cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

pvc.c (3840B)

      1// SPDX-License-Identifier: GPL-2.0
      2/* net/atm/pvc.c - ATM PVC sockets */
      3
      4/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
      5
      6
      7#include <linux/net.h>		/* struct socket, struct proto_ops */
      8#include <linux/atm.h>		/* ATM stuff */
      9#include <linux/atmdev.h>	/* ATM devices */
     10#include <linux/errno.h>	/* error codes */
     11#include <linux/kernel.h>	/* printk */
     12#include <linux/init.h>
     13#include <linux/skbuff.h>
     14#include <linux/bitops.h>
     15#include <linux/export.h>
     16#include <net/sock.h>		/* for sock_no_* */
     17
     18#include "resources.h"		/* devs and vccs */
     19#include "common.h"		/* common for PVCs and SVCs */
     20
     21
     22static int pvc_shutdown(struct socket *sock, int how)
     23{
     24	return 0;
     25}
     26
     27static int pvc_bind(struct socket *sock, struct sockaddr *sockaddr,
     28		    int sockaddr_len)
     29{
     30	struct sock *sk = sock->sk;
     31	struct sockaddr_atmpvc *addr;
     32	struct atm_vcc *vcc;
     33	int error;
     34
     35	if (sockaddr_len != sizeof(struct sockaddr_atmpvc))
     36		return -EINVAL;
     37	addr = (struct sockaddr_atmpvc *)sockaddr;
     38	if (addr->sap_family != AF_ATMPVC)
     39		return -EAFNOSUPPORT;
     40	lock_sock(sk);
     41	vcc = ATM_SD(sock);
     42	if (!test_bit(ATM_VF_HASQOS, &vcc->flags)) {
     43		error = -EBADFD;
     44		goto out;
     45	}
     46	if (test_bit(ATM_VF_PARTIAL, &vcc->flags)) {
     47		if (vcc->vpi != ATM_VPI_UNSPEC)
     48			addr->sap_addr.vpi = vcc->vpi;
     49		if (vcc->vci != ATM_VCI_UNSPEC)
     50			addr->sap_addr.vci = vcc->vci;
     51	}
     52	error = vcc_connect(sock, addr->sap_addr.itf, addr->sap_addr.vpi,
     53			    addr->sap_addr.vci);
     54out:
     55	release_sock(sk);
     56	return error;
     57}
     58
     59static int pvc_connect(struct socket *sock, struct sockaddr *sockaddr,
     60		       int sockaddr_len, int flags)
     61{
     62	return pvc_bind(sock, sockaddr, sockaddr_len);
     63}
     64
     65static int pvc_setsockopt(struct socket *sock, int level, int optname,
     66			  sockptr_t optval, unsigned int optlen)
     67{
     68	struct sock *sk = sock->sk;
     69	int error;
     70
     71	lock_sock(sk);
     72	error = vcc_setsockopt(sock, level, optname, optval, optlen);
     73	release_sock(sk);
     74	return error;
     75}
     76
     77static int pvc_getsockopt(struct socket *sock, int level, int optname,
     78			  char __user *optval, int __user *optlen)
     79{
     80	struct sock *sk = sock->sk;
     81	int error;
     82
     83	lock_sock(sk);
     84	error = vcc_getsockopt(sock, level, optname, optval, optlen);
     85	release_sock(sk);
     86	return error;
     87}
     88
     89static int pvc_getname(struct socket *sock, struct sockaddr *sockaddr,
     90		       int peer)
     91{
     92	struct sockaddr_atmpvc *addr;
     93	struct atm_vcc *vcc = ATM_SD(sock);
     94
     95	if (!vcc->dev || !test_bit(ATM_VF_ADDR, &vcc->flags))
     96		return -ENOTCONN;
     97	addr = (struct sockaddr_atmpvc *)sockaddr;
     98	memset(addr, 0, sizeof(*addr));
     99	addr->sap_family = AF_ATMPVC;
    100	addr->sap_addr.itf = vcc->dev->number;
    101	addr->sap_addr.vpi = vcc->vpi;
    102	addr->sap_addr.vci = vcc->vci;
    103	return sizeof(struct sockaddr_atmpvc);
    104}
    105
    106static const struct proto_ops pvc_proto_ops = {
    107	.family =	PF_ATMPVC,
    108	.owner =	THIS_MODULE,
    109
    110	.release =	vcc_release,
    111	.bind =		pvc_bind,
    112	.connect =	pvc_connect,
    113	.socketpair =	sock_no_socketpair,
    114	.accept =	sock_no_accept,
    115	.getname =	pvc_getname,
    116	.poll =		vcc_poll,
    117	.ioctl =	vcc_ioctl,
    118#ifdef CONFIG_COMPAT
    119	.compat_ioctl = vcc_compat_ioctl,
    120#endif
    121	.gettstamp =	sock_gettstamp,
    122	.listen =	sock_no_listen,
    123	.shutdown =	pvc_shutdown,
    124	.setsockopt =	pvc_setsockopt,
    125	.getsockopt =	pvc_getsockopt,
    126	.sendmsg =	vcc_sendmsg,
    127	.recvmsg =	vcc_recvmsg,
    128	.mmap =		sock_no_mmap,
    129	.sendpage =	sock_no_sendpage,
    130};
    131
    132
    133static int pvc_create(struct net *net, struct socket *sock, int protocol,
    134		      int kern)
    135{
    136	if (net != &init_net)
    137		return -EAFNOSUPPORT;
    138
    139	sock->ops = &pvc_proto_ops;
    140	return vcc_create(net, sock, protocol, PF_ATMPVC, kern);
    141}
    142
    143static const struct net_proto_family pvc_family_ops = {
    144	.family = PF_ATMPVC,
    145	.create = pvc_create,
    146	.owner = THIS_MODULE,
    147};
    148
    149
    150/*
    151 *	Initialize the ATM PVC protocol family
    152 */
    153
    154
    155int __init atmpvc_init(void)
    156{
    157	return sock_register(&pvc_family_ops);
    158}
    159
    160void atmpvc_exit(void)
    161{
    162	sock_unregister(PF_ATMPVC);
    163}