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lift handling of SIOCIW... out of dev_ioctl()

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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2017-10-01 20:13:08 -04:00
parent 4cf808e7ac
commit b1b0c24506
4 changed files with 12 additions and 25 deletions
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18
net/core/dev_ioctl.c
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@ -411,24 +411,6 @@ int dev_ioctl(struct net *net, unsigned int cmd, void __user *arg)
if (cmd == SIOCGIFNAME)
return dev_ifname(net, (struct ifreq __user *)arg);
/*
* Take care of Wireless Extensions. Unfortunately struct iwreq
* isn't a proper subset of struct ifreq (it's 8 byte shorter)
* so we need to treat it specially, otherwise applications may
* fault if the struct they're passing happens to land at the
* end of a mapped page.
*/
if (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST) {
struct iwreq iwr;
if (copy_from_user(&iwr, arg, sizeof(iwr)))
return -EFAULT;
iwr.ifr_name[sizeof(iwr.ifr_name) - 1] = 0;
return wext_handle_ioctl(net, &iwr, cmd, arg);
}
if (copy_from_user(&ifr, arg, sizeof(struct ifreq)))
return -EFAULT;