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sit: impement ->ndo_tunnel_ctl

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Implement the ->ndo_tunnel_ctl method, and use ip_tunnel_ioctl to
handle userspace requests for the SIOCGETTUNNEL, SIOCADDTUNNEL,
SIOCCHGTUNNEL and SIOCDELTUNNEL ioctls.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Christoph Hellwig 2020-05-19 15:03:16 +02:00 • committed by David S. Miller
parent fd5d687b76
commit f60fe2df93
1 changed files with 34 additions and 39 deletions
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73
net/ipv6/sit.c
View file

@ -1267,60 +1267,45 @@ __ipip6_tunnel_ioctl_validate(struct net *net, struct ip_tunnel_parm *p)
} }
static int static int
ipip6_tunnel_get(struct net_device *dev, struct ifreq *ifr) ipip6_tunnel_get(struct net_device *dev, struct ip_tunnel_parm *p)
{ {
struct ip_tunnel *t = netdev_priv(dev); struct ip_tunnel *t = netdev_priv(dev);
struct ip_tunnel_parm p;
if (dev == dev_to_sit_net(dev)->fb_tunnel_dev) { if (dev == dev_to_sit_net(dev)->fb_tunnel_dev)
if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof(p))) t = ipip6_tunnel_locate(t->net, p, 0);
return -EFAULT;
t = ipip6_tunnel_locate(t->net, &p, 0);
}
if (!t) if (!t)
t = netdev_priv(dev); t = netdev_priv(dev);
memcpy(p, &t->parms, sizeof(*p));
if (copy_to_user(ifr->ifr_ifru.ifru_data, &t->parms, sizeof(p)))
return -EFAULT;
return 0; return 0;
} }
static int static int
ipip6_tunnel_add(struct net_device *dev, struct ifreq *ifr) ipip6_tunnel_add(struct net_device *dev, struct ip_tunnel_parm *p)
{ {
struct ip_tunnel *t = netdev_priv(dev); struct ip_tunnel *t = netdev_priv(dev);
struct ip_tunnel_parm p;
int err; int err;
if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof(p))) err = __ipip6_tunnel_ioctl_validate(t->net, p);
return -EFAULT;
err = __ipip6_tunnel_ioctl_validate(t->net, &p);
if (err) if (err)
return err; return err;
t = ipip6_tunnel_locate(t->net, &p, 1); t = ipip6_tunnel_locate(t->net, p, 1);
if (!t) if (!t)
return -ENOBUFS; return -ENOBUFS;
if (copy_to_user(ifr->ifr_ifru.ifru_data, &t->parms, sizeof(p)))
return -EFAULT;
return 0; return 0;
} }
static int static int
ipip6_tunnel_change(struct net_device *dev, struct ifreq *ifr) ipip6_tunnel_change(struct net_device *dev, struct ip_tunnel_parm *p)
{ {
struct ip_tunnel *t = netdev_priv(dev); struct ip_tunnel *t = netdev_priv(dev);
struct ip_tunnel_parm p;
int err; int err;
if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof(p))) err = __ipip6_tunnel_ioctl_validate(t->net, p);
return -EFAULT;
err = __ipip6_tunnel_ioctl_validate(t->net, &p);
if (err) if (err)
return err; return err;
t = ipip6_tunnel_locate(t->net, &p, 0); t = ipip6_tunnel_locate(t->net, p, 0);
if (dev == dev_to_sit_net(dev)->fb_tunnel_dev) { if (dev == dev_to_sit_net(dev)->fb_tunnel_dev) {
if (!t) if (!t)
return -ENOENT; return -ENOENT;
@ -1329,33 +1314,28 @@ ipip6_tunnel_change(struct net_device *dev, struct ifreq *ifr)
if (t->dev != dev) if (t->dev != dev)
return -EEXIST; return -EEXIST;
} else { } else {
if (((dev->flags & IFF_POINTOPOINT) && !p.iph.daddr) || if (((dev->flags & IFF_POINTOPOINT) && !p->iph.daddr) ||
(!(dev->flags & IFF_POINTOPOINT) && p.iph.daddr)) (!(dev->flags & IFF_POINTOPOINT) && p->iph.daddr))
return -EINVAL; return -EINVAL;
t = netdev_priv(dev); t = netdev_priv(dev);
} }
ipip6_tunnel_update(t, &p, t->fwmark); ipip6_tunnel_update(t, p, t->fwmark);
} }
if (copy_to_user(ifr->ifr_ifru.ifru_data, &t->parms, sizeof(p)))
return -EFAULT;
return 0; return 0;
} }
static int static int
ipip6_tunnel_del(struct net_device *dev, struct ifreq *ifr) ipip6_tunnel_del(struct net_device *dev, struct ip_tunnel_parm *p)
{ {
struct ip_tunnel *t = netdev_priv(dev); struct ip_tunnel *t = netdev_priv(dev);
struct ip_tunnel_parm p;
if (!ns_capable(t->net->user_ns, CAP_NET_ADMIN)) if (!ns_capable(t->net->user_ns, CAP_NET_ADMIN))
return -EPERM; return -EPERM;
if (dev == dev_to_sit_net(dev)->fb_tunnel_dev) { if (dev == dev_to_sit_net(dev)->fb_tunnel_dev) {
if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof(p))) t = ipip6_tunnel_locate(t->net, p, 0);
return -EFAULT;
t = ipip6_tunnel_locate(t->net, &p, 0);
if (!t) if (!t)
return -ENOENT; return -ENOENT;
if (t == netdev_priv(dev_to_sit_net(dev)->fb_tunnel_dev)) if (t == netdev_priv(dev_to_sit_net(dev)->fb_tunnel_dev))
@ -1366,18 +1346,32 @@ ipip6_tunnel_del(struct net_device *dev, struct ifreq *ifr)
return 0; return 0;
} }
static int
ipip6_tunnel_ctl(struct net_device *dev, struct ip_tunnel_parm *p, int cmd)
{
switch (cmd) {
case SIOCGETTUNNEL:
return ipip6_tunnel_get(dev, p);
case SIOCADDTUNNEL:
return ipip6_tunnel_add(dev, p);
case SIOCCHGTUNNEL:
return ipip6_tunnel_change(dev, p);
case SIOCDELTUNNEL:
return ipip6_tunnel_del(dev, p);
default:
return -EINVAL;
}
}
static int static int
ipip6_tunnel_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) ipip6_tunnel_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
{ {
switch (cmd) { switch (cmd) {
case SIOCGETTUNNEL: case SIOCGETTUNNEL:
return ipip6_tunnel_get(dev, ifr);
case SIOCADDTUNNEL: case SIOCADDTUNNEL:
return ipip6_tunnel_add(dev, ifr);
case SIOCCHGTUNNEL: case SIOCCHGTUNNEL:
return ipip6_tunnel_change(dev, ifr);
case SIOCDELTUNNEL: case SIOCDELTUNNEL:
return ipip6_tunnel_del(dev, ifr); return ip_tunnel_ioctl(dev, ifr, cmd);
case SIOCGETPRL: case SIOCGETPRL:
return ipip6_tunnel_get_prl(dev, ifr); return ipip6_tunnel_get_prl(dev, ifr);
case SIOCADDPRL: case SIOCADDPRL:
@ -1404,6 +1398,7 @@ static const struct net_device_ops ipip6_netdev_ops = {
.ndo_do_ioctl = ipip6_tunnel_ioctl, .ndo_do_ioctl = ipip6_tunnel_ioctl,
.ndo_get_stats64 = ip_tunnel_get_stats64, .ndo_get_stats64 = ip_tunnel_get_stats64,
.ndo_get_iflink = ip_tunnel_get_iflink, .ndo_get_iflink = ip_tunnel_get_iflink,
.ndo_tunnel_ctl = ipip6_tunnel_ctl,
}; };
static void ipip6_dev_free(struct net_device *dev) static void ipip6_dev_free(struct net_device *dev)