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lwtunnel: add options setting and dumping for vxlan

Browse Source 
Based on the code framework built on the last patch, to
support setting and dumping for vxlan, we only need to
add ip_tun_parse_opts_vxlan() for .build_state and
ip_tun_fill_encap_opts_vxlan() for .fill_encap and
if (tun_flags & TUNNEL_VXLAN_OPT) for .get_encap_size.

Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Xin Long 2019-11-06 17:01:06 +08:00 committed by David S. Miller
parent 4ece477870
commit edf31cbb15
2 changed files with 74 additions and 2 deletions
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9
include/uapi/linux/lwtunnel.h
View File

@ -51,6 +51,7 @@ enum lwtunnel_ip6_t {
enum {
LWTUNNEL_IP_OPTS_UNSPEC,
LWTUNNEL_IP_OPTS_GENEVE,
LWTUNNEL_IP_OPTS_VXLAN,
__LWTUNNEL_IP_OPTS_MAX,
};
@ -66,6 +67,14 @@ enum {
#define LWTUNNEL_IP_OPT_GENEVE_MAX (__LWTUNNEL_IP_OPT_GENEVE_MAX - 1)
enum {
LWTUNNEL_IP_OPT_VXLAN_UNSPEC,
LWTUNNEL_IP_OPT_VXLAN_GBP,
__LWTUNNEL_IP_OPT_VXLAN_MAX,
};
#define LWTUNNEL_IP_OPT_VXLAN_MAX (__LWTUNNEL_IP_OPT_VXLAN_MAX - 1)
enum {
LWT_BPF_PROG_UNSPEC,
LWT_BPF_PROG_FD,

67
net/ipv4/ip_tunnel_core.c
View File

@ -35,6 +35,7 @@
#include <net/rtnetlink.h>
#include <net/dst_metadata.h>
#include <net/geneve.h>
#include <net/vxlan.h>
const struct ip_tunnel_encap_ops __rcu *
iptun_encaps[MAX_IPTUN_ENCAP_OPS] __read_mostly;
@ -224,6 +225,7 @@ static const struct nla_policy ip_tun_policy[LWTUNNEL_IP_MAX + 1] = {
static const struct nla_policy ip_opts_policy[LWTUNNEL_IP_OPTS_MAX + 1] = {
[LWTUNNEL_IP_OPTS_GENEVE] = { .type = NLA_NESTED },
[LWTUNNEL_IP_OPTS_VXLAN] = { .type = NLA_NESTED },
};
static const struct nla_policy
@ -233,6 +235,11 @@ geneve_opt_policy[LWTUNNEL_IP_OPT_GENEVE_MAX + 1] = {
[LWTUNNEL_IP_OPT_GENEVE_DATA] = { .type = NLA_BINARY, .len = 128 },
};
static const struct nla_policy
vxlan_opt_policy[LWTUNNEL_IP_OPT_VXLAN_MAX + 1] = {
[LWTUNNEL_IP_OPT_VXLAN_GBP] = { .type = NLA_U32 },
};
static int ip_tun_parse_opts_geneve(struct nlattr *attr,
struct ip_tunnel_info *info,
struct netlink_ext_ack *extack)
@ -270,6 +277,32 @@ static int ip_tun_parse_opts_geneve(struct nlattr *attr,
return sizeof(struct geneve_opt) + data_len;
}
static int ip_tun_parse_opts_vxlan(struct nlattr *attr,
struct ip_tunnel_info *info,
struct netlink_ext_ack *extack)
{
struct nlattr *tb[LWTUNNEL_IP_OPT_VXLAN_MAX + 1];
int err;
err = nla_parse_nested_deprecated(tb, LWTUNNEL_IP_OPT_VXLAN_MAX,
attr, vxlan_opt_policy, extack);
if (err)
return err;
if (!tb[LWTUNNEL_IP_OPT_VXLAN_GBP])
return -EINVAL;
if (info) {
struct vxlan_metadata *md = ip_tunnel_info_opts(info);
attr = tb[LWTUNNEL_IP_OPT_VXLAN_GBP];
md->gbp = nla_get_u32(attr);
info->key.tun_flags |= TUNNEL_VXLAN_OPT;
}
return sizeof(struct vxlan_metadata);
}
static int ip_tun_parse_opts(struct nlattr *attr, struct ip_tunnel_info *info,
struct netlink_ext_ack *extack)
{
@ -287,6 +320,9 @@ static int ip_tun_parse_opts(struct nlattr *attr, struct ip_tunnel_info *info,
if (tb[LWTUNNEL_IP_OPTS_GENEVE])
err = ip_tun_parse_opts_geneve(tb[LWTUNNEL_IP_OPTS_GENEVE],
info, extack);
else if (tb[LWTUNNEL_IP_OPTS_VXLAN])
err = ip_tun_parse_opts_vxlan(tb[LWTUNNEL_IP_OPTS_VXLAN],
info, extack);
else
err = -EINVAL;
@ -404,13 +440,34 @@ static int ip_tun_fill_encap_opts_geneve(struct sk_buff *skb,
return 0;
}
static int ip_tun_fill_encap_opts_vxlan(struct sk_buff *skb,
struct ip_tunnel_info *tun_info)
{
struct vxlan_metadata *md;
struct nlattr *nest;
nest = nla_nest_start_noflag(skb, LWTUNNEL_IP_OPTS_VXLAN);
if (!nest)
return -ENOMEM;
md = ip_tunnel_info_opts(tun_info);
if (nla_put_u32(skb, LWTUNNEL_IP_OPT_VXLAN_GBP, md->gbp)) {
nla_nest_cancel(skb, nest);
return -ENOMEM;
}
nla_nest_end(skb, nest);
return 0;
}
static int ip_tun_fill_encap_opts(struct sk_buff *skb, int type,
struct ip_tunnel_info *tun_info)
{
struct nlattr *nest;
int err = 0;
if (!(tun_info->key.tun_flags & TUNNEL_GENEVE_OPT))
if (!(tun_info->key.tun_flags &
(TUNNEL_GENEVE_OPT | TUNNEL_VXLAN_OPT)))
return 0;
nest = nla_nest_start_noflag(skb, type);
@ -419,6 +476,8 @@ static int ip_tun_fill_encap_opts(struct sk_buff *skb, int type,
if (tun_info->key.tun_flags & TUNNEL_GENEVE_OPT)
err = ip_tun_fill_encap_opts_geneve(skb, tun_info);
else if (tun_info->key.tun_flags & TUNNEL_VXLAN_OPT)
err = ip_tun_fill_encap_opts_vxlan(skb, tun_info);
if (err) {
nla_nest_cancel(skb, nest);
@ -451,7 +510,8 @@ static int ip_tun_opts_nlsize(struct ip_tunnel_info *info)
{
int opt_len;
if (!(info->key.tun_flags & TUNNEL_GENEVE_OPT))
if (!(info->key.tun_flags &
(TUNNEL_GENEVE_OPT | TUNNEL_VXLAN_OPT)))
return 0;
opt_len = nla_total_size(0); /* LWTUNNEL_IP_OPTS */
@ -463,6 +523,9 @@ static int ip_tun_opts_nlsize(struct ip_tunnel_info *info)
+ nla_total_size(1) /* OPT_GENEVE_TYPE */
+ nla_total_size(opt->length * 4);
/* OPT_GENEVE_DATA */
} else if (info->key.tun_flags & TUNNEL_VXLAN_OPT) {
opt_len += nla_total_size(0) /* LWTUNNEL_IP_OPTS_VXLAN */
+ nla_total_size(4); /* OPT_VXLAN_GBP */
}
return opt_len;