Re: [RFC PATCH v4 01/17] af_vsock: update functions for connectible socket

[Stefano Garzarella]

On Sun, Feb 07, 2021 at 06:14:23PM +0300, Arseny Krasnov wrote:
> This prepares af_vsock.c for SEQPACKET support: some functions such
> as setsockopt(), getsockopt(), connect(), recvmsg(), sendmsg() are
> shared between both types of sockets, so rename them in general
> manner.
>
> Signed-off-by: Arseny Krasnov <arseny.krasnov@xxxxxxxxxxxxx>
> ---
> net/vmw_vsock/af_vsock.c | 64 +++++++++++++++++++++-------------------
> 1 file changed, 34 insertions(+), 30 deletions(-)

This patch LGTM:

Reviewed-by: Stefano Garzarella <sgarzare@xxxxxxxxxx>

Thanks,
Stefano

> diff --git a/net/vmw_vsock/af_vsock.c b/net/vmw_vsock/af_vsock.c
> index 6894f21dc147..f4fabec50650 100644
> --- a/net/vmw_vsock/af_vsock.c
> +++ b/net/vmw_vsock/af_vsock.c
> @@ -604,8 +604,8 @@ 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;
> @@ -685,7 +685,7 @@ static int __vsock_bind(struct sock *sk, struct sockaddr_vm *addr)
> 	switch (sk->sk_socket->type) {
> 	case SOCK_STREAM:
> 		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 +767,11 @@ static struct sock *__vsock_create(struct net *net,
> 	return sk;
> }
>
> +static bool sock_type_connectible(u16 type)
> +{
> +	return type == SOCK_STREAM;
> +}
> +
> static void __vsock_release(struct sock *sk, int level)
> {
> 	if (sk) {
> @@ -785,7 +790,7 @@ 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 +950,7 @@ 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 +965,7 @@ 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 +1018,7 @@ 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;
>
> 		lock_sock(sk);
> @@ -1263,8 +1268,8 @@ 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;
> @@ -1414,7 +1419,7 @@ 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;
> 	}
> @@ -1491,7 +1496,7 @@ 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;
> 	}
> @@ -1535,11 +1540,11 @@ 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_connectible_setsockopt(struct socket *sock,
> +					int level,
> +					int optname,
> +					sockptr_t optval,
> +					unsigned int optlen)
> {
> 	int err;
> 	struct sock *sk;
> @@ -1617,10 +1622,10 @@ static int vsock_stream_setsockopt(struct socket *sock,
> 	return err;
> }
>
> -static int vsock_stream_getsockopt(struct socket *sock,
> -				   int level, int optname,
> -				   char __user *optval,
> -				   int __user *optlen)
> +static int vsock_connectible_getsockopt(struct socket *sock,
> +					int level, int optname,
> +					char __user *optval,
> +					int __user *optlen)
> {
> 	int err;
> 	int len;
> @@ -1688,8 +1693,8 @@ 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_connectible_sendmsg(struct socket *sock, struct msghdr *msg,
> +				     size_t len)
> {
> 	struct sock *sk;
> 	struct vsock_sock *vsk;
> @@ -1828,10 +1833,9 @@ static int vsock_stream_sendmsg(struct socket *sock, struct msghdr *msg,
> 	return err;
> }
>
> -
> static int
> -vsock_stream_recvmsg(struct socket *sock, struct msghdr *msg, size_t len,
> -		     int flags)
> +vsock_connectible_recvmsg(struct socket *sock, struct msghdr *msg, size_t len,
> +			  int flags)
> {
> 	struct sock *sk;
> 	struct vsock_sock *vsk;
> @@ -2007,7 +2011,7 @@ static const struct proto_ops vsock_stream_ops = {
> 	.owner = THIS_MODULE,
> 	.release = vsock_release,
> 	.bind = vsock_bind,
> -	.connect = vsock_stream_connect,
> +	.connect = vsock_connect,
> 	.socketpair = sock_no_socketpair,
> 	.accept = vsock_accept,
> 	.getname = vsock_getname,
> @@ -2015,10 +2019,10 @@ static const struct proto_ops vsock_stream_ops = {
> 	.ioctl = sock_no_ioctl,
> 	.listen = vsock_listen,
> 	.shutdown = vsock_shutdown,
> -	.setsockopt = vsock_stream_setsockopt,
> -	.getsockopt = vsock_stream_getsockopt,
> -	.sendmsg = vsock_stream_sendmsg,
> -	.recvmsg = vsock_stream_recvmsg,
> +	.setsockopt = vsock_connectible_setsockopt,
> +	.getsockopt = vsock_connectible_getsockopt,
> +	.sendmsg = vsock_connectible_sendmsg,
> +	.recvmsg = vsock_connectible_recvmsg,
> 	.mmap = sock_no_mmap,
> 	.sendpage = sock_no_sendpage,
> };
> --
> 2.25.1