diff options
| author | Christoph Hellwig <hch@lst.de> | 2020-05-19 15:03:13 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2020-05-19 15:45:11 -0700 |
| commit | 607259a695312cdfac2b52fb9d5b5890c834d573 (patch) | |
| tree | 25cf11dce13ddc9c82fb0f3f2f886c697b46227e /net/ipv4/ipip.c | |
| parent | c1fd1182c43692022a7938d6b496fa21fcd49717 (diff) | |
| download | linux-607259a695312cdfac2b52fb9d5b5890c834d573.tar.bz2 | |
net: add a new ndo_tunnel_ioctl method
This method is used to properly allow kernel callers of the IPv4 route
management ioctls. The exsting ip_tunnel_ioctl helper is renamed to
ip_tunnel_ctl to better reflect that it doesn't directly implement ioctls
touching user memory, and is used for the guts of ndo_tunnel_ctl
implementations. A new ip_tunnel_ioctl helper is added that can be wired
up directly to the ndo_do_ioctl method and takes care of the copy to and
from userspace.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/ipip.c')
| -rw-r--r-- | net/ipv4/ipip.c | 30 |
1 files changed, 9 insertions, 21 deletions
diff --git a/net/ipv4/ipip.c b/net/ipv4/ipip.c index 2f01cf6fa0de..df663baf2516 100644 --- a/net/ipv4/ipip.c +++ b/net/ipv4/ipip.c @@ -327,41 +327,29 @@ static bool ipip_tunnel_ioctl_verify_protocol(u8 ipproto) } static int -ipip_tunnel_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) +ipip_tunnel_ctl(struct net_device *dev, struct ip_tunnel_parm *p, int cmd) { - int err = 0; - struct ip_tunnel_parm p; - - if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof(p))) - return -EFAULT; - if (cmd == SIOCADDTUNNEL || cmd == SIOCCHGTUNNEL) { - if (p.iph.version != 4 || - !ipip_tunnel_ioctl_verify_protocol(p.iph.protocol) || - p.iph.ihl != 5 || (p.iph.frag_off&htons(~IP_DF))) + if (p->iph.version != 4 || + !ipip_tunnel_ioctl_verify_protocol(p->iph.protocol) || + p->iph.ihl != 5 || (p->iph.frag_off & htons(~IP_DF))) return -EINVAL; } - p.i_key = p.o_key = 0; - p.i_flags = p.o_flags = 0; - err = ip_tunnel_ioctl(dev, &p, cmd); - if (err) - return err; - - if (copy_to_user(ifr->ifr_ifru.ifru_data, &p, sizeof(p))) - return -EFAULT; - - return 0; + p->i_key = p->o_key = 0; + p->i_flags = p->o_flags = 0; + return ip_tunnel_ctl(dev, p, cmd); } static const struct net_device_ops ipip_netdev_ops = { .ndo_init = ipip_tunnel_init, .ndo_uninit = ip_tunnel_uninit, .ndo_start_xmit = ipip_tunnel_xmit, - .ndo_do_ioctl = ipip_tunnel_ioctl, + .ndo_do_ioctl = ip_tunnel_ioctl, .ndo_change_mtu = ip_tunnel_change_mtu, .ndo_get_stats64 = ip_tunnel_get_stats64, .ndo_get_iflink = ip_tunnel_get_iflink, + .ndo_tunnel_ctl = ipip_tunnel_ctl, }; #define IPIP_FEATURES (NETIF_F_SG | \ |