diff options
| author | Eric W. Biederman <ebiederm@xmission.com> | 2007-09-12 13:37:03 +0400 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2007-10-11 03:49:03 +0400 |
| commit | 32da477a5bfe96b6dfc8960e0d22d89ca09fd10a (patch) | |
| tree | f4a8e5ec43d0a5ba85a66f12cd23c09a2ab689a7 | |
| parent | 890d52d3f1e28888c4122e120426588f5ad63d37 (diff) | |
| download | linux-32da477a5bfe96b6dfc8960e0d22d89ca09fd10a.tar.xz | |
[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: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | fs/compat_ioctl.c | 21 |
1 files changed, 10 insertions, 11 deletions
diff --git a/fs/compat_ioctl.c b/fs/compat_ioctl.c index 37310b0e8107..d917e4a26a43 100644 --- a/fs/compat_ioctl.c +++ b/fs/compat_ioctl.c @@ -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) |