static void ipip_tunnel_uninit(struct net_device *dev) { if (dev == ipip_fb_tunnel_dev) { write_lock_bh(&ipip_lock); tunnels_wc[0] = NULL; write_unlock_bh(&ipip_lock); } else ipip_tunnel_unlink((struct ip_tunnel*)dev->priv); dev_put(dev); }
static void ipip_tunnel_destroy(struct device *dev) { if (dev == &ipip_fb_tunnel_dev) { tunnels_wc[0] = NULL; synchronize_bh(); } else { ipip_tunnel_unlink((struct ip_tunnel*)dev->priv); kfree(dev); MOD_DEC_USE_COUNT; } }
static void ipip_tunnel_uninit(struct net_device *dev) { struct net *net = dev_net(dev); struct ipip_net *ipn = net_generic(net, ipip_net_id); if (dev == ipn->fb_tunnel_dev) { write_lock_bh(&ipip_lock); ipn->tunnels_wc[0] = NULL; write_unlock_bh(&ipip_lock); } else ipip_tunnel_unlink(ipn, netdev_priv(dev)); dev_put(dev); }
static int ipip_tunnel_ioctl (struct device *dev, struct ifreq *ifr, int cmd) { int err = 0; struct ip_tunnel_parm p; struct ip_tunnel *t; MOD_INC_USE_COUNT; switch (cmd) { case SIOCGETTUNNEL: t = NULL; if (dev == &ipip_fb_tunnel_dev) { if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof(p))) { err = -EFAULT; break; } t = ipip_tunnel_locate(&p, 0); } if (t == NULL) t = (struct ip_tunnel*)dev->priv; memcpy(&p, &t->parms, sizeof(p)); if (copy_to_user(ifr->ifr_ifru.ifru_data, &p, sizeof(p))) err = -EFAULT; break; case SIOCADDTUNNEL: case SIOCCHGTUNNEL: err = -EPERM; if (!capable(CAP_NET_ADMIN)) goto done; err = -EFAULT; if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof(p))) goto done; err = -EINVAL; if (p.iph.version != 4 || p.iph.protocol != IPPROTO_IPIP || p.iph.ihl != 5 || (p.iph.frag_off&__constant_htons(~IP_DF))) goto done; if (p.iph.ttl) p.iph.frag_off |= __constant_htons(IP_DF); t = ipip_tunnel_locate(&p, cmd == SIOCADDTUNNEL); if (dev != &ipip_fb_tunnel_dev && cmd == SIOCCHGTUNNEL && t != &ipip_fb_tunnel) { if (t != NULL) { if (t->dev != dev) { err = -EEXIST; break; } } else { if (((dev->flags&IFF_POINTOPOINT) && !p.iph.daddr) || (!(dev->flags&IFF_POINTOPOINT) && p.iph.daddr)) { err = -EINVAL; break; } t = (struct ip_tunnel*)dev->priv; start_bh_atomic(); ipip_tunnel_unlink(t); t->parms.iph.saddr = p.iph.saddr; t->parms.iph.daddr = p.iph.daddr; memcpy(dev->dev_addr, &p.iph.saddr, 4); memcpy(dev->broadcast, &p.iph.daddr, 4); ipip_tunnel_link(t); end_bh_atomic(); netdev_state_change(dev); } } if (t) { err = 0; if (cmd == SIOCCHGTUNNEL) { t->parms.iph.ttl = p.iph.ttl; t->parms.iph.tos = p.iph.tos; t->parms.iph.frag_off = p.iph.frag_off; } if (copy_to_user(ifr->ifr_ifru.ifru_data, &t->parms, sizeof(p))) err = -EFAULT; } else err = (cmd == SIOCADDTUNNEL ? -ENOBUFS : -ENOENT); break; case SIOCDELTUNNEL: err = -EPERM; if (!capable(CAP_NET_ADMIN)) goto done; if (dev == &ipip_fb_tunnel_dev) { err = -EFAULT; if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof(p))) goto done; err = -ENOENT; if ((t = ipip_tunnel_locate(&p, 0)) == NULL) goto done; err = -EPERM; if (t == &ipip_fb_tunnel) goto done; } err = unregister_netdevice(dev); break; default: err = -EINVAL; } done: MOD_DEC_USE_COUNT; return err; }