsock_transport_recv_notify_data recv_data;
- DEFINE_WAIT(wait);
-
- sk = sock->sk;
vsk = vsock_sk(sk);
transport = vsk->transport;
- err = 0;
+ if (sk->sk_err != 0 ||
+ (sk->sk_shutdown & RCV_SHUTDOWN) ||
+ (vsk->peer_shutdown & SEND_SHUTDOWN)) {
+ finish_wait(sk_sleep(sk), wait);
+ return -1;
+ }
+ /* Don't wait for non-blocking sockets. */
+ if (timeout == 0) {
+ err = -EAGAIN;
+ finish_wait(sk_sleep(sk), wait);
+ return err;
+ }
+
+ if (sk->sk_type == SOCK_STREAM) {
+ err = transport->notify_recv_pre_block(vsk, target, recv_data);
+ if (err < 0) {
+ finish_wait(sk_sleep(sk), wait);
+ return err;
+ }
+ }
+
+ release_sock(sk);
+ timeout = schedule_timeout(timeout);
lock_sock(sk);
+ if (signal_pending(current)) {
+ err = sock_intr_errno(timeout);
+ finish_wait(sk_sleep(sk), wait);
+ } else if (timeout == 0) {
+ err = -EAGAIN;
+ finish_wait(sk_sleep(sk), wait);
+ }
+
+ return err;
+}
+
+static int vsock_wait_data_seqpacket(struct sock *sk, struct wait_queue_entry *wait,
+ long timeout)
+{
+ return vsock_wait_data(sk, wait, timeout, NULL, 0);
+}
+
+static int vsock_pre_recv_check(struct socket *sock,
+ int flags, size_t len, int *err)
+{
+ struct sock *sk;
+ struct vsock_sock *vsk;
+ const struct vsock_transport *transport;
+
+ sk = sock->sk;
+ vsk = vsock_sk(sk);
+ transport = vsk->transport;
+
if (!transport || 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
@@ -1852,16 +1970,16 @@ vsock_stream_recvmsg(struct socket *sock, struct msghdr *msg, size_t len,
* SOCK_DONE flag.
*/
if (sock_flag(sk, SOCK_DONE))
- err = 0;
+ *err = 0;
else
- err = -ENOTCONN;
+ *err = -ENOTCONN;
- goto out;
+ return false;
}
if (flags & MSG_OOB) {
- err = -EOPNOTSUPP;
- goto out;
+ *err = -EOPNOTSUPP;
+ return false;
}
/* We don't check peer_shutdown flag here since peer may actually shut
@@ -1869,17 +1987,143 @@ vsock_stream_recvmsg(struct socket *sock, struct msghdr *msg, size_t len,
* receive.
*/
if (sk->sk_shutdown & RCV_SHUTDOWN) {
- err = 0;
- goto out;
+ *err = 0;
+ return false;
}
/* It is valid on Linux to pass in a zero-length receive buffer. This
* is not an error. We may as well bail out now.
*/
if (!len) {
+ *err = 0;
+ return false;
+ }
+
+ return true;
+}
+
+static int __vsock_seqpacket_recvmsg(struct sock *sk, struct msghdr *msg,
+ size_t len, int flags)
+{
+ int err = 0;
+ size_t record_len;
+ struct vsock_sock *vsk;
+ const struct vsock_transport *transport;
+ long timeout;
+ ssize_t dequeued_total = 0;
+ unsigned long orig_nr_segs;
+ const struct iovec *orig_iov;
+ DEFINE_WAIT(wait);
+
+ vsk = vsock_sk(sk);
+ transport = vsk->transport;
+
+ timeout = sock_rcvtimeo(sk, flags & MSG_DONTWAIT);
+ msg->msg_flags &= ~MSG_EOR;
+ orig_nr_segs = msg->msg_iter.nr_segs;
+ orig_iov = msg->msg_iter.iov;
+
+ while (1) {
+ s64 ready;
+
+ prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
+ ready = vsock_stream_has_data(vsk);
+
+ if (ready == 0) {
+ if (vsock_wait_data_seqpacket(sk, &wait, timeout)) {
+ /* In case of any loop break(timeout, signal
+ * interrupt or shutdown), we report user that
+ * nothing was copied.
+ */
+ dequeued_total = 0;
+ break;
+ }
+ } else {
+ ssize_t dequeued;
+
+ finish_wait(sk_sleep(sk), &wait);
+
+ if (ready < 0) {
+ err = -ENOMEM;
+ goto out;
+ }
+
+ if (dequeued_total == 0) {
+ record_len =
+ transport->seqpacket_seq_get_len(vsk);
+
+ if (record_len == 0)
+ continue;
+ }
+
+ /* 'msg_iter.count' is number of unused bytes in iov.
+ * On every copy to iov iterator it is decremented at
+ * size of data.
+ */
+ dequeued = transport->stream_dequeue(vsk, msg,
+ msg->msg_iter.count, flags);
+
+ if (dequeued < 0) {
+ dequeued_total = 0;
+
+ if (dequeued == -EAGAIN) {
+ iov_iter_init(&msg->msg_iter, READ,
+ orig_iov, orig_nr_segs,
+ len);
+ msg->msg_flags &= ~MSG_EOR;
+ continue;
+ }
+
+ err = -ENOMEM;
+ break;
+ }
+
+ dequeued_total += dequeued;
+
+ if (dequeued_total >= record_len)
+ break;
+ }
+ }
+
+ if (sk->sk_err)
+ err = -sk->sk_err;
+ else if (sk->sk_shutdown & RCV_SHUTDOWN)
err = 0;
- goto out;
+
+ if (dequeued_total > 0) {
+ /* User sets MSG_TRUNC, so return real length of
+ * packet.
+ */
+ if (flags & MSG_TRUNC)
+ err = record_len;
+ else
+ err = len - msg->msg_iter.count;
+
+ /* Always set MSG_TRUNC if real length of packet is
+ * bigger that user buffer.
+ */
+ if (record_len > len)
+ msg->msg_flags |= MSG_TRUNC;
}
+out:
+ return err;
+}
+
+static int __vsock_stream_recvmsg(struct sock *sk, struct msghdr *msg,
+ size_t len, int flags)
+{
+ int err;
+ const struct vsock_transport *transport;
+ struct vsock_sock *vsk;
+ size_t target;
+ struct vsock_transport_recv_notify_data recv_data;
+ long timeout;
+ ssize_t copied;
+
+ DEFINE_WAIT(wait);
+
+ vsk = vsock_sk(sk);
+ transport = vsk->transport;
/* We must not copy less than target bytes into the user's buffer
* before returning successfully, so we wait for the consume queue to
@@ -1888,10 +2132,12 @@ vsock_stream_recvmsg(struct socket *sock, struct msghdr *msg, size_t len,
* queue size.
*/
target = sock_rcvlowat(sk, flags & MSG_WAITALL, len);
+
if (target >= transport->stream_rcvhiwat(vsk)) {
err = -ENOMEM;
goto out;
}
+
timeout = sock_rcvtimeo(sk, flags & MSG_DONTWAIT);
copied = 0;
@@ -1899,7 +2145,6 @@ vsock_stream_recvmsg(struct socket *sock, struct msghdr *msg, size_t len,
if (err < 0)
goto out;
-
while (1) {
s64 ready;
@@ -1907,38 +2152,8 @@ vsock_stream_recvmsg(struct socket *sock, struct msghdr *msg, size_t len,
ready = vsock_stream_has_data(vsk);
if (ready == 0) {
- if (sk->sk_err != 0 ||
- (sk->sk_shutdown & RCV_SHUTDOWN) ||
- (vsk->peer_shutdown & SEND_SHUTDOWN)) {
- finish_wait(sk_sleep(sk), &wait);
+ if (vsock_wait_data(sk, &wait, timeout, &recv_data, target))
break;
- }
- /* Don't wait for non-blocking sockets. */
- if (timeout == 0) {
- err = -EAGAIN;
- finish_wait(sk_sleep(sk), &wait);
- break;
- }
-
- err = transport->notify_recv_pre_block(
- vsk, target, &recv_data);
- if (err < 0) {
- finish_wait(sk_sleep(sk), &wait);
- break;
- }
- release_sock(sk);
- timeout = schedule_timeout(timeout);
- lock_sock(sk);
-
- if (signal_pending(current)) {
- err = sock_intr_errno(timeout);
- finish_wait(sk_sleep(sk), &wait);
- break;
- } else if (timeout == 0) {
- err = -EAGAIN;
- finish_wait(sk_sleep(sk), &wait);
- break;
- }
} else {
ssize_t read;
@@ -1959,9 +2174,8 @@ vsock_stream_recvmsg(struct socket *sock, struct msghdr *msg, size_t len,
if (err < 0)
break;
- read = transport->stream_dequeue(
- vsk, msg,
- len - copied, flags);
+ read = transport->stream_dequeue(vsk, msg, len - copied, flags);
+
if (read < 0) {
err = -ENOMEM;
break;
@@ -1990,11 +2204,45 @@ vsock_stream_recvmsg(struct socket *sock, struct msghdr *msg, size_t len,
if (copied > 0)
err = copied;
+out:
+ return err;
+}
+
+static int vsock_connectible_recvmsg(struct socket *sock, struct msghdr *msg,
+ size_t len, int flags)
+{
+ struct sock *sk;
+ int err;
+
+ sk = sock->sk;
+
+ lock_sock(sk);
+
+ if (!vsock_pre_recv_check(sock, flags, len, &err))
+ goto out;
+
+ if (sk->sk_type == SOCK_STREAM)
+ err = __vsock_stream_recvmsg(sk, msg, len, flags);
+ else
+ err = __vsock_seqpacket_recvmsg(sk, msg, len, flags);
+
out:
release_sock(sk);
return err;
}
+static int vsock_seqpacket_recvmsg(struct socket *sock, struct msghdr *msg,
+ size_t len, int flags)
+{
+ return vsock_connectible_recvmsg(sock, msg, len, flags);
+}
+
+static int vsock_stream_recvmsg(struct socket *sock, struct msghdr *msg,
+ size_t len, int flags)
+{
+ return vsock_connectible_recvmsg(sock, msg, len, flags);
+}
+
static const struct proto_ops vsock_stream_ops = {
.family = PF_VSOCK,
.owner = THIS_MODULE,
@@ -2016,6 +2264,27 @@ static const struct proto_ops vsock_stream_ops = {
.sendpage = sock_no_sendpage,
};
+static const struct proto_ops vsock_seqpacket_ops = {
+ .family = PF_VSOCK,
+ .owner = THIS_MODULE,
+ .release = vsock_release,
+ .bind = vsock_bind,
+ .connect = vsock_seqpacket_connect,
+ .socketpair = sock_no_socketpair,
+ .accept = vsock_accept,
+ .getname = vsock_getname,
+ .poll = vsock_poll,
+ .ioctl = sock_no_ioctl,
+ .listen = vsock_listen,
+ .shutdown = vsock_shutdown,
+ .setsockopt = vsock_seqpacket_setsockopt,
+ .getsockopt = vsock_seqpacket_getsockopt,
+ .sendmsg = vsock_seqpacket_sendmsg,
+ .recvmsg = vsock_seqpacket_recvmsg,
+ .mmap = sock_no_mmap,
+ .sendpage = sock_no_sendpage,
+};
+
static int vsock_create(struct net *net, struct socket *sock,
int protocol, int kern)
{
@@ -2036,6 +2305,9 @@ static int vsock_create(struct net *net, struct socket *sock,
case SOCK_STREAM:
sock->ops = &vsock_stream_ops;
break;
+ case SOCK_SEQPACKET:
+ sock->ops = &vsock_seqpacket_ops;
+ break;
default:
return -ESOCKTNOSUPPORT;
}
--
2.25.1