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ipv4,appletalk: move SIOCADDRT and SIOCDELRT handling into ->compat_ioctl

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To prepare removing the global routing_ioctl hack start lifting the code
into the ipv4 and appletalk ->compat_ioctl handlers.  Unlike the existing
handler we don't bother copying in the name - there are no compat issues for
char arrays.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Christoph Hellwig
2020-05-18 08:28:08 +02:00
committed by David S. Miller
parent a500492354
commit dc13c8761c
4 changed files with 94 additions and 73 deletions
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49
net/appletalk/ddp.c
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@@ -57,6 +57,7 @@
#include <net/sock.h>
#include <net/tcp_states.h>
#include <net/route.h>
#include <net/compat.h>
#include <linux/atalk.h>
#include <linux/highmem.h>
@@ -1839,20 +1840,58 @@ static int atalk_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
#ifdef CONFIG_COMPAT
static int atalk_compat_routing_ioctl(struct sock *sk, unsigned int cmd,
struct compat_rtentry __user *ur)
{
compat_uptr_t rtdev;
struct rtentry rt;
if (copy_from_user(&rt.rt_dst, &ur->rt_dst,
3 * sizeof(struct sockaddr)) ||
get_user(rt.rt_flags, &ur->rt_flags) ||
get_user(rt.rt_metric, &ur->rt_metric) ||
get_user(rt.rt_mtu, &ur->rt_mtu) ||
get_user(rt.rt_window, &ur->rt_window) ||
get_user(rt.rt_irtt, &ur->rt_irtt) ||
get_user(rtdev, &ur->rt_dev))
return -EFAULT;
switch (cmd) {
case SIOCDELRT:
if (rt.rt_dst.sa_family != AF_APPLETALK)
return -EINVAL;
return atrtr_delete(&((struct sockaddr_at *)
&rt.rt_dst)->sat_addr);
case SIOCADDRT:
rt.rt_dev = compat_ptr(rtdev);
return atrtr_ioctl_addrt(&rt);
default:
return -EINVAL;
}
}
static int atalk_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
{
void __user *argp = compat_ptr(arg);
struct sock *sk = sock->sk;
switch (cmd) {
case SIOCADDRT:
case SIOCDELRT:
return atalk_compat_routing_ioctl(sk, cmd, argp);
/*
* SIOCATALKDIFADDR is a SIOCPROTOPRIVATE ioctl number, so we
* cannot handle it in common code. The data we access if ifreq
* here is compatible, so we can simply call the native
* handler.
*/
if (cmd == SIOCATALKDIFADDR)
return atalk_ioctl(sock, cmd, (unsigned long)compat_ptr(arg));
return -ENOIOCTLCMD;
case SIOCATALKDIFADDR:
return atalk_ioctl(sock, cmd, (unsigned long)argp);
default:
return -ENOIOCTLCMD;
}
}
#endif
#endif /* CONFIG_COMPAT */
static const struct net_proto_family atalk_family_ops = {