diff options
Diffstat (limited to 'net/ipv4/arp.c')
| -rw-r--r-- | net/ipv4/arp.c | 65 |
1 files changed, 34 insertions, 31 deletions
diff --git a/net/ipv4/arp.c b/net/ipv4/arp.c index d8e540c5b071..1b74d3b64371 100644 --- a/net/ipv4/arp.c +++ b/net/ipv4/arp.c @@ -215,6 +215,9 @@ int arp_mc_map(__be32 addr, u8 *haddr, struct net_device *dev, int dir) case ARPHRD_INFINIBAND: ip_ib_mc_map(addr, dev->broadcast, haddr); return 0; + case ARPHRD_IPGRE: + ip_ipgre_mc_map(addr, dev->broadcast, haddr); + return 0; default: if (dir) { memcpy(haddr, dev->broadcast, dev->addr_len); @@ -433,14 +436,13 @@ static int arp_ignore(struct in_device *in_dev, __be32 sip, __be32 tip) static int arp_filter(__be32 sip, __be32 tip, struct net_device *dev) { - struct flowi fl = { .nl_u = { .ip4_u = { .daddr = sip, - .saddr = tip } } }; struct rtable *rt; int flag = 0; /*unsigned long now; */ struct net *net = dev_net(dev); - if (ip_route_output_key(net, &rt, &fl) < 0) + rt = ip_route_output(net, sip, tip, 0, 0); + if (IS_ERR(rt)) return 1; if (rt->dst.dev != dev) { NET_INC_STATS_BH(net, LINUX_MIB_ARPFILTER); @@ -883,7 +885,7 @@ static int arp_process(struct sk_buff *skb) dont_send = arp_ignore(in_dev, sip, tip); if (!dont_send && IN_DEV_ARPFILTER(in_dev)) - dont_send |= arp_filter(sip, tip, dev); + dont_send = arp_filter(sip, tip, dev); if (!dont_send) { n = neigh_event_ns(&arp_tbl, sha, &sip, dev); if (n) { @@ -1033,7 +1035,7 @@ static int arp_req_set_public(struct net *net, struct arpreq *r, if (mask && mask != htonl(0xFFFFFFFF)) return -EINVAL; if (!dev && (r->arp_flags & ATF_COM)) { - dev = dev_getbyhwaddr(net, r->arp_ha.sa_family, + dev = dev_getbyhwaddr_rcu(net, r->arp_ha.sa_family, r->arp_ha.sa_data); if (!dev) return -ENODEV; @@ -1061,12 +1063,10 @@ static int arp_req_set(struct net *net, struct arpreq *r, if (r->arp_flags & ATF_PERM) r->arp_flags |= ATF_COM; if (dev == NULL) { - struct flowi fl = { .nl_u.ip4_u = { .daddr = ip, - .tos = RTO_ONLINK } }; - struct rtable *rt; - err = ip_route_output_key(net, &rt, &fl); - if (err != 0) - return err; + struct rtable *rt = ip_route_output(net, ip, 0, RTO_ONLINK, 0); + + if (IS_ERR(rt)) + return PTR_ERR(rt); dev = rt->dst.dev; ip_rt_put(rt); if (!dev) @@ -1142,6 +1142,23 @@ static int arp_req_get(struct arpreq *r, struct net_device *dev) return err; } +int arp_invalidate(struct net_device *dev, __be32 ip) +{ + struct neighbour *neigh = neigh_lookup(&arp_tbl, &ip, dev); + int err = -ENXIO; + + if (neigh) { + if (neigh->nud_state & ~NUD_NOARP) + err = neigh_update(neigh, NULL, NUD_FAILED, + NEIGH_UPDATE_F_OVERRIDE| + NEIGH_UPDATE_F_ADMIN); + neigh_release(neigh); + } + + return err; +} +EXPORT_SYMBOL(arp_invalidate); + static int arp_req_delete_public(struct net *net, struct arpreq *r, struct net_device *dev) { @@ -1160,36 +1177,22 @@ static int arp_req_delete_public(struct net *net, struct arpreq *r, static int arp_req_delete(struct net *net, struct arpreq *r, struct net_device *dev) { - int err; __be32 ip; - struct neighbour *neigh; if (r->arp_flags & ATF_PUBL) return arp_req_delete_public(net, r, dev); ip = ((struct sockaddr_in *)&r->arp_pa)->sin_addr.s_addr; if (dev == NULL) { - struct flowi fl = { .nl_u.ip4_u = { .daddr = ip, - .tos = RTO_ONLINK } }; - struct rtable *rt; - err = ip_route_output_key(net, &rt, &fl); - if (err != 0) - return err; + struct rtable *rt = ip_route_output(net, ip, 0, RTO_ONLINK, 0); + if (IS_ERR(rt)) + return PTR_ERR(rt); dev = rt->dst.dev; ip_rt_put(rt); if (!dev) return -EINVAL; } - err = -ENXIO; - neigh = neigh_lookup(&arp_tbl, &ip, dev); - if (neigh) { - if (neigh->nud_state & ~NUD_NOARP) - err = neigh_update(neigh, NULL, NUD_FAILED, - NEIGH_UPDATE_F_OVERRIDE| - NEIGH_UPDATE_F_ADMIN); - neigh_release(neigh); - } - return err; + return arp_invalidate(dev, ip); } /* @@ -1252,12 +1255,12 @@ int arp_ioctl(struct net *net, unsigned int cmd, void __user *arg) break; case SIOCGARP: err = arp_req_get(&r, dev); - if (!err && copy_to_user(arg, &r, sizeof(r))) - err = -EFAULT; break; } out: rtnl_unlock(); + if (cmd == SIOCGARP && !err && copy_to_user(arg, &r, sizeof(r))) + err = -EFAULT; return err; } |