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Subject[RFC PATCH v5 07/19] af_vsock: rest of SEQPACKET support
Date
This does rest of SOCK_SEQPACKET support:
1) Adds socket ops for SEQPACKET type.
2) Allows to create socket with SEQPACKET type.

Signed-off-by: Arseny Krasnov <arseny.krasnov@kaspersky.com>
---
net/vmw_vsock/af_vsock.c | 36 +++++++++++++++++++++++++++++++++++-
1 file changed, 35 insertions(+), 1 deletion(-)

diff --git a/net/vmw_vsock/af_vsock.c b/net/vmw_vsock/af_vsock.c
index f352cd9d91ce..f4b02c6d35d1 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 ||
@@ -484,6 +485,14 @@ int vsock_assign_transport(struct vsock_sock *vsk, struct vsock_sock *psk)
if (!new_transport || !try_module_get(new_transport->module))
return -ENODEV;

+ if (sk->sk_type == SOCK_SEQPACKET) {
+ if (!new_transport->seqpacket_seq_send_len ||
+ !new_transport->seqpacket_seq_send_eor ||
+ !new_transport->seqpacket_seq_get_len ||
+ !new_transport->seqpacket_dequeue)
+ return -ESOCKTNOSUPPORT;
+ }
+
ret = new_transport->init(vsk, psk);
if (ret) {
module_put(new_transport->module);
@@ -684,6 +693,7 @@ 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_connectible(vsk, addr);
spin_unlock_bh(&vsock_table_lock);
@@ -769,7 +779,7 @@ static struct sock *__vsock_create(struct net *net,

static bool sock_type_connectible(u16 type)
{
- return type == SOCK_STREAM;
+ return (type == SOCK_STREAM) || (type == SOCK_SEQPACKET);
}

static void __vsock_release(struct sock *sk, int level)
@@ -2191,6 +2201,27 @@ 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_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_connectible_setsockopt,
+ .getsockopt = vsock_connectible_getsockopt,
+ .sendmsg = vsock_connectible_sendmsg,
+ .recvmsg = vsock_connectible_recvmsg,
+ .mmap = sock_no_mmap,
+ .sendpage = sock_no_sendpage,
+};
+
static int vsock_create(struct net *net, struct socket *sock,
int protocol, int kern)
{
@@ -2211,6 +2242,9 @@ 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
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