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Message-Id: <18de52560d526d1a92cc042eb74f9dc7892c50ae.1439978875.git.jbenc@redhat.com>
Date: Wed, 19 Aug 2015 12:09:54 +0200
From: Jiri Benc <jbenc@...hat.com>
To: netdev@...r.kernel.org
Cc: Thomas Graf <tgraf@...g.ch>
Subject: [PATCH v2 net-next 04/13] ip_tunnels: add IPv6 addresses to ip_tunnel_key
Add the IPv6 addresses as an union with IPv4 ones. When using IPv4, the
newly introduced padding after the IPv4 addresses needs to be zeroed out.
Signed-off-by: Jiri Benc <jbenc@...hat.com>
---
v1->v2: Fix incorrect IP_TUNNEL_KEY_IPV4_PAD_LEN calculation, thanks to
Alexei.
---
drivers/net/vxlan.c | 6 +++---
include/net/ip_tunnels.h | 24 ++++++++++++++++++++----
net/core/filter.c | 4 ++--
net/ipv4/ip_gre.c | 10 +++++-----
net/ipv4/ip_tunnel_core.c | 8 ++++----
net/openvswitch/flow_netlink.c | 18 +++++++++---------
net/openvswitch/flow_table.c | 2 +-
net/openvswitch/vport-geneve.c | 2 +-
net/openvswitch/vport.c | 2 +-
net/openvswitch/vport.h | 4 ++--
10 files changed, 48 insertions(+), 32 deletions(-)
diff --git a/drivers/net/vxlan.c b/drivers/net/vxlan.c
index ad51dac88d19..30a7abcf2c09 100644
--- a/drivers/net/vxlan.c
+++ b/drivers/net/vxlan.c
@@ -1276,8 +1276,8 @@ static int vxlan_udp_encap_recv(struct sock *sk, struct sk_buff *skb)
goto drop;
info = &tun_dst->u.tun_info;
- info->key.ipv4_src = iph->saddr;
- info->key.ipv4_dst = iph->daddr;
+ info->key.u.ipv4.src = iph->saddr;
+ info->key.u.ipv4.dst = iph->daddr;
info->key.ipv4_tos = iph->tos;
info->key.ipv4_ttl = iph->ttl;
info->key.tp_src = udp_hdr(skb)->source;
@@ -1925,7 +1925,7 @@ static void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev,
dst_port = info->key.tp_dst ? : vxlan->cfg.dst_port;
vni = be64_to_cpu(info->key.tun_id);
remote_ip.sin.sin_family = AF_INET;
- remote_ip.sin.sin_addr.s_addr = info->key.ipv4_dst;
+ remote_ip.sin.sin_addr.s_addr = info->key.u.ipv4.dst;
dst = &remote_ip;
}
diff --git a/include/net/ip_tunnels.h b/include/net/ip_tunnels.h
index cc3b39e9010b..6a51371dad00 100644
--- a/include/net/ip_tunnels.h
+++ b/include/net/ip_tunnels.h
@@ -25,10 +25,24 @@
/* Used to memset ip_tunnel padding. */
#define IP_TUNNEL_KEY_SIZE offsetofend(struct ip_tunnel_key, tp_dst)
+/* Used to memset ipv4 address padding. */
+#define IP_TUNNEL_KEY_IPV4_PAD offsetofend(struct ip_tunnel_key, u.ipv4.dst)
+#define IP_TUNNEL_KEY_IPV4_PAD_LEN \
+ (FIELD_SIZEOF(struct ip_tunnel_key, u) - \
+ FIELD_SIZEOF(struct ip_tunnel_key, u.ipv4))
+
struct ip_tunnel_key {
__be64 tun_id;
- __be32 ipv4_src;
- __be32 ipv4_dst;
+ union {
+ struct {
+ __be32 src;
+ __be32 dst;
+ } ipv4;
+ struct {
+ struct in6_addr src;
+ struct in6_addr dst;
+ } ipv6;
+ } u;
__be16 tun_flags;
u8 ipv4_tos;
u8 ipv4_ttl;
@@ -177,8 +191,10 @@ static inline void __ip_tunnel_info_init(struct ip_tunnel_info *tun_info,
const void *opts, u8 opts_len)
{
tun_info->key.tun_id = tun_id;
- tun_info->key.ipv4_src = saddr;
- tun_info->key.ipv4_dst = daddr;
+ tun_info->key.u.ipv4.src = saddr;
+ tun_info->key.u.ipv4.dst = daddr;
+ memset((unsigned char *)&tun_info->key + IP_TUNNEL_KEY_IPV4_PAD,
+ 0, IP_TUNNEL_KEY_IPV4_PAD_LEN);
tun_info->key.ipv4_tos = tos;
tun_info->key.ipv4_ttl = ttl;
tun_info->key.tun_flags = tun_flags;
diff --git a/net/core/filter.c b/net/core/filter.c
index 83f08cefeab7..379568562ffb 100644
--- a/net/core/filter.c
+++ b/net/core/filter.c
@@ -1495,7 +1495,7 @@ static u64 bpf_skb_get_tunnel_key(u64 r1, u64 r2, u64 size, u64 flags, u64 r5)
return -EINVAL;
to->tunnel_id = be64_to_cpu(info->key.tun_id);
- to->remote_ipv4 = be32_to_cpu(info->key.ipv4_src);
+ to->remote_ipv4 = be32_to_cpu(info->key.u.ipv4.src);
return 0;
}
@@ -1529,7 +1529,7 @@ static u64 bpf_skb_set_tunnel_key(u64 r1, u64 r2, u64 size, u64 flags, u64 r5)
info = &md->u.tun_info;
info->mode = IP_TUNNEL_INFO_TX;
info->key.tun_id = cpu_to_be64(from->tunnel_id);
- info->key.ipv4_dst = cpu_to_be32(from->remote_ipv4);
+ info->key.u.ipv4.dst = cpu_to_be32(from->remote_ipv4);
return 0;
}
diff --git a/net/ipv4/ip_gre.c b/net/ipv4/ip_gre.c
index fb44d693796e..b7bb7d6aa7a8 100644
--- a/net/ipv4/ip_gre.c
+++ b/net/ipv4/ip_gre.c
@@ -407,8 +407,8 @@ static int ipgre_rcv(struct sk_buff *skb, const struct tnl_ptk_info *tpi)
return PACKET_REJECT;
info = &tun_dst->u.tun_info;
- info->key.ipv4_src = iph->saddr;
- info->key.ipv4_dst = iph->daddr;
+ info->key.u.ipv4.src = iph->saddr;
+ info->key.u.ipv4.dst = iph->daddr;
info->key.ipv4_tos = iph->tos;
info->key.ipv4_ttl = iph->ttl;
@@ -527,8 +527,8 @@ static void gre_fb_xmit(struct sk_buff *skb, struct net_device *dev)
key = &tun_info->key;
memset(&fl, 0, sizeof(fl));
- fl.daddr = key->ipv4_dst;
- fl.saddr = key->ipv4_src;
+ fl.daddr = key->u.ipv4.dst;
+ fl.saddr = key->u.ipv4.src;
fl.flowi4_tos = RT_TOS(key->ipv4_tos);
fl.flowi4_mark = skb->mark;
fl.flowi4_proto = IPPROTO_GRE;
@@ -564,7 +564,7 @@ static void gre_fb_xmit(struct sk_buff *skb, struct net_device *dev)
df = key->tun_flags & TUNNEL_DONT_FRAGMENT ? htons(IP_DF) : 0;
err = iptunnel_xmit(skb->sk, rt, skb, fl.saddr,
- key->ipv4_dst, IPPROTO_GRE,
+ key->u.ipv4.dst, IPPROTO_GRE,
key->ipv4_tos, key->ipv4_ttl, df, false);
iptunnel_xmit_stats(err, &dev->stats, dev->tstats);
return;
diff --git a/net/ipv4/ip_tunnel_core.c b/net/ipv4/ip_tunnel_core.c
index 1c2389d582a6..93907d71cda6 100644
--- a/net/ipv4/ip_tunnel_core.c
+++ b/net/ipv4/ip_tunnel_core.c
@@ -227,10 +227,10 @@ static int ip_tun_build_state(struct net_device *dev, struct nlattr *attr,
tun_info->key.tun_id = nla_get_u64(tb[LWTUNNEL_IP_ID]);
if (tb[LWTUNNEL_IP_DST])
- tun_info->key.ipv4_dst = nla_get_be32(tb[LWTUNNEL_IP_DST]);
+ tun_info->key.u.ipv4.dst = nla_get_be32(tb[LWTUNNEL_IP_DST]);
if (tb[LWTUNNEL_IP_SRC])
- tun_info->key.ipv4_src = nla_get_be32(tb[LWTUNNEL_IP_SRC]);
+ tun_info->key.u.ipv4.src = nla_get_be32(tb[LWTUNNEL_IP_SRC]);
if (tb[LWTUNNEL_IP_TTL])
tun_info->key.ipv4_ttl = nla_get_u8(tb[LWTUNNEL_IP_TTL]);
@@ -262,8 +262,8 @@ static int ip_tun_fill_encap_info(struct sk_buff *skb,
struct ip_tunnel_info *tun_info = lwt_tun_info(lwtstate);
if (nla_put_u64(skb, LWTUNNEL_IP_ID, tun_info->key.tun_id) ||
- nla_put_be32(skb, LWTUNNEL_IP_DST, tun_info->key.ipv4_dst) ||
- nla_put_be32(skb, LWTUNNEL_IP_SRC, tun_info->key.ipv4_src) ||
+ nla_put_be32(skb, LWTUNNEL_IP_DST, tun_info->key.u.ipv4.dst) ||
+ nla_put_be32(skb, LWTUNNEL_IP_SRC, tun_info->key.u.ipv4.src) ||
nla_put_u8(skb, LWTUNNEL_IP_TOS, tun_info->key.ipv4_tos) ||
nla_put_u8(skb, LWTUNNEL_IP_TTL, tun_info->key.ipv4_ttl) ||
nla_put_u16(skb, LWTUNNEL_IP_SPORT, tun_info->key.tp_src) ||
diff --git a/net/openvswitch/flow_netlink.c b/net/openvswitch/flow_netlink.c
index a6eb77ab1a64..a7f866374817 100644
--- a/net/openvswitch/flow_netlink.c
+++ b/net/openvswitch/flow_netlink.c
@@ -534,11 +534,11 @@ static int ipv4_tun_from_nlattr(const struct nlattr *attr,
tun_flags |= TUNNEL_KEY;
break;
case OVS_TUNNEL_KEY_ATTR_IPV4_SRC:
- SW_FLOW_KEY_PUT(match, tun_key.ipv4_src,
+ SW_FLOW_KEY_PUT(match, tun_key.u.ipv4.src,
nla_get_in_addr(a), is_mask);
break;
case OVS_TUNNEL_KEY_ATTR_IPV4_DST:
- SW_FLOW_KEY_PUT(match, tun_key.ipv4_dst,
+ SW_FLOW_KEY_PUT(match, tun_key.u.ipv4.dst,
nla_get_in_addr(a), is_mask);
break;
case OVS_TUNNEL_KEY_ATTR_TOS:
@@ -609,7 +609,7 @@ static int ipv4_tun_from_nlattr(const struct nlattr *attr,
}
if (!is_mask) {
- if (!match->key->tun_key.ipv4_dst) {
+ if (!match->key->tun_key.u.ipv4.dst) {
OVS_NLERR(log, "IPv4 tunnel dst address is zero");
return -EINVAL;
}
@@ -647,13 +647,13 @@ static int __ipv4_tun_to_nlattr(struct sk_buff *skb,
if (output->tun_flags & TUNNEL_KEY &&
nla_put_be64(skb, OVS_TUNNEL_KEY_ATTR_ID, output->tun_id))
return -EMSGSIZE;
- if (output->ipv4_src &&
+ if (output->u.ipv4.src &&
nla_put_in_addr(skb, OVS_TUNNEL_KEY_ATTR_IPV4_SRC,
- output->ipv4_src))
+ output->u.ipv4.src))
return -EMSGSIZE;
- if (output->ipv4_dst &&
+ if (output->u.ipv4.dst &&
nla_put_in_addr(skb, OVS_TUNNEL_KEY_ATTR_IPV4_DST,
- output->ipv4_dst))
+ output->u.ipv4.dst))
return -EMSGSIZE;
if (output->ipv4_tos &&
nla_put_u8(skb, OVS_TUNNEL_KEY_ATTR_TOS, output->ipv4_tos))
@@ -1116,7 +1116,7 @@ int ovs_nla_get_match(struct sw_flow_match *match,
/* The userspace does not send tunnel attributes that
* are 0, but we should not wildcard them nonetheless.
*/
- if (match->key->tun_key.ipv4_dst)
+ if (match->key->tun_key.u.ipv4.dst)
SW_FLOW_KEY_MEMSET_FIELD(match, tun_key,
0xff, true);
@@ -1287,7 +1287,7 @@ static int __ovs_nla_put_key(const struct sw_flow_key *swkey,
if (nla_put_u32(skb, OVS_KEY_ATTR_PRIORITY, output->phy.priority))
goto nla_put_failure;
- if ((swkey->tun_key.ipv4_dst || is_mask)) {
+ if ((swkey->tun_key.u.ipv4.dst || is_mask)) {
const void *opts = NULL;
if (output->tun_key.tun_flags & TUNNEL_OPTIONS_PRESENT)
diff --git a/net/openvswitch/flow_table.c b/net/openvswitch/flow_table.c
index 3a9d1dde76ed..d22d8e948d0f 100644
--- a/net/openvswitch/flow_table.c
+++ b/net/openvswitch/flow_table.c
@@ -426,7 +426,7 @@ static u32 flow_hash(const struct sw_flow_key *key,
static int flow_key_start(const struct sw_flow_key *key)
{
- if (key->tun_key.ipv4_dst)
+ if (key->tun_key.u.ipv4.dst)
return 0;
else
return rounddown(offsetof(struct sw_flow_key, phy),
diff --git a/net/openvswitch/vport-geneve.c b/net/openvswitch/vport-geneve.c
index 1da3a14d1010..023813d05f88 100644
--- a/net/openvswitch/vport-geneve.c
+++ b/net/openvswitch/vport-geneve.c
@@ -203,7 +203,7 @@ static int geneve_tnl_send(struct vport *vport, struct sk_buff *skb)
}
err = geneve_xmit_skb(geneve_port->gs, rt, skb, fl.saddr,
- tun_key->ipv4_dst, tun_key->ipv4_tos,
+ tun_key->u.ipv4.dst, tun_key->ipv4_tos,
tun_key->ipv4_ttl, df, sport, dport,
tun_key->tun_flags, vni, opts_len, opts,
!!(tun_key->tun_flags & TUNNEL_CSUM), false);
diff --git a/net/openvswitch/vport.c b/net/openvswitch/vport.c
index d14f59403c5e..a06adc72a58d 100644
--- a/net/openvswitch/vport.c
+++ b/net/openvswitch/vport.c
@@ -603,7 +603,7 @@ int ovs_tunnel_get_egress_info(struct ip_tunnel_info *egress_tun_info,
* saddr, tp_src and tp_dst
*/
__ip_tunnel_info_init(egress_tun_info,
- fl.saddr, tun_key->ipv4_dst,
+ fl.saddr, tun_key->u.ipv4.dst,
tun_key->ipv4_tos,
tun_key->ipv4_ttl,
tp_src, tp_dst,
diff --git a/net/openvswitch/vport.h b/net/openvswitch/vport.h
index 1a689c28b5a6..43d8f5a835cb 100644
--- a/net/openvswitch/vport.h
+++ b/net/openvswitch/vport.h
@@ -254,8 +254,8 @@ static inline struct rtable *ovs_tunnel_route_lookup(struct net *net,
struct rtable *rt;
memset(fl, 0, sizeof(*fl));
- fl->daddr = key->ipv4_dst;
- fl->saddr = key->ipv4_src;
+ fl->daddr = key->u.ipv4.dst;
+ fl->saddr = key->u.ipv4.src;
fl->flowi4_tos = RT_TOS(key->ipv4_tos);
fl->flowi4_mark = mark;
fl->flowi4_proto = protocol;
--
1.8.3.1
--
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