This adds socket operations for SOCK_SEQPACKET and adds this type of
socket for conditions where SOCK_STREAM is involved because both type of
sockets are connect oriented.
Signed-off-by: Arseny Krasnov <arseny.kras...@kaspersky.com>
---
net/vmw_vsock/af_vsock.c | 108 +++++++++++++++++++++++++++++++++------
1 file changed, 92 insertions(+), 16 deletions(-)
diff --git a/net/vmw_vsock/af_vsock.c b/net/vmw_vsock/af_vsock.c
index 4a7cdf7756c0..d0ef066e9352 100644
--- a/net/vmw_vsock/af_vsock.c
+++ b/net/vmw_vsock/af_vsock.c
@@ -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 +460,13 @@ 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 ||
+ !new_transport->seqpacket_dequeue)
+ return -ENODEV;
+ }
break;
default:
return -ESOCKTNOSUPPORT;
@@ -604,8 +612,8 @@ 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;
@@ -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);
@@ -945,7 +959,7 @@ static int vsock_shutdown(struct socket *sock, int mode)
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,
@@ -1683,6 +1727,14 @@ static int vsock_stream_getsockopt(struct socket *sock,
return 0;
}
+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)
{
@@ -2184,6 +2236,27 @@ 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)
{
@@ -2204,6 +2277,9 @@ 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
