Orange Pi5 kernel

// SPDX-License-Identifier: GPL-2.0
/* net/atm/pvc.c - ATM PVC sockets */
 
/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
 
 
#include <linux/net.h>		/* struct socket, struct proto_ops */
#include <linux/atm.h>		/* ATM stuff */
#include <linux/atmdev.h>	/* ATM devices */
#include <linux/errno.h>	/* error codes */
#include <linux/kernel.h>	/* printk */
#include <linux/init.h>
#include <linux/skbuff.h>
#include <linux/bitops.h>
#include <linux/export.h>
#include <net/sock.h>		/* for sock_no_* */
 
#include "resources.h"		/* devs and vccs */
#include "common.h"		/* common for PVCs and SVCs */
 
 
static int pvc_shutdown(struct socket *sock, int how)
{
<------>return 0;
}
 
static int pvc_bind(struct socket *sock, struct sockaddr *sockaddr,
<------><------>    int sockaddr_len)
{
<------>struct sock *sk = sock->sk;
<------>struct sockaddr_atmpvc *addr;
<------>struct atm_vcc *vcc;
<------>int error;
 
<------>if (sockaddr_len != sizeof(struct sockaddr_atmpvc))
<------><------>return -EINVAL;
<------>addr = (struct sockaddr_atmpvc *)sockaddr;
<------>if (addr->sap_family != AF_ATMPVC)
<------><------>return -EAFNOSUPPORT;
<------>lock_sock(sk);
<------>vcc = ATM_SD(sock);
<------>if (!test_bit(ATM_VF_HASQOS, &vcc->flags)) {
<------><------>error = -EBADFD;
<------><------>goto out;
<------>}
<------>if (test_bit(ATM_VF_PARTIAL, &vcc->flags)) {
<------><------>if (vcc->vpi != ATM_VPI_UNSPEC)
<------><------><------>addr->sap_addr.vpi = vcc->vpi;
<------><------>if (vcc->vci != ATM_VCI_UNSPEC)
<------><------><------>addr->sap_addr.vci = vcc->vci;
<------>}
<------>error = vcc_connect(sock, addr->sap_addr.itf, addr->sap_addr.vpi,
<------><------><------>    addr->sap_addr.vci);
out:
<------>release_sock(sk);
<------>return error;
}
 
static int pvc_connect(struct socket *sock, struct sockaddr *sockaddr,
<------><------>       int sockaddr_len, int flags)
{
<------>return pvc_bind(sock, sockaddr, sockaddr_len);
}
 
static int pvc_setsockopt(struct socket *sock, int level, int optname,
<------><------><------>  sockptr_t optval, unsigned int optlen)
{
<------>struct sock *sk = sock->sk;
<------>int error;
 
<------>lock_sock(sk);
<------>error = vcc_setsockopt(sock, level, optname, optval, optlen);
<------>release_sock(sk);
<------>return error;
}
 
static int pvc_getsockopt(struct socket *sock, int level, int optname,
<------><------><------>  char __user *optval, int __user *optlen)
{
<------>struct sock *sk = sock->sk;
<------>int error;
 
<------>lock_sock(sk);
<------>error = vcc_getsockopt(sock, level, optname, optval, optlen);
<------>release_sock(sk);
<------>return error;
}
 
static int pvc_getname(struct socket *sock, struct sockaddr *sockaddr,
<------><------>       int peer)
{
<------>struct sockaddr_atmpvc *addr;
<------>struct atm_vcc *vcc = ATM_SD(sock);
 
<------>if (!vcc->dev || !test_bit(ATM_VF_ADDR, &vcc->flags))
<------><------>return -ENOTCONN;
<------>addr = (struct sockaddr_atmpvc *)sockaddr;
<------>memset(addr, 0, sizeof(*addr));
<------>addr->sap_family = AF_ATMPVC;
<------>addr->sap_addr.itf = vcc->dev->number;
<------>addr->sap_addr.vpi = vcc->vpi;
<------>addr->sap_addr.vci = vcc->vci;
<------>return sizeof(struct sockaddr_atmpvc);
}
 
static const struct proto_ops pvc_proto_ops = {
<------>.family =	PF_ATMPVC,
<------>.owner =	THIS_MODULE,
 
<------>.release =	vcc_release,
<------>.bind =		pvc_bind,
<------>.connect =	pvc_connect,
<------>.socketpair =	sock_no_socketpair,
<------>.accept =	sock_no_accept,
<------>.getname =	pvc_getname,
<------>.poll =		vcc_poll,
<------>.ioctl =	vcc_ioctl,
#ifdef CONFIG_COMPAT
<------>.compat_ioctl = vcc_compat_ioctl,
#endif
<------>.gettstamp =	sock_gettstamp,
<------>.listen =	sock_no_listen,
<------>.shutdown =	pvc_shutdown,
<------>.setsockopt =	pvc_setsockopt,
<------>.getsockopt =	pvc_getsockopt,
<------>.sendmsg =	vcc_sendmsg,
<------>.recvmsg =	vcc_recvmsg,
<------>.mmap =		sock_no_mmap,
<------>.sendpage =	sock_no_sendpage,
};
 
 
static int pvc_create(struct net *net, struct socket *sock, int protocol,
<------><------>      int kern)
{
<------>if (net != &init_net)
<------><------>return -EAFNOSUPPORT;
 
<------>sock->ops = &pvc_proto_ops;
<------>return vcc_create(net, sock, protocol, PF_ATMPVC, kern);
}
 
static const struct net_proto_family pvc_family_ops = {
<------>.family = PF_ATMPVC,
<------>.create = pvc_create,
<------>.owner = THIS_MODULE,
};
 
 
/*
 *	Initialize the ATM PVC protocol family
 */
 
 
int __init atmpvc_init(void)
{
<------>return sock_register(&pvc_family_ops);
}
 
void atmpvc_exit(void)
{
<------>sock_unregister(PF_ATMPVC);
}