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Diffstat (limited to 'net/ipv4/ip_gre.c')
-rw-r--r--net/ipv4/ip_gre.c487
1 files changed, 439 insertions, 48 deletions
diff --git a/net/ipv4/ip_gre.c b/net/ipv4/ip_gre.c
index 2a61158ea722..85c487b8572b 100644
--- a/net/ipv4/ip_gre.c
+++ b/net/ipv4/ip_gre.c
@@ -27,6 +27,7 @@
#include <linux/inetdevice.h>
#include <linux/igmp.h>
#include <linux/netfilter_ipv4.h>
+#include <linux/etherdevice.h>
#include <linux/if_ether.h>
#include <net/sock.h>
@@ -41,6 +42,7 @@
#include <net/xfrm.h>
#include <net/net_namespace.h>
#include <net/netns/generic.h>
+#include <net/rtnetlink.h>
#ifdef CONFIG_IPV6
#include <net/ipv6.h>
@@ -117,8 +119,10 @@
Alexey Kuznetsov.
*/
+static struct rtnl_link_ops ipgre_link_ops __read_mostly;
static int ipgre_tunnel_init(struct net_device *dev);
static void ipgre_tunnel_setup(struct net_device *dev);
+static int ipgre_tunnel_bind_dev(struct net_device *dev);
/* Fallback tunnel: no source, no destination, no key, no options */
@@ -163,38 +167,64 @@ static DEFINE_RWLOCK(ipgre_lock);
/* Given src, dst and key, find appropriate for input tunnel. */
static struct ip_tunnel * ipgre_tunnel_lookup(struct net *net,
- __be32 remote, __be32 local, __be32 key)
+ __be32 remote, __be32 local,
+ __be32 key, __be16 gre_proto)
{
unsigned h0 = HASH(remote);
unsigned h1 = HASH(key);
struct ip_tunnel *t;
+ struct ip_tunnel *t2 = NULL;
struct ipgre_net *ign = net_generic(net, ipgre_net_id);
+ int dev_type = (gre_proto == htons(ETH_P_TEB)) ?
+ ARPHRD_ETHER : ARPHRD_IPGRE;
for (t = ign->tunnels_r_l[h0^h1]; t; t = t->next) {
if (local == t->parms.iph.saddr && remote == t->parms.iph.daddr) {
- if (t->parms.i_key == key && (t->dev->flags&IFF_UP))
- return t;
+ if (t->parms.i_key == key && t->dev->flags & IFF_UP) {
+ if (t->dev->type == dev_type)
+ return t;
+ if (t->dev->type == ARPHRD_IPGRE && !t2)
+ t2 = t;
+ }
}
}
+
for (t = ign->tunnels_r[h0^h1]; t; t = t->next) {
if (remote == t->parms.iph.daddr) {
- if (t->parms.i_key == key && (t->dev->flags&IFF_UP))
- return t;
+ if (t->parms.i_key == key && t->dev->flags & IFF_UP) {
+ if (t->dev->type == dev_type)
+ return t;
+ if (t->dev->type == ARPHRD_IPGRE && !t2)
+ t2 = t;
+ }
}
}
+
for (t = ign->tunnels_l[h1]; t; t = t->next) {
if (local == t->parms.iph.saddr ||
(local == t->parms.iph.daddr &&
ipv4_is_multicast(local))) {
- if (t->parms.i_key == key && (t->dev->flags&IFF_UP))
- return t;
+ if (t->parms.i_key == key && t->dev->flags & IFF_UP) {
+ if (t->dev->type == dev_type)
+ return t;
+ if (t->dev->type == ARPHRD_IPGRE && !t2)
+ t2 = t;
+ }
}
}
+
for (t = ign->tunnels_wc[h1]; t; t = t->next) {
- if (t->parms.i_key == key && (t->dev->flags&IFF_UP))
- return t;
+ if (t->parms.i_key == key && t->dev->flags & IFF_UP) {
+ if (t->dev->type == dev_type)
+ return t;
+ if (t->dev->type == ARPHRD_IPGRE && !t2)
+ t2 = t;
+ }
}
+ if (t2)
+ return t2;
+
if (ign->fb_tunnel_dev->flags&IFF_UP)
return netdev_priv(ign->fb_tunnel_dev);
return NULL;
@@ -249,25 +279,37 @@ static void ipgre_tunnel_unlink(struct ipgre_net *ign, struct ip_tunnel *t)
}
}
-static struct ip_tunnel * ipgre_tunnel_locate(struct net *net,
- struct ip_tunnel_parm *parms, int create)
+static struct ip_tunnel *ipgre_tunnel_find(struct net *net,
+ struct ip_tunnel_parm *parms,
+ int type)
{
__be32 remote = parms->iph.daddr;
__be32 local = parms->iph.saddr;
__be32 key = parms->i_key;
- struct ip_tunnel *t, **tp, *nt;
+ struct ip_tunnel *t, **tp;
+ struct ipgre_net *ign = net_generic(net, ipgre_net_id);
+
+ for (tp = __ipgre_bucket(ign, parms); (t = *tp) != NULL; tp = &t->next)
+ if (local == t->parms.iph.saddr &&
+ remote == t->parms.iph.daddr &&
+ key == t->parms.i_key &&
+ type == t->dev->type)
+ break;
+
+ return t;
+}
+
+static struct ip_tunnel * ipgre_tunnel_locate(struct net *net,
+ struct ip_tunnel_parm *parms, int create)
+{
+ struct ip_tunnel *t, *nt;
struct net_device *dev;
char name[IFNAMSIZ];
struct ipgre_net *ign = net_generic(net, ipgre_net_id);
- for (tp = __ipgre_bucket(ign, parms); (t = *tp) != NULL; tp = &t->next) {
- if (local == t->parms.iph.saddr && remote == t->parms.iph.daddr) {
- if (key == t->parms.i_key)
- return t;
- }
- }
- if (!create)
- return NULL;
+ t = ipgre_tunnel_find(net, parms, ARPHRD_IPGRE);
+ if (t || !create)
+ return t;
if (parms->name[0])
strlcpy(name, parms->name, IFNAMSIZ);
@@ -285,9 +327,11 @@ static struct ip_tunnel * ipgre_tunnel_locate(struct net *net,
goto failed_free;
}
- dev->init = ipgre_tunnel_init;
nt = netdev_priv(dev);
nt->parms = *parms;
+ dev->rtnl_link_ops = &ipgre_link_ops;
+
+ dev->mtu = ipgre_tunnel_bind_dev(dev);
if (register_netdevice(dev) < 0)
goto failed_free;
@@ -380,8 +424,9 @@ static void ipgre_err(struct sk_buff *skb, u32 info)
read_lock(&ipgre_lock);
t = ipgre_tunnel_lookup(dev_net(skb->dev), iph->daddr, iph->saddr,
- (flags&GRE_KEY) ?
- *(((__be32*)p) + (grehlen>>2) - 1) : 0);
+ flags & GRE_KEY ?
+ *(((__be32 *)p) + (grehlen / 4) - 1) : 0,
+ p[1]);
if (t == NULL || t->parms.iph.daddr == 0 ||
ipv4_is_multicast(t->parms.iph.daddr))
goto out;
@@ -431,6 +476,8 @@ static int ipgre_rcv(struct sk_buff *skb)
u32 seqno = 0;
struct ip_tunnel *tunnel;
int offset = 4;
+ __be16 gre_proto;
+ unsigned int len;
if (!pskb_may_pull(skb, 16))
goto drop_nolock;
@@ -470,20 +517,22 @@ static int ipgre_rcv(struct sk_buff *skb)
}
}
+ gre_proto = *(__be16 *)(h + 2);
+
read_lock(&ipgre_lock);
if ((tunnel = ipgre_tunnel_lookup(dev_net(skb->dev),
- iph->saddr, iph->daddr, key)) != NULL) {
+ iph->saddr, iph->daddr, key,
+ gre_proto))) {
struct net_device_stats *stats = &tunnel->dev->stats;
secpath_reset(skb);
- skb->protocol = *(__be16*)(h + 2);
+ skb->protocol = gre_proto;
/* WCCP version 1 and 2 protocol decoding.
* - Change protocol to IP
* - When dealing with WCCPv2, Skip extra 4 bytes in GRE header
*/
- if (flags == 0 &&
- skb->protocol == htons(ETH_P_WCCP)) {
+ if (flags == 0 && gre_proto == htons(ETH_P_WCCP)) {
skb->protocol = htons(ETH_P_IP);
if ((*(h + offset) & 0xF0) != 0x40)
offset += 4;
@@ -491,7 +540,6 @@ static int ipgre_rcv(struct sk_buff *skb)
skb->mac_header = skb->network_header;
__pskb_pull(skb, offset);
- skb_reset_network_header(skb);
skb_postpull_rcsum(skb, skb_transport_header(skb), offset);
skb->pkt_type = PACKET_HOST;
#ifdef CONFIG_NET_IPGRE_BROADCAST
@@ -519,13 +567,32 @@ static int ipgre_rcv(struct sk_buff *skb)
}
tunnel->i_seqno = seqno + 1;
}
+
+ len = skb->len;
+
+ /* Warning: All skb pointers will be invalidated! */
+ if (tunnel->dev->type == ARPHRD_ETHER) {
+ if (!pskb_may_pull(skb, ETH_HLEN)) {
+ stats->rx_length_errors++;
+ stats->rx_errors++;
+ goto drop;
+ }
+
+ iph = ip_hdr(skb);
+ skb->protocol = eth_type_trans(skb, tunnel->dev);
+ skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN);
+ }
+
stats->rx_packets++;
- stats->rx_bytes += skb->len;
+ stats->rx_bytes += len;
skb->dev = tunnel->dev;
dst_release(skb->dst);
skb->dst = NULL;
nf_reset(skb);
+
+ skb_reset_network_header(skb);
ipgre_ecn_decapsulate(iph, skb);
+
netif_rx(skb);
read_unlock(&ipgre_lock);
return(0);
@@ -560,7 +627,10 @@ static int ipgre_tunnel_xmit(struct sk_buff *skb, struct net_device *dev)
goto tx_error;
}
- if (dev->header_ops) {
+ if (dev->type == ARPHRD_ETHER)
+ IPCB(skb)->flags = 0;
+
+ if (dev->header_ops && dev->type == ARPHRD_IPGRE) {
gre_hlen = 0;
tiph = (struct iphdr*)skb->data;
} else {
@@ -637,7 +707,7 @@ static int ipgre_tunnel_xmit(struct sk_buff *skb, struct net_device *dev)
df = tiph->frag_off;
if (df)
- mtu = dst_mtu(&rt->u.dst) - tunnel->hlen;
+ mtu = dst_mtu(&rt->u.dst) - dev->hard_header_len - tunnel->hlen;
else
mtu = skb->dst ? dst_mtu(skb->dst) : dev->mtu;
@@ -703,7 +773,7 @@ static int ipgre_tunnel_xmit(struct sk_buff *skb, struct net_device *dev)
old_iph = ip_hdr(skb);
}
- skb->transport_header = skb->network_header;
+ skb_reset_transport_header(skb);
skb_push(skb, gre_hlen);
skb_reset_network_header(skb);
memset(&(IPCB(skb)->opt), 0, sizeof(IPCB(skb)->opt));
@@ -736,8 +806,9 @@ static int ipgre_tunnel_xmit(struct sk_buff *skb, struct net_device *dev)
iph->ttl = dst_metric(&rt->u.dst, RTAX_HOPLIMIT);
}
- ((__be16*)(iph+1))[0] = tunnel->parms.o_flags;
- ((__be16*)(iph+1))[1] = skb->protocol;
+ ((__be16 *)(iph + 1))[0] = tunnel->parms.o_flags;
+ ((__be16 *)(iph + 1))[1] = (dev->type == ARPHRD_ETHER) ?
+ htons(ETH_P_TEB) : skb->protocol;
if (tunnel->parms.o_flags&(GRE_KEY|GRE_CSUM|GRE_SEQ)) {
__be32 *ptr = (__be32*)(((u8*)iph) + tunnel->hlen - 4);
@@ -773,7 +844,7 @@ tx_error:
return 0;
}
-static void ipgre_tunnel_bind_dev(struct net_device *dev)
+static int ipgre_tunnel_bind_dev(struct net_device *dev)
{
struct net_device *tdev = NULL;
struct ip_tunnel *tunnel;
@@ -785,7 +856,7 @@ static void ipgre_tunnel_bind_dev(struct net_device *dev)
tunnel = netdev_priv(dev);
iph = &tunnel->parms.iph;
- /* Guess output device to choose reasonable mtu and hard_header_len */
+ /* Guess output device to choose reasonable mtu and needed_headroom */
if (iph->daddr) {
struct flowi fl = { .oif = tunnel->parms.link,
@@ -799,14 +870,16 @@ static void ipgre_tunnel_bind_dev(struct net_device *dev)
tdev = rt->u.dst.dev;
ip_rt_put(rt);
}
- dev->flags |= IFF_POINTOPOINT;
+
+ if (dev->type != ARPHRD_ETHER)
+ dev->flags |= IFF_POINTOPOINT;
}
if (!tdev && tunnel->parms.link)
tdev = __dev_get_by_index(dev_net(dev), tunnel->parms.link);
if (tdev) {
- hlen = tdev->hard_header_len;
+ hlen = tdev->hard_header_len + tdev->needed_headroom;
mtu = tdev->mtu;
}
dev->iflink = tunnel->parms.link;
@@ -820,10 +893,15 @@ static void ipgre_tunnel_bind_dev(struct net_device *dev)
if (tunnel->parms.o_flags&GRE_SEQ)
addend += 4;
}
- dev->hard_header_len = hlen + addend;
- dev->mtu = mtu - addend;
+ dev->needed_headroom = addend + hlen;
+ mtu -= dev->hard_header_len - addend;
+
+ if (mtu < 68)
+ mtu = 68;
+
tunnel->hlen = addend;
+ return mtu;
}
static int
@@ -917,7 +995,7 @@ ipgre_tunnel_ioctl (struct net_device *dev, struct ifreq *ifr, int cmd)
t->parms.iph.frag_off = p.iph.frag_off;
if (t->parms.link != p.link) {
t->parms.link = p.link;
- ipgre_tunnel_bind_dev(dev);
+ dev->mtu = ipgre_tunnel_bind_dev(dev);
netdev_state_change(dev);
}
}
@@ -959,7 +1037,8 @@ done:
static int ipgre_tunnel_change_mtu(struct net_device *dev, int new_mtu)
{
struct ip_tunnel *tunnel = netdev_priv(dev);
- if (new_mtu < 68 || new_mtu > 0xFFF8 - tunnel->hlen)
+ if (new_mtu < 68 ||
+ new_mtu > 0xFFF8 - dev->hard_header_len - tunnel->hlen)
return -EINVAL;
dev->mtu = new_mtu;
return 0;
@@ -1078,6 +1157,7 @@ static int ipgre_close(struct net_device *dev)
static void ipgre_tunnel_setup(struct net_device *dev)
{
+ dev->init = ipgre_tunnel_init;
dev->uninit = ipgre_tunnel_uninit;
dev->destructor = free_netdev;
dev->hard_start_xmit = ipgre_tunnel_xmit;
@@ -1085,7 +1165,7 @@ static void ipgre_tunnel_setup(struct net_device *dev)
dev->change_mtu = ipgre_tunnel_change_mtu;
dev->type = ARPHRD_IPGRE;
- dev->hard_header_len = LL_MAX_HEADER + sizeof(struct iphdr) + 4;
+ dev->needed_headroom = LL_MAX_HEADER + sizeof(struct iphdr) + 4;
dev->mtu = ETH_DATA_LEN - sizeof(struct iphdr) - 4;
dev->flags = IFF_NOARP;
dev->iflink = 0;
@@ -1107,8 +1187,6 @@ static int ipgre_tunnel_init(struct net_device *dev)
memcpy(dev->dev_addr, &tunnel->parms.iph.saddr, 4);
memcpy(dev->broadcast, &tunnel->parms.iph.daddr, 4);
- ipgre_tunnel_bind_dev(dev);
-
if (iph->daddr) {
#ifdef CONFIG_NET_IPGRE_BROADCAST
if (ipv4_is_multicast(iph->daddr)) {
@@ -1189,6 +1267,7 @@ static int ipgre_init_net(struct net *net)
ign->fb_tunnel_dev->init = ipgre_fb_tunnel_init;
dev_net_set(ign->fb_tunnel_dev, net);
+ ign->fb_tunnel_dev->rtnl_link_ops = &ipgre_link_ops;
if ((err = register_netdev(ign->fb_tunnel_dev)))
goto err_reg_dev;
@@ -1221,6 +1300,298 @@ static struct pernet_operations ipgre_net_ops = {
.exit = ipgre_exit_net,
};
+static int ipgre_tunnel_validate(struct nlattr *tb[], struct nlattr *data[])
+{
+ __be16 flags;
+
+ if (!data)
+ return 0;
+
+ flags = 0;
+ if (data[IFLA_GRE_IFLAGS])
+ flags |= nla_get_be16(data[IFLA_GRE_IFLAGS]);
+ if (data[IFLA_GRE_OFLAGS])
+ flags |= nla_get_be16(data[IFLA_GRE_OFLAGS]);
+ if (flags & (GRE_VERSION|GRE_ROUTING))
+ return -EINVAL;
+
+ return 0;
+}
+
+static int ipgre_tap_validate(struct nlattr *tb[], struct nlattr *data[])
+{
+ __be32 daddr;
+
+ if (tb[IFLA_ADDRESS]) {
+ if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
+ return -EINVAL;
+ if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
+ return -EADDRNOTAVAIL;
+ }
+
+ if (!data)
+ goto out;
+
+ if (data[IFLA_GRE_REMOTE]) {
+ memcpy(&daddr, nla_data(data[IFLA_GRE_REMOTE]), 4);
+ if (!daddr)
+ return -EINVAL;
+ }
+
+out:
+ return ipgre_tunnel_validate(tb, data);
+}
+
+static void ipgre_netlink_parms(struct nlattr *data[],
+ struct ip_tunnel_parm *parms)
+{
+ memset(parms, 0, sizeof(*parms));
+
+ parms->iph.protocol = IPPROTO_GRE;
+
+ if (!data)
+ return;
+
+ if (data[IFLA_GRE_LINK])
+ parms->link = nla_get_u32(data[IFLA_GRE_LINK]);
+
+ if (data[IFLA_GRE_IFLAGS])
+ parms->i_flags = nla_get_be16(data[IFLA_GRE_IFLAGS]);
+
+ if (data[IFLA_GRE_OFLAGS])
+ parms->o_flags = nla_get_be16(data[IFLA_GRE_OFLAGS]);
+
+ if (data[IFLA_GRE_IKEY])
+ parms->i_key = nla_get_be32(data[IFLA_GRE_IKEY]);
+
+ if (data[IFLA_GRE_OKEY])
+ parms->o_key = nla_get_be32(data[IFLA_GRE_OKEY]);
+
+ if (data[IFLA_GRE_LOCAL])
+ parms->iph.saddr = nla_get_be32(data[IFLA_GRE_LOCAL]);
+
+ if (data[IFLA_GRE_REMOTE])
+ parms->iph.daddr = nla_get_be32(data[IFLA_GRE_REMOTE]);
+
+ if (data[IFLA_GRE_TTL])
+ parms->iph.ttl = nla_get_u8(data[IFLA_GRE_TTL]);
+
+ if (data[IFLA_GRE_TOS])
+ parms->iph.tos = nla_get_u8(data[IFLA_GRE_TOS]);
+
+ if (!data[IFLA_GRE_PMTUDISC] || nla_get_u8(data[IFLA_GRE_PMTUDISC]))
+ parms->iph.frag_off = htons(IP_DF);
+}
+
+static int ipgre_tap_init(struct net_device *dev)
+{
+ struct ip_tunnel *tunnel;
+
+ tunnel = netdev_priv(dev);
+
+ tunnel->dev = dev;
+ strcpy(tunnel->parms.name, dev->name);
+
+ ipgre_tunnel_bind_dev(dev);
+
+ return 0;
+}
+
+static void ipgre_tap_setup(struct net_device *dev)
+{
+
+ ether_setup(dev);
+
+ dev->init = ipgre_tap_init;
+ dev->uninit = ipgre_tunnel_uninit;
+ dev->destructor = free_netdev;
+ dev->hard_start_xmit = ipgre_tunnel_xmit;
+ dev->change_mtu = ipgre_tunnel_change_mtu;
+
+ dev->iflink = 0;
+ dev->features |= NETIF_F_NETNS_LOCAL;
+}
+
+static int ipgre_newlink(struct net_device *dev, struct nlattr *tb[],
+ struct nlattr *data[])
+{
+ struct ip_tunnel *nt;
+ struct net *net = dev_net(dev);
+ struct ipgre_net *ign = net_generic(net, ipgre_net_id);
+ int mtu;
+ int err;
+
+ nt = netdev_priv(dev);
+ ipgre_netlink_parms(data, &nt->parms);
+
+ if (ipgre_tunnel_find(net, &nt->parms, dev->type))
+ return -EEXIST;
+
+ if (dev->type == ARPHRD_ETHER && !tb[IFLA_ADDRESS])
+ random_ether_addr(dev->dev_addr);
+
+ mtu = ipgre_tunnel_bind_dev(dev);
+ if (!tb[IFLA_MTU])
+ dev->mtu = mtu;
+
+ err = register_netdevice(dev);
+ if (err)
+ goto out;
+
+ dev_hold(dev);
+ ipgre_tunnel_link(ign, nt);
+
+out:
+ return err;
+}
+
+static int ipgre_changelink(struct net_device *dev, struct nlattr *tb[],
+ struct nlattr *data[])
+{
+ struct ip_tunnel *t, *nt;
+ struct net *net = dev_net(dev);
+ struct ipgre_net *ign = net_generic(net, ipgre_net_id);
+ struct ip_tunnel_parm p;
+ int mtu;
+
+ if (dev == ign->fb_tunnel_dev)
+ return -EINVAL;
+
+ nt = netdev_priv(dev);
+ ipgre_netlink_parms(data, &p);
+
+ t = ipgre_tunnel_locate(net, &p, 0);
+
+ if (t) {
+ if (t->dev != dev)
+ return -EEXIST;
+ } else {
+ unsigned nflags = 0;
+
+ t = nt;
+
+ if (ipv4_is_multicast(p.iph.daddr))
+ nflags = IFF_BROADCAST;
+ else if (p.iph.daddr)
+ nflags = IFF_POINTOPOINT;
+
+ if ((dev->flags ^ nflags) &
+ (IFF_POINTOPOINT | IFF_BROADCAST))
+ return -EINVAL;
+
+ ipgre_tunnel_unlink(ign, t);
+ t->parms.iph.saddr = p.iph.saddr;
+ t->parms.iph.daddr = p.iph.daddr;
+ t->parms.i_key = p.i_key;
+ memcpy(dev->dev_addr, &p.iph.saddr, 4);
+ memcpy(dev->broadcast, &p.iph.daddr, 4);
+ ipgre_tunnel_link(ign, t);
+ netdev_state_change(dev);
+ }
+
+ t->parms.o_key = p.o_key;
+ t->parms.iph.ttl = p.iph.ttl;
+ t->parms.iph.tos = p.iph.tos;
+ t->parms.iph.frag_off = p.iph.frag_off;
+
+ if (t->parms.link != p.link) {
+ t->parms.link = p.link;
+ mtu = ipgre_tunnel_bind_dev(dev);
+ if (!tb[IFLA_MTU])
+ dev->mtu = mtu;
+ netdev_state_change(dev);
+ }
+
+ return 0;
+}
+
+static size_t ipgre_get_size(const struct net_device *dev)
+{
+ return
+ /* IFLA_GRE_LINK */
+ nla_total_size(4) +
+ /* IFLA_GRE_IFLAGS */
+ nla_total_size(2) +
+ /* IFLA_GRE_OFLAGS */
+ nla_total_size(2) +
+ /* IFLA_GRE_IKEY */
+ nla_total_size(4) +
+ /* IFLA_GRE_OKEY */
+ nla_total_size(4) +
+ /* IFLA_GRE_LOCAL */
+ nla_total_size(4) +
+ /* IFLA_GRE_REMOTE */
+ nla_total_size(4) +
+ /* IFLA_GRE_TTL */
+ nla_total_size(1) +
+ /* IFLA_GRE_TOS */
+ nla_total_size(1) +
+ /* IFLA_GRE_PMTUDISC */
+ nla_total_size(1) +
+ 0;
+}
+
+static int ipgre_fill_info(struct sk_buff *skb, const struct net_device *dev)
+{
+ struct ip_tunnel *t = netdev_priv(dev);
+ struct ip_tunnel_parm *p = &t->parms;
+
+ NLA_PUT_U32(skb, IFLA_GRE_LINK, p->link);
+ NLA_PUT_BE16(skb, IFLA_GRE_IFLAGS, p->i_flags);
+ NLA_PUT_BE16(skb, IFLA_GRE_OFLAGS, p->o_flags);
+ NLA_PUT_BE32(skb, IFLA_GRE_IKEY, p->i_key);
+ NLA_PUT_BE32(skb, IFLA_GRE_OKEY, p->o_key);
+ NLA_PUT_BE32(skb, IFLA_GRE_LOCAL, p->iph.saddr);
+ NLA_PUT_BE32(skb, IFLA_GRE_REMOTE, p->iph.daddr);
+ NLA_PUT_U8(skb, IFLA_GRE_TTL, p->iph.ttl);
+ NLA_PUT_U8(skb, IFLA_GRE_TOS, p->iph.tos);
+ NLA_PUT_U8(skb, IFLA_GRE_PMTUDISC, !!(p->iph.frag_off & htons(IP_DF)));
+
+ return 0;
+
+nla_put_failure:
+ return -EMSGSIZE;
+}
+
+static const struct nla_policy ipgre_policy[IFLA_GRE_MAX + 1] = {
+ [IFLA_GRE_LINK] = { .type = NLA_U32 },
+ [IFLA_GRE_IFLAGS] = { .type = NLA_U16 },
+ [IFLA_GRE_OFLAGS] = { .type = NLA_U16 },
+ [IFLA_GRE_IKEY] = { .type = NLA_U32 },
+ [IFLA_GRE_OKEY] = { .type = NLA_U32 },
+ [IFLA_GRE_LOCAL] = { .len = FIELD_SIZEOF(struct iphdr, saddr) },
+ [IFLA_GRE_REMOTE] = { .len = FIELD_SIZEOF(struct iphdr, daddr) },
+ [IFLA_GRE_TTL] = { .type = NLA_U8 },
+ [IFLA_GRE_TOS] = { .type = NLA_U8 },
+ [IFLA_GRE_PMTUDISC] = { .type = NLA_U8 },
+};
+
+static struct rtnl_link_ops ipgre_link_ops __read_mostly = {
+ .kind = "gre",
+ .maxtype = IFLA_GRE_MAX,
+ .policy = ipgre_policy,
+ .priv_size = sizeof(struct ip_tunnel),
+ .setup = ipgre_tunnel_setup,
+ .validate = ipgre_tunnel_validate,
+ .newlink = ipgre_newlink,
+ .changelink = ipgre_changelink,
+ .get_size = ipgre_get_size,
+ .fill_info = ipgre_fill_info,
+};
+
+static struct rtnl_link_ops ipgre_tap_ops __read_mostly = {
+ .kind = "gretap",
+ .maxtype = IFLA_GRE_MAX,
+ .policy = ipgre_policy,
+ .priv_size = sizeof(struct ip_tunnel),
+ .setup = ipgre_tap_setup,
+ .validate = ipgre_tap_validate,
+ .newlink = ipgre_newlink,
+ .changelink = ipgre_changelink,
+ .get_size = ipgre_get_size,
+ .fill_info = ipgre_fill_info,
+};
+
/*
* And now the modules code and kernel interface.
*/
@@ -1238,19 +1609,39 @@ static int __init ipgre_init(void)
err = register_pernet_gen_device(&ipgre_net_id, &ipgre_net_ops);
if (err < 0)
- inet_del_protocol(&ipgre_protocol, IPPROTO_GRE);
+ goto gen_device_failed;
+ err = rtnl_link_register(&ipgre_link_ops);
+ if (err < 0)
+ goto rtnl_link_failed;
+
+ err = rtnl_link_register(&ipgre_tap_ops);
+ if (err < 0)
+ goto tap_ops_failed;
+
+out:
return err;
+
+tap_ops_failed:
+ rtnl_link_unregister(&ipgre_link_ops);
+rtnl_link_failed:
+ unregister_pernet_gen_device(ipgre_net_id, &ipgre_net_ops);
+gen_device_failed:
+ inet_del_protocol(&ipgre_protocol, IPPROTO_GRE);
+ goto out;
}
static void __exit ipgre_fini(void)
{
+ rtnl_link_unregister(&ipgre_tap_ops);
+ rtnl_link_unregister(&ipgre_link_ops);
+ unregister_pernet_gen_device(ipgre_net_id, &ipgre_net_ops);
if (inet_del_protocol(&ipgre_protocol, IPPROTO_GRE) < 0)
printk(KERN_INFO "ipgre close: can't remove protocol\n");
-
- unregister_pernet_gen_device(ipgre_net_id, &ipgre_net_ops);
}
module_init(ipgre_init);
module_exit(ipgre_fini);
MODULE_LICENSE("GPL");
+MODULE_ALIAS_RTNL_LINK("gre");
+MODULE_ALIAS_RTNL_LINK("gretap");
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.