提交 32da477a 编写于 作者: E Eric W. Biederman 提交者: David S. Miller

[NET]: Don't implement dev_ifname32 inline

The current implementation of dev_ifname makes maintenance difficult
because updates to the implementation of the ioctl have to made in two
places.  So this patch updates dev_ifname32 to do a classic 32/64
structure conversion and call sys_ioctl like the rest of the
compat calls do.
Signed-off-by: NEric W. Biederman <ebiederm@xmission.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
上级 890d52d3
......@@ -324,22 +324,21 @@ struct ifconf32 {
static int dev_ifname32(unsigned int fd, unsigned int cmd, unsigned long arg)
{
struct net_device *dev;
struct ifreq32 ifr32;
struct ifreq __user *uifr;
int err;
if (copy_from_user(&ifr32, compat_ptr(arg), sizeof(ifr32)))
uifr = compat_alloc_user_space(sizeof(struct ifreq));
if (copy_in_user(uifr, compat_ptr(arg), sizeof(struct ifreq32)));
return -EFAULT;
dev = dev_get_by_index(ifr32.ifr_ifindex);
if (!dev)
return -ENODEV;
err = sys_ioctl(fd, SIOCGIFNAME, (unsigned long)uifr);
if (err)
return err;
strlcpy(ifr32.ifr_name, dev->name, sizeof(ifr32.ifr_name));
dev_put(dev);
err = copy_to_user(compat_ptr(arg), &ifr32, sizeof(ifr32));
return (err ? -EFAULT : 0);
if (copy_in_user(compat_ptr(arg), uifr, sizeof(struct ifreq32)))
return -EFAULT;
return 0;
}
static int dev_ifconf(unsigned int fd, unsigned int cmd, unsigned long arg)
......
Markdown is supported
0% .
You are about to add 0 people to the discussion. Proceed with caution.
先完成此消息的编辑!
想要评论请 注册