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ip_tunnel: use ndo_siocdevprivate 

The various ipv4 and ipv6 tunnel drivers each implement a set
of 12 SIOCDEVPRIVATE commands for managing tunnels. These
all work correctly in compat mode.

Move them over to the new .ndo_siocdevprivate operation.

Cc: Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org>
Cc: David Ahern <dsahern@kernel.org>
Cc: Steffen Klassert <steffen.klassert@secunet.com>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Arnd Bergmann 2021-07-27 15:45:06 +02:00 committed by David S. Miller
parent ae6af0120d
commit 3e7a1c7c56
9 changed files with 59 additions and 53 deletions
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3
include/net/ip_tunnels.h
View File

@ -270,7 +270,8 @@ void ip_tunnel_xmit(struct sk_buff *skb, struct net_device *dev,
void ip_md_tunnel_xmit(struct sk_buff *skb, struct net_device *dev,
const u8 proto, int tunnel_hlen);
int ip_tunnel_ctl(struct net_device *dev, struct ip_tunnel_parm *p, int cmd);
int ip_tunnel_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd);
int ip_tunnel_siocdevprivate(struct net_device *dev, struct ifreq *ifr,
void __user *data, int cmd);
int __ip_tunnel_change_mtu(struct net_device *dev, int new_mtu, bool strict);
int ip_tunnel_change_mtu(struct net_device *dev, int new_mtu);

2
net/ipv4/ip_gre.c
View File

@ -923,7 +923,7 @@ static const struct net_device_ops ipgre_netdev_ops = {
.ndo_stop = ipgre_close,
#endif
.ndo_start_xmit = ipgre_xmit,
.ndo_do_ioctl = ip_tunnel_ioctl,
.ndo_siocdevprivate = ip_tunnel_siocdevprivate,
.ndo_change_mtu = ip_tunnel_change_mtu,
.ndo_get_stats64 = dev_get_tstats64,
.ndo_get_iflink = ip_tunnel_get_iflink,

9
net/ipv4/ip_tunnel.c
View File

@ -958,19 +958,20 @@ int ip_tunnel_ctl(struct net_device *dev, struct ip_tunnel_parm *p, int cmd)
}
EXPORT_SYMBOL_GPL(ip_tunnel_ctl);
int ip_tunnel_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
int ip_tunnel_siocdevprivate(struct net_device *dev, struct ifreq *ifr,
void __user *data, int cmd)
{
struct ip_tunnel_parm p;
int err;
if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof(p)))
if (copy_from_user(&p, data, sizeof(p)))
return -EFAULT;
err = dev->netdev_ops->ndo_tunnel_ctl(dev, &p, cmd);
if (!err && copy_to_user(ifr->ifr_ifru.ifru_data, &p, sizeof(p)))
if (!err && copy_to_user(data, &p, sizeof(p)))
return -EFAULT;
return err;
}
EXPORT_SYMBOL_GPL(ip_tunnel_ioctl);
EXPORT_SYMBOL_GPL(ip_tunnel_siocdevprivate);
int __ip_tunnel_change_mtu(struct net_device *dev, int new_mtu, bool strict)
{

2
net/ipv4/ip_vti.c
View File

@ -405,7 +405,7 @@ static const struct net_device_ops vti_netdev_ops = {
.ndo_init = vti_tunnel_init,
.ndo_uninit = ip_tunnel_uninit,
.ndo_start_xmit = vti_tunnel_xmit,
.ndo_do_ioctl = ip_tunnel_ioctl,
.ndo_siocdevprivate = ip_tunnel_siocdevprivate,
.ndo_change_mtu = ip_tunnel_change_mtu,
.ndo_get_stats64 = dev_get_tstats64,
.ndo_get_iflink = ip_tunnel_get_iflink,

2
net/ipv4/ipip.c
View File

@ -347,7 +347,7 @@ static const struct net_device_ops ipip_netdev_ops = {
.ndo_init = ipip_tunnel_init,
.ndo_uninit = ip_tunnel_uninit,
.ndo_start_xmit = ipip_tunnel_xmit,
.ndo_do_ioctl = ip_tunnel_ioctl,
.ndo_siocdevprivate = ip_tunnel_siocdevprivate,
.ndo_change_mtu = ip_tunnel_change_mtu,
.ndo_get_stats64 = dev_get_tstats64,
.ndo_get_iflink = ip_tunnel_get_iflink,

17
net/ipv6/ip6_gre.c
View File

@ -1244,8 +1244,9 @@ static void ip6gre_tnl_parm_to_user(struct ip6_tnl_parm2 *u,
memcpy(u->name, p->name, sizeof(u->name));
}
static int ip6gre_tunnel_ioctl(struct net_device *dev,
struct ifreq *ifr, int cmd)
static int ip6gre_tunnel_siocdevprivate(struct net_device *dev,
struct ifreq *ifr, void __user *data,
int cmd)
{
int err = 0;
struct ip6_tnl_parm2 p;
@ -1259,7 +1260,7 @@ static int ip6gre_tunnel_ioctl(struct net_device *dev,
switch (cmd) {
case SIOCGETTUNNEL:
if (dev == ign->fb_tunnel_dev) {
if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof(p))) {
if (copy_from_user(&p, data, sizeof(p))) {
err = -EFAULT;
break;
}
@ -1270,7 +1271,7 @@ static int ip6gre_tunnel_ioctl(struct net_device *dev,
}
memset(&p, 0, sizeof(p));
ip6gre_tnl_parm_to_user(&p, &t->parms);
if (copy_to_user(ifr->ifr_ifru.ifru_data, &p, sizeof(p)))
if (copy_to_user(data, &p, sizeof(p)))
err = -EFAULT;
break;
@ -1281,7 +1282,7 @@ static int ip6gre_tunnel_ioctl(struct net_device *dev,
goto done;
err = -EFAULT;
if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof(p)))
if (copy_from_user(&p, data, sizeof(p)))
goto done;
err = -EINVAL;
@ -1318,7 +1319,7 @@ static int ip6gre_tunnel_ioctl(struct net_device *dev,
memset(&p, 0, sizeof(p));
ip6gre_tnl_parm_to_user(&p, &t->parms);
if (copy_to_user(ifr->ifr_ifru.ifru_data, &p, sizeof(p)))
if (copy_to_user(data, &p, sizeof(p)))
err = -EFAULT;
} else
err = (cmd == SIOCADDTUNNEL ? -ENOBUFS : -ENOENT);
@ -1331,7 +1332,7 @@ static int ip6gre_tunnel_ioctl(struct net_device *dev,
if (dev == ign->fb_tunnel_dev) {
err = -EFAULT;
if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof(p)))
if (copy_from_user(&p, data, sizeof(p)))
goto done;
err = -ENOENT;
ip6gre_tnl_parm_from_user(&p1, &p);
@ -1398,7 +1399,7 @@ static const struct net_device_ops ip6gre_netdev_ops = {
.ndo_init = ip6gre_tunnel_init,
.ndo_uninit = ip6gre_tunnel_uninit,
.ndo_start_xmit = ip6gre_tunnel_xmit,
.ndo_do_ioctl = ip6gre_tunnel_ioctl,
.ndo_siocdevprivate = ip6gre_tunnel_siocdevprivate,
.ndo_change_mtu = ip6_tnl_change_mtu,
.ndo_get_stats64 = dev_get_tstats64,
.ndo_get_iflink = ip6_tnl_get_iflink,

21
net/ipv6/ip6_tunnel.c
View File

@ -1581,9 +1581,10 @@ ip6_tnl_parm_to_user(struct ip6_tnl_parm *u, const struct __ip6_tnl_parm *p)
}
/**
* ip6_tnl_ioctl - configure ipv6 tunnels from userspace
* ip6_tnl_siocdevprivate - configure ipv6 tunnels from userspace
* @dev: virtual device associated with tunnel
* @ifr: parameters passed from userspace
* @ifr: unused
* @data: parameters passed from userspace
* @cmd: command to be performed
*
* Description:
@ -1609,7 +1610,8 @@ ip6_tnl_parm_to_user(struct ip6_tnl_parm *u, const struct __ip6_tnl_parm *p)
**/
static int
ip6_tnl_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
ip6_tnl_siocdevprivate(struct net_device *dev, struct ifreq *ifr,
void __user *data, int cmd)
{
int err = 0;
struct ip6_tnl_parm p;
@ -1623,7 +1625,7 @@ ip6_tnl_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
switch (cmd) {
case SIOCGETTUNNEL:
if (dev == ip6n->fb_tnl_dev) {
if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof(p))) {
if (copy_from_user(&p, data, sizeof(p))) {
err = -EFAULT;
break;
}
@ -1635,9 +1637,8 @@ ip6_tnl_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
memset(&p, 0, sizeof(p));
}
ip6_tnl_parm_to_user(&p, &t->parms);
if (copy_to_user(ifr->ifr_ifru.ifru_data, &p, sizeof(p))) {
if (copy_to_user(data, &p, sizeof(p)))
err = -EFAULT;
}
break;
case SIOCADDTUNNEL:
case SIOCCHGTUNNEL:
@ -1645,7 +1646,7 @@ ip6_tnl_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
break;
err = -EFAULT;
if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof(p)))
if (copy_from_user(&p, data, sizeof(p)))
break;
err = -EINVAL;
if (p.proto != IPPROTO_IPV6 && p.proto != IPPROTO_IPIP &&
@ -1669,7 +1670,7 @@ ip6_tnl_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
if (!IS_ERR(t)) {
err = 0;
ip6_tnl_parm_to_user(&p, &t->parms);
if (copy_to_user(ifr->ifr_ifru.ifru_data, &p, sizeof(p)))
if (copy_to_user(data, &p, sizeof(p)))
err = -EFAULT;
} else {
@ -1683,7 +1684,7 @@ ip6_tnl_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
if (dev == ip6n->fb_tnl_dev) {
err = -EFAULT;
if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof(p)))
if (copy_from_user(&p, data, sizeof(p)))
break;
err = -ENOENT;
ip6_tnl_parm_from_user(&p1, &p);
@ -1802,7 +1803,7 @@ static const struct net_device_ops ip6_tnl_netdev_ops = {
.ndo_init = ip6_tnl_dev_init,
.ndo_uninit = ip6_tnl_dev_uninit,
.ndo_start_xmit = ip6_tnl_start_xmit,
.ndo_do_ioctl = ip6_tnl_ioctl,
.ndo_siocdevprivate = ip6_tnl_siocdevprivate,
.ndo_change_mtu = ip6_tnl_change_mtu,
.ndo_get_stats64 = dev_get_tstats64,
.ndo_get_iflink = ip6_tnl_get_iflink,

21
net/ipv6/ip6_vti.c
View File

@ -771,13 +771,14 @@ vti6_parm_to_user(struct ip6_tnl_parm2 *u, const struct __ip6_tnl_parm *p)
}
/**
* vti6_ioctl - configure vti6 tunnels from userspace
* vti6_siocdevprivate - configure vti6 tunnels from userspace
* @dev: virtual device associated with tunnel
* @ifr: parameters passed from userspace
* @ifr: unused
* @data: parameters passed from userspace
* @cmd: command to be performed
*
* Description:
* vti6_ioctl() is used for managing vti6 tunnels
* vti6_siocdevprivate() is used for managing vti6 tunnels
* from userspace.
*
* The possible commands are the following:
@ -798,7 +799,7 @@ vti6_parm_to_user(struct ip6_tnl_parm2 *u, const struct __ip6_tnl_parm *p)
* %-ENODEV if attempting to change or delete a nonexisting device
**/
static int
vti6_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
vti6_siocdevprivate(struct net_device *dev, struct ifreq *ifr, void __user *data, int cmd)
{
int err = 0;
struct ip6_tnl_parm2 p;
@ -810,7 +811,7 @@ vti6_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
switch (cmd) {
case SIOCGETTUNNEL:
if (dev == ip6n->fb_tnl_dev) {
if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof(p))) {
if (copy_from_user(&p, data, sizeof(p))) {
err = -EFAULT;
break;
}
@ -822,7 +823,7 @@ vti6_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
if (!t)
t = netdev_priv(dev);
vti6_parm_to_user(&p, &t->parms);
if (copy_to_user(ifr->ifr_ifru.ifru_data, &p, sizeof(p)))
if (copy_to_user(data, &p, sizeof(p)))
err = -EFAULT;
break;
case SIOCADDTUNNEL:
@ -831,7 +832,7 @@ vti6_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
break;
err = -EFAULT;
if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof(p)))
if (copy_from_user(&p, data, sizeof(p)))
break;
err = -EINVAL;
if (p.proto != IPPROTO_IPV6 && p.proto != 0)
@ -852,7 +853,7 @@ vti6_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
if (t) {
err = 0;
vti6_parm_to_user(&p, &t->parms);
if (copy_to_user(ifr->ifr_ifru.ifru_data, &p, sizeof(p)))
if (copy_to_user(data, &p, sizeof(p)))
err = -EFAULT;
} else
@ -865,7 +866,7 @@ vti6_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
if (dev == ip6n->fb_tnl_dev) {
err = -EFAULT;
if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof(p)))
if (copy_from_user(&p, data, sizeof(p)))
break;
err = -ENOENT;
vti6_parm_from_user(&p1, &p);
@ -890,7 +891,7 @@ static const struct net_device_ops vti6_netdev_ops = {
.ndo_init = vti6_dev_init,
.ndo_uninit = vti6_dev_uninit,
.ndo_start_xmit = vti6_tnl_xmit,
.ndo_do_ioctl = vti6_ioctl,
.ndo_siocdevprivate = vti6_siocdevprivate,
.ndo_get_stats64 = dev_get_tstats64,
.ndo_get_iflink = ip6_tnl_get_iflink,
};

35
net/ipv6/sit.c
View File

@ -299,9 +299,8 @@ __ipip6_tunnel_locate_prl(struct ip_tunnel *t, __be32 addr)
}
static int ipip6_tunnel_get_prl(struct net_device *dev, struct ifreq *ifr)
static int ipip6_tunnel_get_prl(struct net_device *dev, struct ip_tunnel_prl __user *a)
{
struct ip_tunnel_prl __user *a = ifr->ifr_ifru.ifru_data;
struct ip_tunnel *t = netdev_priv(dev);
struct ip_tunnel_prl kprl, *kp;
struct ip_tunnel_prl_entry *prl;
@ -454,8 +453,8 @@ ipip6_tunnel_del_prl(struct ip_tunnel *t, struct ip_tunnel_prl *a)
return err;
}
static int ipip6_tunnel_prl_ctl(struct net_device *dev, struct ifreq *ifr,
int cmd)
static int ipip6_tunnel_prl_ctl(struct net_device *dev,
struct ip_tunnel_prl __user *data, int cmd)
{
struct ip_tunnel *t = netdev_priv(dev);
struct ip_tunnel_prl prl;
@ -466,7 +465,7 @@ static int ipip6_tunnel_prl_ctl(struct net_device *dev, struct ifreq *ifr,
if (dev == dev_to_sit_net(dev)->fb_tunnel_dev)
return -EINVAL;
if (copy_from_user(&prl, ifr->ifr_ifru.ifru_data, sizeof(prl)))
if (copy_from_user(&prl, data, sizeof(prl)))
return -EFAULT;
switch (cmd) {
@ -1198,14 +1197,14 @@ static int ipip6_tunnel_update_6rd(struct ip_tunnel *t,
}
static int
ipip6_tunnel_get6rd(struct net_device *dev, struct ifreq *ifr)
ipip6_tunnel_get6rd(struct net_device *dev, struct ip_tunnel_parm __user *data)
{
struct ip_tunnel *t = netdev_priv(dev);
struct ip_tunnel_6rd ip6rd;
struct ip_tunnel_parm p;
if (dev == dev_to_sit_net(dev)->fb_tunnel_dev) {
if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof(p)))
if (copy_from_user(&p, data, sizeof(p)))
return -EFAULT;
t = ipip6_tunnel_locate(t->net, &p, 0);
}
@ -1216,13 +1215,14 @@ ipip6_tunnel_get6rd(struct net_device *dev, struct ifreq *ifr)
ip6rd.relay_prefix = t->ip6rd.relay_prefix;
ip6rd.prefixlen = t->ip6rd.prefixlen;
ip6rd.relay_prefixlen = t->ip6rd.relay_prefixlen;
if (copy_to_user(ifr->ifr_ifru.ifru_data, &ip6rd, sizeof(ip6rd)))
if (copy_to_user(data, &ip6rd, sizeof(ip6rd)))
return -EFAULT;
return 0;
}
static int
ipip6_tunnel_6rdctl(struct net_device *dev, struct ifreq *ifr, int cmd)
ipip6_tunnel_6rdctl(struct net_device *dev, struct ip_tunnel_6rd __user *data,
int cmd)
{
struct ip_tunnel *t = netdev_priv(dev);
struct ip_tunnel_6rd ip6rd;
@ -1230,7 +1230,7 @@ ipip6_tunnel_6rdctl(struct net_device *dev, struct ifreq *ifr, int cmd)
if (!ns_capable(t->net->user_ns, CAP_NET_ADMIN))
return -EPERM;
if (copy_from_user(&ip6rd, ifr->ifr_ifru.ifru_data, sizeof(ip6rd)))
if (copy_from_user(&ip6rd, data, sizeof(ip6rd)))
return -EFAULT;
if (cmd != SIOCDEL6RD) {
@ -1369,27 +1369,28 @@ ipip6_tunnel_ctl(struct net_device *dev, struct ip_tunnel_parm *p, int cmd)
}
static int
ipip6_tunnel_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
ipip6_tunnel_siocdevprivate(struct net_device *dev, struct ifreq *ifr,
void __user *data, int cmd)
{
switch (cmd) {
case SIOCGETTUNNEL:
case SIOCADDTUNNEL:
case SIOCCHGTUNNEL:
case SIOCDELTUNNEL:
return ip_tunnel_ioctl(dev, ifr, cmd);
return ip_tunnel_siocdevprivate(dev, ifr, data, cmd);
case SIOCGETPRL:
return ipip6_tunnel_get_prl(dev, ifr);
return ipip6_tunnel_get_prl(dev, data);
case SIOCADDPRL:
case SIOCDELPRL:
case SIOCCHGPRL:
return ipip6_tunnel_prl_ctl(dev, ifr, cmd);
return ipip6_tunnel_prl_ctl(dev, data, cmd);
#ifdef CONFIG_IPV6_SIT_6RD
case SIOCGET6RD:
return ipip6_tunnel_get6rd(dev, ifr);
return ipip6_tunnel_get6rd(dev, data);
case SIOCADD6RD:
case SIOCCHG6RD:
case SIOCDEL6RD:
return ipip6_tunnel_6rdctl(dev, ifr, cmd);
return ipip6_tunnel_6rdctl(dev, data, cmd);
#endif
default:
return -EINVAL;
@ -1400,7 +1401,7 @@ static const struct net_device_ops ipip6_netdev_ops = {
.ndo_init = ipip6_tunnel_init,
.ndo_uninit = ipip6_tunnel_uninit,
.ndo_start_xmit = sit_tunnel_xmit,
.ndo_do_ioctl = ipip6_tunnel_ioctl,
.ndo_siocdevprivate = ipip6_tunnel_siocdevprivate,
.ndo_get_stats64 = dev_get_tstats64,
.ndo_get_iflink = ip_tunnel_get_iflink,
.ndo_tunnel_ctl = ipip6_tunnel_ctl,