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authorCraig Gallek <kraig@google.com>2017-04-19 19:30:53 +0300
committerDavid S. Miller <davem@davemloft.net>2017-04-21 20:21:30 +0300
commit0a473b82cb23e7a35c4be6e9765c8487a65e8f55 (patch)
tree5568a1f040800160b0d9a9722d39f59403273199 /net/ipv6
parent8e6c1812e632ae3b54a1a9da759cad762f633e11 (diff)
downloadlinux-0a473b82cb23e7a35c4be6e9765c8487a65e8f55.tar.xz
ip6_tunnel: Allow policy-based routing through tunnels
This feature allows the administrator to set an fwmark for packets traversing a tunnel. This allows the use of independent routing tables for tunneled packets without the use of iptables. Signed-off-by: Craig Gallek <kraig@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6')
-rw-r--r--net/ipv6/ip6_gre.c14
-rw-r--r--net/ipv6/ip6_tunnel.c15
-rw-r--r--net/ipv6/ip6_vti.c10
3 files changed, 36 insertions, 3 deletions
diff --git a/net/ipv6/ip6_gre.c b/net/ipv6/ip6_gre.c
index 6fcb7cb49bb2..8d128ba79b66 100644
--- a/net/ipv6/ip6_gre.c
+++ b/net/ipv6/ip6_gre.c
@@ -544,6 +544,8 @@ static inline int ip6gre_xmit_ipv4(struct sk_buff *skb, struct net_device *dev)
& IPV6_TCLASS_MASK;
if (t->parms.flags & IP6_TNL_F_USE_ORIG_FWMARK)
fl6.flowi6_mark = skb->mark;
+ else
+ fl6.flowi6_mark = t->parms.fwmark;
fl6.flowi6_uid = sock_net_uid(dev_net(dev), NULL);
@@ -603,6 +605,8 @@ static inline int ip6gre_xmit_ipv6(struct sk_buff *skb, struct net_device *dev)
fl6.flowlabel |= ip6_flowlabel(ipv6h);
if (t->parms.flags & IP6_TNL_F_USE_ORIG_FWMARK)
fl6.flowi6_mark = skb->mark;
+ else
+ fl6.flowi6_mark = t->parms.fwmark;
fl6.flowi6_uid = sock_net_uid(dev_net(dev), NULL);
@@ -780,6 +784,7 @@ static int ip6gre_tnl_change(struct ip6_tnl *t,
t->parms.o_key = p->o_key;
t->parms.i_flags = p->i_flags;
t->parms.o_flags = p->o_flags;
+ t->parms.fwmark = p->fwmark;
dst_cache_reset(&t->dst_cache);
ip6gre_tnl_link_config(t, set_mtu);
return 0;
@@ -1249,6 +1254,9 @@ static void ip6gre_netlink_parms(struct nlattr *data[],
if (data[IFLA_GRE_FLAGS])
parms->flags = nla_get_u32(data[IFLA_GRE_FLAGS]);
+
+ if (data[IFLA_GRE_FWMARK])
+ parms->fwmark = nla_get_u32(data[IFLA_GRE_FWMARK]);
}
static int ip6gre_tap_init(struct net_device *dev)
@@ -1470,6 +1478,8 @@ static size_t ip6gre_get_size(const struct net_device *dev)
nla_total_size(2) +
/* IFLA_GRE_ENCAP_DPORT */
nla_total_size(2) +
+ /* IFLA_GRE_FWMARK */
+ nla_total_size(4) +
0;
}
@@ -1490,7 +1500,8 @@ static int ip6gre_fill_info(struct sk_buff *skb, const struct net_device *dev)
nla_put_u8(skb, IFLA_GRE_TTL, p->hop_limit) ||
nla_put_u8(skb, IFLA_GRE_ENCAP_LIMIT, p->encap_limit) ||
nla_put_be32(skb, IFLA_GRE_FLOWINFO, p->flowinfo) ||
- nla_put_u32(skb, IFLA_GRE_FLAGS, p->flags))
+ nla_put_u32(skb, IFLA_GRE_FLAGS, p->flags) ||
+ nla_put_u32(skb, IFLA_GRE_FWMARK, p->fwmark))
goto nla_put_failure;
if (nla_put_u16(skb, IFLA_GRE_ENCAP_TYPE,
@@ -1525,6 +1536,7 @@ static const struct nla_policy ip6gre_policy[IFLA_GRE_MAX + 1] = {
[IFLA_GRE_ENCAP_FLAGS] = { .type = NLA_U16 },
[IFLA_GRE_ENCAP_SPORT] = { .type = NLA_U16 },
[IFLA_GRE_ENCAP_DPORT] = { .type = NLA_U16 },
+ [IFLA_GRE_FWMARK] = { .type = NLA_U32 },
};
static struct rtnl_link_ops ip6gre_link_ops __read_mostly = {
diff --git a/net/ipv6/ip6_tunnel.c b/net/ipv6/ip6_tunnel.c
index 75fac933c209..ad15d38b41e8 100644
--- a/net/ipv6/ip6_tunnel.c
+++ b/net/ipv6/ip6_tunnel.c
@@ -1256,6 +1256,8 @@ ip4ip6_tnl_xmit(struct sk_buff *skb, struct net_device *dev)
& IPV6_TCLASS_MASK;
if (t->parms.flags & IP6_TNL_F_USE_ORIG_FWMARK)
fl6.flowi6_mark = skb->mark;
+ else
+ fl6.flowi6_mark = t->parms.fwmark;
}
fl6.flowi6_uid = sock_net_uid(dev_net(dev), NULL);
@@ -1338,6 +1340,8 @@ ip6ip6_tnl_xmit(struct sk_buff *skb, struct net_device *dev)
fl6.flowlabel |= ip6_flowlabel(ipv6h);
if (t->parms.flags & IP6_TNL_F_USE_ORIG_FWMARK)
fl6.flowi6_mark = skb->mark;
+ else
+ fl6.flowi6_mark = t->parms.fwmark;
}
fl6.flowi6_uid = sock_net_uid(dev_net(dev), NULL);
@@ -1467,6 +1471,7 @@ ip6_tnl_change(struct ip6_tnl *t, const struct __ip6_tnl_parm *p)
t->parms.flowinfo = p->flowinfo;
t->parms.link = p->link;
t->parms.proto = p->proto;
+ t->parms.fwmark = p->fwmark;
dst_cache_reset(&t->dst_cache);
ip6_tnl_link_config(t);
return 0;
@@ -1918,6 +1923,9 @@ static void ip6_tnl_netlink_parms(struct nlattr *data[],
if (data[IFLA_IPTUN_COLLECT_METADATA])
parms->collect_md = true;
+
+ if (data[IFLA_IPTUN_FWMARK])
+ parms->fwmark = nla_get_u32(data[IFLA_IPTUN_FWMARK]);
}
static bool ip6_tnl_netlink_encap_parms(struct nlattr *data[],
@@ -2054,6 +2062,8 @@ static size_t ip6_tnl_get_size(const struct net_device *dev)
nla_total_size(2) +
/* IFLA_IPTUN_COLLECT_METADATA */
nla_total_size(0) +
+ /* IFLA_IPTUN_FWMARK */
+ nla_total_size(4) +
0;
}
@@ -2069,7 +2079,8 @@ static int ip6_tnl_fill_info(struct sk_buff *skb, const struct net_device *dev)
nla_put_u8(skb, IFLA_IPTUN_ENCAP_LIMIT, parm->encap_limit) ||
nla_put_be32(skb, IFLA_IPTUN_FLOWINFO, parm->flowinfo) ||
nla_put_u32(skb, IFLA_IPTUN_FLAGS, parm->flags) ||
- nla_put_u8(skb, IFLA_IPTUN_PROTO, parm->proto))
+ nla_put_u8(skb, IFLA_IPTUN_PROTO, parm->proto) ||
+ nla_put_u32(skb, IFLA_IPTUN_FWMARK, parm->fwmark))
goto nla_put_failure;
if (nla_put_u16(skb, IFLA_IPTUN_ENCAP_TYPE, tunnel->encap.type) ||
@@ -2081,6 +2092,7 @@ static int ip6_tnl_fill_info(struct sk_buff *skb, const struct net_device *dev)
if (parm->collect_md)
if (nla_put_flag(skb, IFLA_IPTUN_COLLECT_METADATA))
goto nla_put_failure;
+
return 0;
nla_put_failure:
@@ -2109,6 +2121,7 @@ static const struct nla_policy ip6_tnl_policy[IFLA_IPTUN_MAX + 1] = {
[IFLA_IPTUN_ENCAP_SPORT] = { .type = NLA_U16 },
[IFLA_IPTUN_ENCAP_DPORT] = { .type = NLA_U16 },
[IFLA_IPTUN_COLLECT_METADATA] = { .type = NLA_FLAG },
+ [IFLA_IPTUN_FWMARK] = { .type = NLA_U32 },
};
static struct rtnl_link_ops ip6_link_ops __read_mostly = {
diff --git a/net/ipv6/ip6_vti.c b/net/ipv6/ip6_vti.c
index 3d8a3b63b4fd..d67ef56454b2 100644
--- a/net/ipv6/ip6_vti.c
+++ b/net/ipv6/ip6_vti.c
@@ -657,6 +657,7 @@ vti6_tnl_change(struct ip6_tnl *t, const struct __ip6_tnl_parm *p)
t->parms.i_key = p->i_key;
t->parms.o_key = p->o_key;
t->parms.proto = p->proto;
+ t->parms.fwmark = p->fwmark;
dst_cache_reset(&t->dst_cache);
vti6_link_config(t);
return 0;
@@ -933,6 +934,9 @@ static void vti6_netlink_parms(struct nlattr *data[],
if (data[IFLA_VTI_OKEY])
parms->o_key = nla_get_be32(data[IFLA_VTI_OKEY]);
+
+ if (data[IFLA_VTI_FWMARK])
+ parms->fwmark = nla_get_u32(data[IFLA_VTI_FWMARK]);
}
static int vti6_newlink(struct net *src_net, struct net_device *dev,
@@ -998,6 +1002,8 @@ static size_t vti6_get_size(const struct net_device *dev)
nla_total_size(4) +
/* IFLA_VTI_OKEY */
nla_total_size(4) +
+ /* IFLA_VTI_FWMARK */
+ nla_total_size(4) +
0;
}
@@ -1010,7 +1016,8 @@ static int vti6_fill_info(struct sk_buff *skb, const struct net_device *dev)
nla_put_in6_addr(skb, IFLA_VTI_LOCAL, &parm->laddr) ||
nla_put_in6_addr(skb, IFLA_VTI_REMOTE, &parm->raddr) ||
nla_put_be32(skb, IFLA_VTI_IKEY, parm->i_key) ||
- nla_put_be32(skb, IFLA_VTI_OKEY, parm->o_key))
+ nla_put_be32(skb, IFLA_VTI_OKEY, parm->o_key) ||
+ nla_put_u32(skb, IFLA_VTI_FWMARK, parm->fwmark))
goto nla_put_failure;
return 0;
@@ -1024,6 +1031,7 @@ static const struct nla_policy vti6_policy[IFLA_VTI_MAX + 1] = {
[IFLA_VTI_REMOTE] = { .len = sizeof(struct in6_addr) },
[IFLA_VTI_IKEY] = { .type = NLA_U32 },
[IFLA_VTI_OKEY] = { .type = NLA_U32 },
+ [IFLA_VTI_FWMARK] = { .type = NLA_U32 },
};
static struct rtnl_link_ops vti6_link_ops __read_mostly = {