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/ip_vti.c | |
| parent | ipv4: consolidate the VIFF_TUNNEL handling in ipmr_new_tunnel (diff) | |
| download | wireguard-linux-607259a695312cdfac2b52fb9d5b5890c834d573.tar.xz wireguard-linux-607259a695312cdfac2b52fb9d5b5890c834d573.zip | |
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/ip_vti.c')
| -rw-r--r-- | net/ipv4/ip_vti.c | 32 |
1 files changed, 13 insertions, 19 deletions
diff --git a/net/ipv4/ip_vti.c b/net/ipv4/ip_vti.c index 1b4e6f298648..c8974360a99f 100644 --- a/net/ipv4/ip_vti.c +++ b/net/ipv4/ip_vti.c @@ -378,38 +378,31 @@ static int vti4_err(struct sk_buff *skb, u32 info) } static int -vti_tunnel_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) +vti_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 || p.iph.protocol != IPPROTO_IPIP || - p.iph.ihl != 5) + if (p->iph.version != 4 || p->iph.protocol != IPPROTO_IPIP || + p->iph.ihl != 5) return -EINVAL; } - if (!(p.i_flags & GRE_KEY)) - p.i_key = 0; - if (!(p.o_flags & GRE_KEY)) - p.o_key = 0; + if (!(p->i_flags & GRE_KEY)) + p->i_key = 0; + if (!(p->o_flags & GRE_KEY)) + p->o_key = 0; - p.i_flags = VTI_ISVTI; + p->i_flags = VTI_ISVTI; - err = ip_tunnel_ioctl(dev, &p, cmd); + err = ip_tunnel_ctl(dev, p, cmd); if (err) return err; if (cmd != SIOCDELTUNNEL) { - p.i_flags |= GRE_KEY; - p.o_flags |= GRE_KEY; + p->i_flags |= GRE_KEY; + p->o_flags |= GRE_KEY; } - - if (copy_to_user(ifr->ifr_ifru.ifru_data, &p, sizeof(p))) - return -EFAULT; return 0; } @@ -417,10 +410,11 @@ static const struct net_device_ops vti_netdev_ops = { .ndo_init = vti_tunnel_init, .ndo_uninit = ip_tunnel_uninit, .ndo_start_xmit = vti_tunnel_xmit, - .ndo_do_ioctl = vti_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 = vti_tunnel_ctl, }; static void vti_tunnel_setup(struct net_device *dev) |