[PATCH net-next 0/5] lwtunnel: add ip and ip6 options setting and dumping

[PATCH net-next 0/5] lwtunnel: add ip and ip6 options setting and dumping

[Xin Long]

With this patchset, users can configure options by ip route encap
for geneve, vxlan and ersapn lwtunnel, like:

  # ip r a 1.1.1.0/24 encap ip id 1 geneve class 0 type 0 \
    data "1212121234567890" dst 10.1.0.2 dev geneve1

  # ip r a 1.1.1.0/24 encap ip id 1 vxlan gbp 456 \
    dst 10.1.0.2 dev erspan1

  # ip r a 1.1.1.0/24 encap ip id 1 erspan ver 1 idx 123 \
    dst 10.1.0.2 dev erspan1

iproute side patch is attached on the reply of this mail.

Thank Simon for good advice.

Xin Long (5):
  lwtunnel: add options process for arp request
  lwtunnel: add options process for cmp_encap
  lwtunnel: add options setting and dumping for geneve
  lwtunnel: add options setting and dumping for vxlan
  lwtunnel: add options setting and dumping for erspan

 include/uapi/linux/lwtunnel.h |  41 +++++
 net/ipv4/ip_tunnel_core.c     | 382 +++++++++++++++++++++++++++++++++++++++---
 2 files changed, 402 insertions(+), 21 deletions(-)

-- 
2.1.0

[PATCH net-next 1/5] lwtunnel: add options process for arp request

[Xin Long]

Without options copied to the dst tun_info in iptunnel_metadata_reply()
called by arp_process for handling arp_request, the generated arp_reply
packet may be dropped or sent out with wrong options for some tunnels
like erspan and vxlan, and the traffic will break.

Fixes: 63d008a4e9ee ("ipv4: send arp replies to the correct tunnel")
Signed-off-by: Xin Long <lucien.xin@gmail.com>
---
 net/ipv4/ip_tunnel_core.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/net/ipv4/ip_tunnel_core.c b/net/ipv4/ip_tunnel_core.c
index 1452a97..10f0848 100644
--- a/net/ipv4/ip_tunnel_core.c
+++ b/net/ipv4/ip_tunnel_core.c
@@ -126,15 +126,14 @@ struct metadata_dst *iptunnel_metadata_reply(struct metadata_dst *md,
 
 	if (!md || md->type != METADATA_IP_TUNNEL ||
 	    md->u.tun_info.mode & IP_TUNNEL_INFO_TX)
-
 		return NULL;
 
-	res = metadata_dst_alloc(0, METADATA_IP_TUNNEL, flags);
+	src = &md->u.tun_info;
+	res = metadata_dst_alloc(src->options_len, METADATA_IP_TUNNEL, flags);
 	if (!res)
 		return NULL;
 
 	dst = &res->u.tun_info;
-	src = &md->u.tun_info;
 	dst->key.tun_id = src->key.tun_id;
 	if (src->mode & IP_TUNNEL_INFO_IPV6)
 		memcpy(&dst->key.u.ipv6.dst, &src->key.u.ipv6.src,
@@ -143,6 +142,8 @@ struct metadata_dst *iptunnel_metadata_reply(struct metadata_dst *md,
 		dst->key.u.ipv4.dst = src->key.u.ipv4.src;
 	dst->key.tun_flags = src->key.tun_flags;
 	dst->mode = src->mode | IP_TUNNEL_INFO_TX;
+	ip_tunnel_info_opts_set(dst, ip_tunnel_info_opts(src),
+				src->options_len, 0);
 
 	return res;
 }
-- 
2.1.0

[PATCH net-next 2/5] lwtunnel: add options process for cmp_encap

[Xin Long]

When comparing two tun_info, dst_cache member should have been skipped,
as dst_cache is a per cpu pointer and they are always different values
even in two tun_info with the same keys.

So this patch is to skip dst_cache member and compare the key, mode and
options_len only. For the future opts setting support, also to compare
options.

Fixes: 2d79849903e0 ("lwtunnel: ip tunnel: fix multiple routes with different encap")
Signed-off-by: Xin Long <lucien.xin@gmail.com>
---
 net/ipv4/ip_tunnel_core.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/net/ipv4/ip_tunnel_core.c b/net/ipv4/ip_tunnel_core.c
index 10f0848..c0b5bad 100644
--- a/net/ipv4/ip_tunnel_core.c
+++ b/net/ipv4/ip_tunnel_core.c
@@ -315,8 +315,14 @@ static int ip_tun_encap_nlsize(struct lwtunnel_state *lwtstate)
 
 static int ip_tun_cmp_encap(struct lwtunnel_state *a, struct lwtunnel_state *b)
 {
-	return memcmp(lwt_tun_info(a), lwt_tun_info(b),
-		      sizeof(struct ip_tunnel_info));
+	struct ip_tunnel_info *info_a = lwt_tun_info(a);
+	struct ip_tunnel_info *info_b = lwt_tun_info(b);
+
+	return memcmp(info_a, info_b, sizeof(info_a->key)) ||
+	       info_a->mode != info_b->mode ||
+	       info_a->options_len != info_b->options_len ||
+	       memcmp(ip_tunnel_info_opts(info_a),
+		      ip_tunnel_info_opts(info_b), info_a->options_len);
 }
 
 static const struct lwtunnel_encap_ops ip_tun_lwt_ops = {
-- 
2.1.0

[PATCH net-next 3/5] lwtunnel: add options setting and dumping for geneve

[Xin Long]

To add options setting and dumping, .build_state(), .fill_encap() and
.get_encap_size() in ip_tun_lwt_ops needs to be extended:

ip_tun_build_state():
  ip_tun_parse_opts():
    ip_tun_parse_opts_geneve()

ip_tun_fill_encap_info():
  ip_tun_fill_encap_opts():
    ip_tun_fill_encap_opts_geneve()

ip_tun_encap_nlsize()
   ip_tun_opts_nlsize():
     if (tun_flags & TUNNEL_GENEVE_OPT)

ip_tun_parse_opts(), ip_tun_fill_encap_opts() and ip_tun_opts_nlsize()
processes LWTUNNEL_IP_OPTS.

ip_tun_parse_opts_geneve(), ip_tun_fill_encap_opts_geneve() and
if (tun_flags & TUNNEL_GENEVE_OPT) processes LWTUNNEL_IP_OPTS_GENEVE.

Signed-off-by: Xin Long <lucien.xin@gmail.com>
---
 include/uapi/linux/lwtunnel.h |  20 ++++
 net/ipv4/ip_tunnel_core.c     | 212 ++++++++++++++++++++++++++++++++++++++----
 2 files changed, 216 insertions(+), 16 deletions(-)

diff --git a/include/uapi/linux/lwtunnel.h b/include/uapi/linux/lwtunnel.h
index de696ca..b595ab2 100644
--- a/include/uapi/linux/lwtunnel.h
+++ b/include/uapi/linux/lwtunnel.h
@@ -27,6 +27,7 @@ enum lwtunnel_ip_t {
 	LWTUNNEL_IP_TOS,
 	LWTUNNEL_IP_FLAGS,
 	LWTUNNEL_IP_PAD,
+	LWTUNNEL_IP_OPTS,
 	__LWTUNNEL_IP_MAX,
 };
 
@@ -41,12 +42,31 @@ enum lwtunnel_ip6_t {
 	LWTUNNEL_IP6_TC,
 	LWTUNNEL_IP6_FLAGS,
 	LWTUNNEL_IP6_PAD,
+	LWTUNNEL_IP6_OPTS,
 	__LWTUNNEL_IP6_MAX,
 };
 
 #define LWTUNNEL_IP6_MAX (__LWTUNNEL_IP6_MAX - 1)
 
 enum {
+	LWTUNNEL_IP_OPTS_UNSPEC,
+	LWTUNNEL_IP_OPTS_GENEVE,
+	__LWTUNNEL_IP_OPTS_MAX,
+};
+
+#define LWTUNNEL_IP_OPTS_MAX (__LWTUNNEL_IP_OPTS_MAX - 1)
+
+enum {
+	LWTUNNEL_IP_OPT_GENEVE_UNSPEC,
+	LWTUNNEL_IP_OPT_GENEVE_CLASS,
+	LWTUNNEL_IP_OPT_GENEVE_TYPE,
+	LWTUNNEL_IP_OPT_GENEVE_DATA,
+	__LWTUNNEL_IP_OPT_GENEVE_MAX,
+};
+
+#define LWTUNNEL_IP_OPT_GENEVE_MAX (__LWTUNNEL_IP_OPT_GENEVE_MAX - 1)
+
+enum {
 	LWT_BPF_PROG_UNSPEC,
 	LWT_BPF_PROG_FD,
 	LWT_BPF_PROG_NAME,
diff --git a/net/ipv4/ip_tunnel_core.c b/net/ipv4/ip_tunnel_core.c
index c0b5bad..1ec9d94 100644
--- a/net/ipv4/ip_tunnel_core.c
+++ b/net/ipv4/ip_tunnel_core.c
@@ -34,6 +34,7 @@
 #include <net/netns/generic.h>
 #include <net/rtnetlink.h>
 #include <net/dst_metadata.h>
+#include <net/geneve.h>
 
 const struct ip_tunnel_encap_ops __rcu *
 		iptun_encaps[MAX_IPTUN_ENCAP_OPS] __read_mostly;
@@ -218,24 +219,112 @@ static const struct nla_policy ip_tun_policy[LWTUNNEL_IP_MAX + 1] = {
 	[LWTUNNEL_IP_TTL]	= { .type = NLA_U8 },
 	[LWTUNNEL_IP_TOS]	= { .type = NLA_U8 },
 	[LWTUNNEL_IP_FLAGS]	= { .type = NLA_U16 },
+	[LWTUNNEL_IP_OPTS]	= { .type = NLA_NESTED },
 };
 
+static const struct nla_policy ip_opts_policy[LWTUNNEL_IP_OPTS_MAX + 1] = {
+	[LWTUNNEL_IP_OPTS_GENEVE]	= { .type = NLA_NESTED },
+};
+
+static const struct nla_policy
+geneve_opt_policy[LWTUNNEL_IP_OPT_GENEVE_MAX + 1] = {
+	[LWTUNNEL_IP_OPT_GENEVE_CLASS]	= { .type = NLA_U16 },
+	[LWTUNNEL_IP_OPT_GENEVE_TYPE]	= { .type = NLA_U8 },
+	[LWTUNNEL_IP_OPT_GENEVE_DATA]	= { .type = NLA_BINARY, .len = 128 },
+};
+
+static int ip_tun_parse_opts_geneve(struct nlattr *attr,
+				    struct ip_tunnel_info *info,
+				    struct netlink_ext_ack *extack)
+{
+	struct nlattr *tb[LWTUNNEL_IP_OPT_GENEVE_MAX + 1];
+	int data_len, err;
+
+	err = nla_parse_nested_deprecated(tb, LWTUNNEL_IP_OPT_GENEVE_MAX,
+					  attr, geneve_opt_policy, extack);
+	if (err)
+		return err;
+
+	if (!tb[LWTUNNEL_IP_OPT_GENEVE_CLASS] ||
+	    !tb[LWTUNNEL_IP_OPT_GENEVE_TYPE] ||
+	    !tb[LWTUNNEL_IP_OPT_GENEVE_DATA])
+		return -EINVAL;
+
+	attr = tb[LWTUNNEL_IP_OPT_GENEVE_DATA];
+	data_len = nla_len(attr);
+	if (data_len % 4)
+		return -EINVAL;
+
+	if (info) {
+		struct geneve_opt *opt = ip_tunnel_info_opts(info);
+
+		memcpy(opt->opt_data, nla_data(attr), data_len);
+		opt->length = data_len / 4;
+		attr = tb[LWTUNNEL_IP_OPT_GENEVE_CLASS];
+		opt->opt_class = nla_get_be16(attr);
+		attr = tb[LWTUNNEL_IP_OPT_GENEVE_TYPE];
+		opt->type = nla_get_u8(attr);
+		info->key.tun_flags |= TUNNEL_GENEVE_OPT;
+	}
+
+	return sizeof(struct geneve_opt) + data_len;
+}
+
+static int ip_tun_parse_opts(struct nlattr *attr, struct ip_tunnel_info *info,
+			     struct netlink_ext_ack *extack)
+{
+	struct nlattr *tb[LWTUNNEL_IP_OPTS_MAX + 1];
+	int err;
+
+	if (!attr)
+		return 0;
+
+	err = nla_parse_nested_deprecated(tb, LWTUNNEL_IP_OPTS_MAX, attr,
+					  ip_opts_policy, extack);
+	if (err)
+		return err;
+
+	if (tb[LWTUNNEL_IP_OPTS_GENEVE])
+		err = ip_tun_parse_opts_geneve(tb[LWTUNNEL_IP_OPTS_GENEVE],
+					       info, extack);
+	else
+		err = -EINVAL;
+
+	return err;
+}
+
+static int ip_tun_get_optlen(struct nlattr *attr,
+			     struct netlink_ext_ack *extack)
+{
+	return ip_tun_parse_opts(attr, NULL, extack);
+}
+
+static int ip_tun_set_opts(struct nlattr *attr, struct ip_tunnel_info *info,
+			   struct netlink_ext_ack *extack)
+{
+	return ip_tun_parse_opts(attr, info, extack);
+}
+
 static int ip_tun_build_state(struct nlattr *attr,
 			      unsigned int family, const void *cfg,
 			      struct lwtunnel_state **ts,
 			      struct netlink_ext_ack *extack)
 {
-	struct ip_tunnel_info *tun_info;
-	struct lwtunnel_state *new_state;
 	struct nlattr *tb[LWTUNNEL_IP_MAX + 1];
-	int err;
+	struct lwtunnel_state *new_state;
+	struct ip_tunnel_info *tun_info;
+	int err, opt_len;
 
 	err = nla_parse_nested_deprecated(tb, LWTUNNEL_IP_MAX, attr,
 					  ip_tun_policy, extack);
 	if (err < 0)
 		return err;
 
-	new_state = lwtunnel_state_alloc(sizeof(*tun_info));
+	opt_len = ip_tun_get_optlen(tb[LWTUNNEL_IP_OPTS], extack);
+	if (opt_len < 0)
+		return opt_len;
+
+	new_state = lwtunnel_state_alloc(sizeof(*tun_info) + opt_len);
 	if (!new_state)
 		return -ENOMEM;
 
@@ -243,6 +332,12 @@ static int ip_tun_build_state(struct nlattr *attr,
 
 	tun_info = lwt_tun_info(new_state);
 
+	err = ip_tun_set_opts(tb[LWTUNNEL_IP_OPTS], tun_info, extack);
+	if (err < 0) {
+		lwtstate_free(new_state);
+		return err;
+	}
+
 #ifdef CONFIG_DST_CACHE
 	err = dst_cache_init(&tun_info->dst_cache, GFP_KERNEL);
 	if (err) {
@@ -267,10 +362,10 @@ static int ip_tun_build_state(struct nlattr *attr,
 		tun_info->key.tos = nla_get_u8(tb[LWTUNNEL_IP_TOS]);
 
 	if (tb[LWTUNNEL_IP_FLAGS])
-		tun_info->key.tun_flags = nla_get_be16(tb[LWTUNNEL_IP_FLAGS]);
+		tun_info->key.tun_flags |= nla_get_be16(tb[LWTUNNEL_IP_FLAGS]);
 
 	tun_info->mode = IP_TUNNEL_INFO_TX;
-	tun_info->options_len = 0;
+	tun_info->options_len = opt_len;
 
 	*ts = new_state;
 
@@ -286,6 +381,54 @@ static void ip_tun_destroy_state(struct lwtunnel_state *lwtstate)
 #endif
 }
 
+static int ip_tun_fill_encap_opts_geneve(struct sk_buff *skb,
+					 struct ip_tunnel_info *tun_info)
+{
+	struct geneve_opt *opt;
+	struct nlattr *nest;
+
+	nest = nla_nest_start_noflag(skb, LWTUNNEL_IP_OPTS_GENEVE);
+	if (!nest)
+		return -ENOMEM;
+
+	opt = ip_tunnel_info_opts(tun_info);
+	if (nla_put_be16(skb, LWTUNNEL_IP_OPT_GENEVE_CLASS, opt->opt_class) ||
+	    nla_put_u8(skb, LWTUNNEL_IP_OPT_GENEVE_TYPE, opt->type) ||
+	    nla_put(skb, LWTUNNEL_IP_OPT_GENEVE_DATA, opt->length * 4,
+		    opt->opt_data)) {
+		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))
+		return 0;
+
+	nest = nla_nest_start_noflag(skb, type);
+	if (!nest)
+		return -ENOMEM;
+
+	if (tun_info->key.tun_flags & TUNNEL_GENEVE_OPT)
+		err = ip_tun_fill_encap_opts_geneve(skb, tun_info);
+
+	if (err) {
+		nla_nest_cancel(skb, nest);
+		return err;
+	}
+
+	nla_nest_end(skb, nest);
+	return 0;
+}
+
 static int ip_tun_fill_encap_info(struct sk_buff *skb,
 				  struct lwtunnel_state *lwtstate)
 {
@@ -297,12 +440,34 @@ static int ip_tun_fill_encap_info(struct sk_buff *skb,
 	    nla_put_in_addr(skb, LWTUNNEL_IP_SRC, tun_info->key.u.ipv4.src) ||
 	    nla_put_u8(skb, LWTUNNEL_IP_TOS, tun_info->key.tos) ||
 	    nla_put_u8(skb, LWTUNNEL_IP_TTL, tun_info->key.ttl) ||
-	    nla_put_be16(skb, LWTUNNEL_IP_FLAGS, tun_info->key.tun_flags))
+	    nla_put_be16(skb, LWTUNNEL_IP_FLAGS, tun_info->key.tun_flags) ||
+	    ip_tun_fill_encap_opts(skb, LWTUNNEL_IP_OPTS, tun_info))
 		return -ENOMEM;
 
 	return 0;
 }
 
+static int ip_tun_opts_nlsize(struct ip_tunnel_info *info)
+{
+	int opt_len;
+
+	if (!(info->key.tun_flags & TUNNEL_GENEVE_OPT))
+		return 0;
+
+	opt_len = nla_total_size(0);		/* LWTUNNEL_IP_OPTS */
+	if (info->key.tun_flags & TUNNEL_GENEVE_OPT) {
+		struct geneve_opt *opt = ip_tunnel_info_opts(info);
+
+		opt_len += nla_total_size(0)	/* LWTUNNEL_IP_OPTS_GENEVE */
+			   + nla_total_size(2)	/* OPT_GENEVE_CLASS */
+			   + nla_total_size(1)	/* OPT_GENEVE_TYPE */
+			   + nla_total_size(opt->length * 4);
+						/* OPT_GENEVE_DATA */
+	}
+
+	return opt_len;
+}
+
 static int ip_tun_encap_nlsize(struct lwtunnel_state *lwtstate)
 {
 	return nla_total_size_64bit(8)	/* LWTUNNEL_IP_ID */
@@ -310,7 +475,9 @@ static int ip_tun_encap_nlsize(struct lwtunnel_state *lwtstate)
 		+ nla_total_size(4)	/* LWTUNNEL_IP_SRC */
 		+ nla_total_size(1)	/* LWTUNNEL_IP_TOS */
 		+ nla_total_size(1)	/* LWTUNNEL_IP_TTL */
-		+ nla_total_size(2);	/* LWTUNNEL_IP_FLAGS */
+		+ nla_total_size(2)	/* LWTUNNEL_IP_FLAGS */
+		+ ip_tun_opts_nlsize(lwt_tun_info(lwtstate));
+					/* LWTUNNEL_IP_OPTS */
 }
 
 static int ip_tun_cmp_encap(struct lwtunnel_state *a, struct lwtunnel_state *b)
@@ -348,17 +515,21 @@ static int ip6_tun_build_state(struct nlattr *attr,
 			       struct lwtunnel_state **ts,
 			       struct netlink_ext_ack *extack)
 {
-	struct ip_tunnel_info *tun_info;
-	struct lwtunnel_state *new_state;
 	struct nlattr *tb[LWTUNNEL_IP6_MAX + 1];
-	int err;
+	struct lwtunnel_state *new_state;
+	struct ip_tunnel_info *tun_info;
+	int err, opt_len;
 
 	err = nla_parse_nested_deprecated(tb, LWTUNNEL_IP6_MAX, attr,
 					  ip6_tun_policy, extack);
 	if (err < 0)
 		return err;
 
-	new_state = lwtunnel_state_alloc(sizeof(*tun_info));
+	opt_len = ip_tun_get_optlen(tb[LWTUNNEL_IP6_OPTS], extack);
+	if (opt_len < 0)
+		return opt_len;
+
+	new_state = lwtunnel_state_alloc(sizeof(*tun_info) + opt_len);
 	if (!new_state)
 		return -ENOMEM;
 
@@ -366,6 +537,12 @@ static int ip6_tun_build_state(struct nlattr *attr,
 
 	tun_info = lwt_tun_info(new_state);
 
+	err = ip_tun_set_opts(tb[LWTUNNEL_IP6_OPTS], tun_info, extack);
+	if (err < 0) {
+		lwtstate_free(new_state);
+		return err;
+	}
+
 	if (tb[LWTUNNEL_IP6_ID])
 		tun_info->key.tun_id = nla_get_be64(tb[LWTUNNEL_IP6_ID]);
 
@@ -382,10 +559,10 @@ static int ip6_tun_build_state(struct nlattr *attr,
 		tun_info->key.tos = nla_get_u8(tb[LWTUNNEL_IP6_TC]);
 
 	if (tb[LWTUNNEL_IP6_FLAGS])
-		tun_info->key.tun_flags = nla_get_be16(tb[LWTUNNEL_IP6_FLAGS]);
+		tun_info->key.tun_flags |= nla_get_be16(tb[LWTUNNEL_IP6_FLAGS]);
 
 	tun_info->mode = IP_TUNNEL_INFO_TX | IP_TUNNEL_INFO_IPV6;
-	tun_info->options_len = 0;
+	tun_info->options_len = opt_len;
 
 	*ts = new_state;
 
@@ -403,7 +580,8 @@ static int ip6_tun_fill_encap_info(struct sk_buff *skb,
 	    nla_put_in6_addr(skb, LWTUNNEL_IP6_SRC, &tun_info->key.u.ipv6.src) ||
 	    nla_put_u8(skb, LWTUNNEL_IP6_TC, tun_info->key.tos) ||
 	    nla_put_u8(skb, LWTUNNEL_IP6_HOPLIMIT, tun_info->key.ttl) ||
-	    nla_put_be16(skb, LWTUNNEL_IP6_FLAGS, tun_info->key.tun_flags))
+	    nla_put_be16(skb, LWTUNNEL_IP6_FLAGS, tun_info->key.tun_flags) ||
+	    ip_tun_fill_encap_opts(skb, LWTUNNEL_IP6_OPTS, tun_info))
 		return -ENOMEM;
 
 	return 0;
@@ -416,7 +594,9 @@ static int ip6_tun_encap_nlsize(struct lwtunnel_state *lwtstate)
 		+ nla_total_size(16)	/* LWTUNNEL_IP6_SRC */
 		+ nla_total_size(1)	/* LWTUNNEL_IP6_HOPLIMIT */
 		+ nla_total_size(1)	/* LWTUNNEL_IP6_TC */
-		+ nla_total_size(2);	/* LWTUNNEL_IP6_FLAGS */
+		+ nla_total_size(2)	/* LWTUNNEL_IP6_FLAGS */
+		+ ip_tun_opts_nlsize(lwt_tun_info(lwtstate));
+					/* LWTUNNEL_IP6_OPTS */
 }
 
 static const struct lwtunnel_encap_ops ip6_tun_lwt_ops = {
-- 
2.1.0

[PATCH net-next 4/5] lwtunnel: add options setting and dumping for vxlan

[Xin Long]

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>
---
 include/uapi/linux/lwtunnel.h |  9 ++++++
 net/ipv4/ip_tunnel_core.c     | 67 +++++++++++++++++++++++++++++++++++++++++--
 2 files changed, 74 insertions(+), 2 deletions(-)

diff --git a/include/uapi/linux/lwtunnel.h b/include/uapi/linux/lwtunnel.h
index b595ab2..638b7b1 100644
--- a/include/uapi/linux/lwtunnel.h
+++ b/include/uapi/linux/lwtunnel.h
@@ -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,
 };
 
@@ -67,6 +68,14 @@ 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,
 	LWT_BPF_PROG_NAME,
diff --git a/net/ipv4/ip_tunnel_core.c b/net/ipv4/ip_tunnel_core.c
index 1ec9d94..61be2e0 100644
--- a/net/ipv4/ip_tunnel_core.c
+++ b/net/ipv4/ip_tunnel_core.c
@@ -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;
-- 
2.1.0

[PATCH net-next 5/5] lwtunnel: add options setting and dumping for erspan

[Xin Long]

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_erspan() for .build_state and
ip_tun_fill_encap_opts_erspan() for .fill_encap and
if (tun_flags & TUNNEL_ERSPAN_OPT) for .get_encap_size.

Signed-off-by: Xin Long <lucien.xin@gmail.com>
---
 include/uapi/linux/lwtunnel.h | 12 ++++++
 net/ipv4/ip_tunnel_core.c     | 94 ++++++++++++++++++++++++++++++++++++++++++-
 2 files changed, 104 insertions(+), 2 deletions(-)

diff --git a/include/uapi/linux/lwtunnel.h b/include/uapi/linux/lwtunnel.h
index 638b7b1..f6035f7 100644
--- a/include/uapi/linux/lwtunnel.h
+++ b/include/uapi/linux/lwtunnel.h
@@ -52,6 +52,7 @@ enum {
 	LWTUNNEL_IP_OPTS_UNSPEC,
 	LWTUNNEL_IP_OPTS_GENEVE,
 	LWTUNNEL_IP_OPTS_VXLAN,
+	LWTUNNEL_IP_OPTS_ERSPAN,
 	__LWTUNNEL_IP_OPTS_MAX,
 };
 
@@ -76,6 +77,17 @@ enum {
 #define LWTUNNEL_IP_OPT_VXLAN_MAX (__LWTUNNEL_IP_OPT_VXLAN_MAX - 1)
 
 enum {
+	LWTUNNEL_IP_OPT_ERSPAN_UNSPEC,
+	LWTUNNEL_IP_OPT_ERSPAN_VER,
+	LWTUNNEL_IP_OPT_ERSPAN_INDEX,
+	LWTUNNEL_IP_OPT_ERSPAN_DIR,
+	LWTUNNEL_IP_OPT_ERSPAN_HWID,
+	__LWTUNNEL_IP_OPT_ERSPAN_MAX,
+};
+
+#define LWTUNNEL_IP_OPT_ERSPAN_MAX (__LWTUNNEL_IP_OPT_ERSPAN_MAX - 1)
+
+enum {
 	LWT_BPF_PROG_UNSPEC,
 	LWT_BPF_PROG_FD,
 	LWT_BPF_PROG_NAME,
diff --git a/net/ipv4/ip_tunnel_core.c b/net/ipv4/ip_tunnel_core.c
index 61be2e0..d4f84bf 100644
--- a/net/ipv4/ip_tunnel_core.c
+++ b/net/ipv4/ip_tunnel_core.c
@@ -36,6 +36,7 @@
 #include <net/dst_metadata.h>
 #include <net/geneve.h>
 #include <net/vxlan.h>
+#include <net/erspan.h>
 
 const struct ip_tunnel_encap_ops __rcu *
 		iptun_encaps[MAX_IPTUN_ENCAP_OPS] __read_mostly;
@@ -226,6 +227,7 @@ 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 },
+	[LWTUNNEL_IP_OPTS_ERSPAN]	= { .type = NLA_NESTED },
 };
 
 static const struct nla_policy
@@ -240,6 +242,14 @@ vxlan_opt_policy[LWTUNNEL_IP_OPT_VXLAN_MAX + 1] = {
 	[LWTUNNEL_IP_OPT_VXLAN_GBP]	= { .type = NLA_U32 },
 };
 
+static const struct nla_policy
+erspan_opt_policy[LWTUNNEL_IP_OPT_ERSPAN_MAX + 1] = {
+	[LWTUNNEL_IP_OPT_ERSPAN_VER]	= { .type = NLA_U8 },
+	[LWTUNNEL_IP_OPT_ERSPAN_INDEX]	= { .type = NLA_U32 },
+	[LWTUNNEL_IP_OPT_ERSPAN_DIR]	= { .type = NLA_U8 },
+	[LWTUNNEL_IP_OPT_ERSPAN_HWID]	= { .type = NLA_U8 },
+};
+
 static int ip_tun_parse_opts_geneve(struct nlattr *attr,
 				    struct ip_tunnel_info *info,
 				    struct netlink_ext_ack *extack)
@@ -303,6 +313,46 @@ static int ip_tun_parse_opts_vxlan(struct nlattr *attr,
 	return sizeof(struct vxlan_metadata);
 }
 
+static int ip_tun_parse_opts_erspan(struct nlattr *attr,
+				    struct ip_tunnel_info *info,
+				    struct netlink_ext_ack *extack)
+{
+	struct nlattr *tb[LWTUNNEL_IP_OPT_ERSPAN_MAX + 1];
+	int err;
+
+	err = nla_parse_nested_deprecated(tb, LWTUNNEL_IP_OPT_ERSPAN_MAX,
+					  attr, erspan_opt_policy, extack);
+	if (err)
+		return err;
+
+	if (!tb[LWTUNNEL_IP_OPT_ERSPAN_VER])
+		return -EINVAL;
+
+	if (info) {
+		struct erspan_metadata *md = ip_tunnel_info_opts(info);
+
+		attr = tb[LWTUNNEL_IP_OPT_ERSPAN_VER];
+		md->version = nla_get_u8(attr);
+
+		if (md->version == 1 && tb[LWTUNNEL_IP_OPT_ERSPAN_INDEX]) {
+			attr = tb[LWTUNNEL_IP_OPT_ERSPAN_INDEX];
+			md->u.index = nla_get_be32(attr);
+		} else if (md->version == 2 && tb[LWTUNNEL_IP_OPT_ERSPAN_DIR] &&
+			   tb[LWTUNNEL_IP_OPT_ERSPAN_HWID]) {
+			attr = tb[LWTUNNEL_IP_OPT_ERSPAN_DIR];
+			md->u.md2.dir = nla_get_u8(attr);
+			attr = tb[LWTUNNEL_IP_OPT_ERSPAN_HWID];
+			set_hwid(&md->u.md2, nla_get_u8(attr));
+		} else {
+			return -EINVAL;
+		}
+
+		info->key.tun_flags |= TUNNEL_ERSPAN_OPT;
+	}
+
+	return sizeof(struct erspan_metadata);
+}
+
 static int ip_tun_parse_opts(struct nlattr *attr, struct ip_tunnel_info *info,
 			     struct netlink_ext_ack *extack)
 {
@@ -323,6 +373,9 @@ static int ip_tun_parse_opts(struct nlattr *attr, struct ip_tunnel_info *info,
 	else if (tb[LWTUNNEL_IP_OPTS_VXLAN])
 		err = ip_tun_parse_opts_vxlan(tb[LWTUNNEL_IP_OPTS_VXLAN],
 					      info, extack);
+	else if (tb[LWTUNNEL_IP_OPTS_ERSPAN])
+		err = ip_tun_parse_opts_erspan(tb[LWTUNNEL_IP_OPTS_ERSPAN],
+					       info, extack);
 	else
 		err = -EINVAL;
 
@@ -460,6 +513,37 @@ static int ip_tun_fill_encap_opts_vxlan(struct sk_buff *skb,
 	return 0;
 }
 
+static int ip_tun_fill_encap_opts_erspan(struct sk_buff *skb,
+					 struct ip_tunnel_info *tun_info)
+{
+	struct erspan_metadata *md;
+	struct nlattr *nest;
+
+	nest = nla_nest_start_noflag(skb, LWTUNNEL_IP_OPTS_ERSPAN);
+	if (!nest)
+		return -ENOMEM;
+
+	md = ip_tunnel_info_opts(tun_info);
+	if (nla_put_u32(skb, LWTUNNEL_IP_OPT_ERSPAN_VER, md->version))
+		goto err;
+
+	if (md->version == 1 &&
+	    nla_put_be32(skb, LWTUNNEL_IP_OPT_ERSPAN_INDEX, md->u.index))
+		goto err;
+
+	if (md->version == 2 &&
+	    (nla_put_u8(skb, LWTUNNEL_IP_OPT_ERSPAN_DIR, md->u.md2.dir) ||
+	     nla_put_u8(skb, LWTUNNEL_IP_OPT_ERSPAN_HWID,
+			get_hwid(&md->u.md2))))
+		goto err;
+
+	nla_nest_end(skb, nest);
+	return 0;
+err:
+	nla_nest_cancel(skb, nest);
+	return -ENOMEM;
+}
+
 static int ip_tun_fill_encap_opts(struct sk_buff *skb, int type,
 				  struct ip_tunnel_info *tun_info)
 {
@@ -467,7 +551,7 @@ static int ip_tun_fill_encap_opts(struct sk_buff *skb, int type,
 	int err = 0;
 
 	if (!(tun_info->key.tun_flags &
-	      (TUNNEL_GENEVE_OPT | TUNNEL_VXLAN_OPT)))
+	      (TUNNEL_GENEVE_OPT | TUNNEL_VXLAN_OPT | TUNNEL_ERSPAN_OPT)))
 		return 0;
 
 	nest = nla_nest_start_noflag(skb, type);
@@ -478,6 +562,8 @@ static int ip_tun_fill_encap_opts(struct sk_buff *skb, int type,
 		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);
+	else if (tun_info->key.tun_flags & TUNNEL_ERSPAN_OPT)
+		err = ip_tun_fill_encap_opts_erspan(skb, tun_info);
 
 	if (err) {
 		nla_nest_cancel(skb, nest);
@@ -511,7 +597,7 @@ static int ip_tun_opts_nlsize(struct ip_tunnel_info *info)
 	int opt_len;
 
 	if (!(info->key.tun_flags &
-	      (TUNNEL_GENEVE_OPT | TUNNEL_VXLAN_OPT)))
+	      (TUNNEL_GENEVE_OPT | TUNNEL_VXLAN_OPT | TUNNEL_ERSPAN_OPT)))
 		return 0;
 
 	opt_len = nla_total_size(0);		/* LWTUNNEL_IP_OPTS */
@@ -526,6 +612,10 @@ static int ip_tun_opts_nlsize(struct ip_tunnel_info *info)
 	} 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 */
+	} else if (info->key.tun_flags & TUNNEL_ERSPAN_OPT) {
+		opt_len += nla_total_size(0)	/* LWTUNNEL_IP_OPTS_ERSPAN */
+			   + nla_total_size(1)	/* OPT_ERSPAN_VER */
+			   + nla_total_size(4);	/* OPT_ERSPAN_INDEX/DIR/HWID */
 	}
 
 	return opt_len;
-- 
2.1.0

Re: [PATCH net-next 0/5] lwtunnel: add ip and ip6 options setting and dumping

[Xin Long]

[-- Attachment #1: Type: text/plain, Size: 1069 bytes --]

On Wed, Nov 6, 2019 at 5:01 PM Xin Long <lucien.xin@gmail.com> wrote:
>
> With this patchset, users can configure options by ip route encap
> for geneve, vxlan and ersapn lwtunnel, like:
>
>   # ip r a 1.1.1.0/24 encap ip id 1 geneve class 0 type 0 \
>     data "1212121234567890" dst 10.1.0.2 dev geneve1
>
>   # ip r a 1.1.1.0/24 encap ip id 1 vxlan gbp 456 \
>     dst 10.1.0.2 dev erspan1
>
>   # ip r a 1.1.1.0/24 encap ip id 1 erspan ver 1 idx 123 \
>     dst 10.1.0.2 dev erspan1
>
> iproute side patch is attached on the reply of this mail.
>
> Thank Simon for good advice.
>
> Xin Long (5):
>   lwtunnel: add options process for arp request
>   lwtunnel: add options process for cmp_encap
>   lwtunnel: add options setting and dumping for geneve
>   lwtunnel: add options setting and dumping for vxlan
>   lwtunnel: add options setting and dumping for erspan
>
>  include/uapi/linux/lwtunnel.h |  41 +++++
>  net/ipv4/ip_tunnel_core.c     | 382 +++++++++++++++++++++++++++++++++++++++---
>  2 files changed, 402 insertions(+), 21 deletions(-)
>
> --
> 2.1.0
>

[-- Attachment #2: 0001-iproute_lwtunnel-add-support-options-for-geneve-vxla.patch --]
[-- Type: application/octet-stream, Size: 18962 bytes --]

From 6be78778a9046bdc7430eec6908d06c61ea39ea1 Mon Sep 17 00:00:00 2001
From: Xin Long <lucien.xin@gmail.com>
Date: Tue, 5 Nov 2019 23:42:51 -0500
Subject: [PATCH] iproute_lwtunnel: add support options for geneve/vxlan/erspan
 metadata

1. example for geneve:
  ip net d a; ip net d b; ip net a a; ip net a b
  ip -n a l a eth0 type veth peer name eth0 netns b
  ip -n a l s eth0 up; ip -n b link set eth0 up
  ip -n a a a 10.1.0.1/24 dev eth0; ip -n b a a 10.1.0.2/24 dev eth0
  ip -n b l a erspan1 type geneve id 1 remote 10.1.0.1 ttl 64
  ip -n b a a 1.1.1.1/24 dev erspan1; ip -n b l s erspan1 up
  ip -n b r a 2.1.1.0/24 dev erspan1
  ip -n a l a erspan1 type geneve external
  ip -n a a a 2.1.1.1/24 dev erspan1; ip -n a l s erspan1 up
  ip -n a r a 1.1.1.0/24 encap ip id 1 geneve class 0 type 0 data "1212121234567890" dst 10.1.0.2 dev erspan1
  ip -n a r s; ip net exec a ping 1.1.1.1 -c 1

2. example for vxlan:
  ip net d a; ip net d b; ip net a a; ip net a b
  ip -n a l a eth0 type veth peer name eth0b netns b
  ip -n a l s eth0 up; ip -n b link set eth0b up
  ip -n a a a 10.1.0.1/24 dev eth0; ip -n b a a 10.1.0.2/24 dev eth0b
  ip -n b l a erspan1 type vxlan id 1 local 10.1.0.2 remote 10.1.0.1 dev eth0b ttl 64 gbp
  ip -n b a a 1.1.1.1/24 dev erspan1; ip -n b l s erspan1 up
  ip -n b r a 2.1.1.0/24 dev erspan1
  ip -n a l a erspan1 type vxlan local 10.1.0.1 dev eth0 ttl 64 gbp external
  ip -n a a a 2.1.1.1/24 dev erspan1; ip -n a l s erspan1 up
  ip -n a r a 1.1.1.0/24 encap ip id 1 vxlan gbp 456 dst 10.1.0.2 dev erspan1
  ip -n a r s; ip net exec a ping 1.1.1.1 -c 1

3. example for erspan:
  ip net d a; ip net d b; ip net a a; ip net a b
  ip -n a l a eth0 type veth peer name eth0 netns b
  ip -n a l s eth0 up; ip -n b link set eth0 up
  ip -n a a a 10.1.0.1/24 dev eth0; ip -n b a a 10.1.0.2/24 dev eth0
  ip -n b l a erspan1 type erspan key 1 seq erspan 123 local 10.1.0.2 remote 10.1.0.1
  ip -n b a a 1.1.1.1/24 dev erspan1; ip -n b l s erspan1 up
  ip -n b r a 2.1.1.0/24 dev erspan1
  ip -n a l a erspan1 type erspan key 1 seq local 10.1.0.1 external
  ip -n a a a 2.1.1.1/24 dev erspan1; ip -n a l s erspan1 up
  ip -n a r a 1.1.1.0/24 encap ip id 1 erspan ver 1 idx 123 dst 10.1.0.2 dev erspan1
  ip -n a r s; ip net exec a ping 1.1.1.1 -c 1

Signed-off-by: Xin Long <lucien.xin@gmail.com>
---
 include/uapi/linux/lwtunnel.h |  41 ++++
 ip/iproute_lwtunnel.c         | 355 +++++++++++++++++++++++++++++++++-
 2 files changed, 390 insertions(+), 6 deletions(-)

diff --git a/include/uapi/linux/lwtunnel.h b/include/uapi/linux/lwtunnel.h
index 3f3fe6f3..d2ee622d 100644
--- a/include/uapi/linux/lwtunnel.h
+++ b/include/uapi/linux/lwtunnel.h
@@ -27,6 +27,7 @@ enum lwtunnel_ip_t {
 	LWTUNNEL_IP_TOS,
 	LWTUNNEL_IP_FLAGS,
 	LWTUNNEL_IP_PAD,
+	LWTUNNEL_IP_OPTS,
 	__LWTUNNEL_IP_MAX,
 };
 
@@ -41,6 +42,7 @@ enum lwtunnel_ip6_t {
 	LWTUNNEL_IP6_TC,
 	LWTUNNEL_IP6_FLAGS,
 	LWTUNNEL_IP6_PAD,
+	LWTUNNEL_IP6_OPTS,
 	__LWTUNNEL_IP6_MAX,
 };
 
@@ -68,4 +70,43 @@ enum {
 
 #define LWT_BPF_MAX_HEADROOM 256
 
+enum {
+	LWTUNNEL_IP_OPTS_UNSPEC,
+	LWTUNNEL_IP_OPTS_GENEVE,
+	LWTUNNEL_IP_OPTS_VXLAN,
+	LWTUNNEL_IP_OPTS_ERSPAN,
+	__LWTUNNEL_IP_OPTS_MAX,
+};
+
+#define LWTUNNEL_IP_OPTS_MAX (__LWTUNNEL_IP_OPTS_MAX - 1)
+
+enum {
+	LWTUNNEL_IP_OPT_GENEVE_UNSPEC,
+	LWTUNNEL_IP_OPT_GENEVE_CLASS,
+	LWTUNNEL_IP_OPT_GENEVE_TYPE,
+	LWTUNNEL_IP_OPT_GENEVE_DATA,
+	__LWTUNNEL_IP_OPT_GENEVE_MAX,
+};
+
+#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 {
+	LWTUNNEL_IP_OPT_ERSPAN_UNSPEC,
+	LWTUNNEL_IP_OPT_ERSPAN_VER,
+	LWTUNNEL_IP_OPT_ERSPAN_INDEX,
+	LWTUNNEL_IP_OPT_ERSPAN_DIR,
+	LWTUNNEL_IP_OPT_ERSPAN_HWID,
+	__LWTUNNEL_IP_OPT_ERSPAN_MAX,
+};
+
+#define LWTUNNEL_IP_OPT_ERSPAN_MAX (__LWTUNNEL_IP_OPT_ERSPAN_MAX - 1)
+
 #endif /* _LWTUNNEL_H_ */
diff --git a/ip/iproute_lwtunnel.c b/ip/iproute_lwtunnel.c
index 03217b8f..03c3098a 100644
--- a/ip/iproute_lwtunnel.c
+++ b/ip/iproute_lwtunnel.c
@@ -32,6 +32,7 @@
 #include <linux/seg6_hmac.h>
 #include <linux/seg6_local.h>
 #include <linux/if_tunnel.h>
+#include <linux/erspan.h>
 
 static const char *format_encap_type(int type)
 {
@@ -294,7 +295,7 @@ static void print_encap_mpls(FILE *fp, struct rtattr *encap)
 static void print_encap_ip(FILE *fp, struct rtattr *encap)
 {
 	struct rtattr *tb[LWTUNNEL_IP_MAX+1];
-	__u16 flags;
+	__u16 flags = 0;
 
 	parse_rtattr_nested(tb, LWTUNNEL_IP_MAX, encap);
 
@@ -329,6 +330,60 @@ static void print_encap_ip(FILE *fp, struct rtattr *encap)
 		if (flags & TUNNEL_SEQ)
 			print_bool(PRINT_ANY, "seq", "seq ", true);
 	}
+
+	if (tb[LWTUNNEL_IP_OPTS]) {
+		struct rtattr *tb_opt[LWTUNNEL_IP_OPTS_MAX+1];
+
+		parse_rtattr_nested(tb_opt, LWTUNNEL_IP_OPTS_MAX, tb[LWTUNNEL_IP_OPTS]);
+
+		if ((flags & TUNNEL_ERSPAN_OPT) && tb_opt[LWTUNNEL_IP_OPTS_ERSPAN]) {
+			struct rtattr *tb_esn[LWTUNNEL_IP_OPT_ERSPAN_MAX+1];
+			struct erspan_metadata em;
+
+			memset(&em, 0, sizeof(em));
+			parse_rtattr_nested(tb_esn, LWTUNNEL_IP_OPT_ERSPAN_MAX, tb_opt[LWTUNNEL_IP_OPTS_ERSPAN]);
+			em.version = rta_getattr_u8(tb_esn[LWTUNNEL_IP_OPT_ERSPAN_VER]);
+			if (em.version == 1) {
+				em.u.index = rta_getattr_u32(tb_esn[LWTUNNEL_IP_OPT_ERSPAN_INDEX]);
+				print_bool(PRINT_ANY, "erspan", "erspan ", true);
+				print_uint(PRINT_ANY, "ver", "ver %u ", 1);
+				print_uint(PRINT_ANY, "idx", "idx %u ",
+						ntohl(em.u.index));
+			} else if (em.version == 2) {
+				em.u.md2.dir = rta_getattr_u8(tb_esn[LWTUNNEL_IP_OPT_ERSPAN_DIR]);
+				em.u.md2.hwid = rta_getattr_u16(tb_esn[LWTUNNEL_IP_OPT_ERSPAN_HWID]);
+				print_bool(PRINT_ANY, "erspan", "erspan ", true);
+				print_uint(PRINT_ANY, "ver", "ver %u ", 2);
+				print_color_string(PRINT_ANY, COLOR_INET,
+						"dir", "dir %s ",
+						em.u.md2.dir ? "ingress" : "exgress");
+				print_uint(PRINT_ANY, "hwid", "hwid %u ", em.u.md2.hwid);
+			}
+		} else if ((flags & TUNNEL_VXLAN_OPT) && tb_opt[LWTUNNEL_IP_OPTS_VXLAN]) {
+			struct rtattr *tb_esn[LWTUNNEL_IP_OPT_VXLAN_MAX+1];
+			unsigned int gbp;
+
+			parse_rtattr_nested(tb_esn, LWTUNNEL_IP_OPT_VXLAN_MAX, tb_opt[LWTUNNEL_IP_OPTS_VXLAN]);
+			gbp = rta_getattr_u32(tb_esn[LWTUNNEL_IP_OPT_VXLAN_GBP]);
+			print_bool(PRINT_ANY, "vxlan", "vxlan ", true);
+			print_uint(PRINT_ANY, "gbp", "gbp %u ", gbp);
+		} else if ((flags & TUNNEL_GENEVE_OPT) && tb_opt[LWTUNNEL_IP_OPTS_GENEVE]) {
+			struct rtattr *tb_esn[LWTUNNEL_IP_OPT_GENEVE_MAX+1];
+			char data[128] = { 0 };
+			__u16 class;
+			__u8 type;
+
+			parse_rtattr_nested(tb_esn, LWTUNNEL_IP_OPT_GENEVE_MAX, tb_opt[LWTUNNEL_IP_OPTS_GENEVE]);
+			class = rta_getattr_u16(tb_esn[LWTUNNEL_IP_OPT_GENEVE_CLASS]);
+			type = rta_getattr_u8(tb_esn[LWTUNNEL_IP_OPT_GENEVE_TYPE]);
+			hexstring_n2a(RTA_DATA(tb_esn[LWTUNNEL_IP_OPT_GENEVE_DATA]),
+				      RTA_PAYLOAD(tb_esn[LWTUNNEL_IP_OPT_GENEVE_DATA]), data, sizeof(data));
+			print_bool(PRINT_ANY, "geneve", "geneve ", true);
+			print_uint(PRINT_ANY, "class", "class %u ", class);
+			print_uint(PRINT_ANY, "type", "type %u ", type);
+			print_color_string(PRINT_ANY, COLOR_INET, "data", "data %s ", data);
+		}
+	}
 }
 
 static void print_encap_ila(FILE *fp, struct rtattr *encap)
@@ -365,7 +420,7 @@ static void print_encap_ila(FILE *fp, struct rtattr *encap)
 static void print_encap_ip6(FILE *fp, struct rtattr *encap)
 {
 	struct rtattr *tb[LWTUNNEL_IP6_MAX+1];
-	__u16 flags;
+	__u16 flags = 0;
 
 	parse_rtattr_nested(tb, LWTUNNEL_IP6_MAX, encap);
 
@@ -401,6 +456,59 @@ static void print_encap_ip6(FILE *fp, struct rtattr *encap)
 		if (flags & TUNNEL_SEQ)
 			print_bool(PRINT_ANY, "seq", "seq ", true);
 	}
+	if (tb[LWTUNNEL_IP6_OPTS]) {
+		struct rtattr *tb_opt[LWTUNNEL_IP_OPTS_MAX+1];
+
+		parse_rtattr_nested(tb_opt, LWTUNNEL_IP_OPTS_MAX, tb[LWTUNNEL_IP6_OPTS]);
+
+		if ((flags & TUNNEL_ERSPAN_OPT) && tb_opt[LWTUNNEL_IP_OPTS_ERSPAN]) {
+			struct rtattr *tb_esn[LWTUNNEL_IP_OPT_ERSPAN_MAX+1];
+			struct erspan_metadata em;
+
+			memset(&em, 0, sizeof(em));
+			parse_rtattr_nested(tb_esn, LWTUNNEL_IP_OPT_ERSPAN_MAX, tb_opt[LWTUNNEL_IP_OPTS_ERSPAN]);
+			em.version = rta_getattr_u8(tb_esn[LWTUNNEL_IP_OPT_ERSPAN_VER]);
+			if (em.version == 1) {
+				em.u.index = rta_getattr_u32(tb_esn[LWTUNNEL_IP_OPT_ERSPAN_INDEX]);
+				print_bool(PRINT_ANY, "erspan", "erspan ", true);
+				print_uint(PRINT_ANY, "ver", "ver %u ", 1);
+				print_uint(PRINT_ANY, "idx", "idx %u ",
+						ntohl(em.u.index));
+			} else if (em.version == 2) {
+				em.u.md2.dir = rta_getattr_u8(tb_esn[LWTUNNEL_IP_OPT_ERSPAN_DIR]);
+				em.u.md2.hwid = rta_getattr_u16(tb_esn[LWTUNNEL_IP_OPT_ERSPAN_HWID]);
+				print_bool(PRINT_ANY, "erspan", "erspan ", true);
+				print_uint(PRINT_ANY, "ver", "ver %u ", 2);
+				print_color_string(PRINT_ANY, COLOR_INET,
+						"dir", "dir %s ",
+						em.u.md2.dir ? "ingress" : "exgress");
+				print_uint(PRINT_ANY, "hwid", "hwid %u ", em.u.md2.hwid);
+			}
+		} else if ((flags & TUNNEL_VXLAN_OPT) && tb_opt[LWTUNNEL_IP_OPTS_VXLAN]) {
+			struct rtattr *tb_esn[LWTUNNEL_IP_OPT_VXLAN_MAX+1];
+			unsigned int gbp;
+
+			parse_rtattr_nested(tb_esn, LWTUNNEL_IP_OPT_VXLAN_MAX, tb_opt[LWTUNNEL_IP_OPTS_VXLAN]);
+			gbp = rta_getattr_u32(tb_esn[LWTUNNEL_IP_OPT_VXLAN_GBP]);
+			print_bool(PRINT_ANY, "vxlan", "vxlan ", true);
+			print_uint(PRINT_ANY, "gbp", "gbp %u ", gbp);
+		} else if ((flags & TUNNEL_GENEVE_OPT) && tb_opt[LWTUNNEL_IP_OPTS_GENEVE]) {
+			struct rtattr *tb_esn[LWTUNNEL_IP_OPT_GENEVE_MAX+1];
+			char data[128] = { };
+			__u16 class;
+			__u8 type;
+
+			parse_rtattr_nested(tb_esn, LWTUNNEL_IP_OPT_GENEVE_MAX, tb_opt[LWTUNNEL_IP_OPTS_GENEVE]);
+			class = rta_getattr_u16(tb_esn[LWTUNNEL_IP_OPT_GENEVE_CLASS]);
+			type = rta_getattr_u8(tb_esn[LWTUNNEL_IP_OPT_GENEVE_TYPE]);
+			hexstring_n2a(RTA_DATA(tb_esn[LWTUNNEL_IP_OPT_GENEVE_DATA]),
+				      RTA_PAYLOAD(tb_esn[LWTUNNEL_IP_OPT_GENEVE_DATA]), data, sizeof(data));
+			print_bool(PRINT_ANY, "geneve", "geneve ", true);
+			print_uint(PRINT_ANY, "class", "class %u ", class);
+			print_uint(PRINT_ANY, "type", "type %u ", type);
+			print_color_string(PRINT_ANY, COLOR_INET, "data", "data %s ", data);
+		}
+	}
 }
 
 static void print_encap_bpf(FILE *fp, struct rtattr *encap)
@@ -799,10 +907,10 @@ static int parse_encap_ip(struct rtattr *rta, size_t len,
 			  int *argcp, char ***argvp)
 {
 	int id_ok = 0, dst_ok = 0, src_ok = 0, tos_ok = 0, ttl_ok = 0;
-	int key_ok = 0, csum_ok = 0, seq_ok = 0;
+	int key_ok = 0, csum_ok = 0, seq_ok = 0, erspan_ok = 0;
 	char **argv = *argvp;
 	int argc = *argcp;
-	int ret = 0;
+	int ret = 0, data_len;
 	__u16 flags = 0;
 
 	while (argc > 0) {
@@ -851,6 +959,124 @@ static int parse_encap_ip(struct rtattr *rta, size_t len,
 			if (get_u8(&ttl, *argv, 0))
 				invarg("\"ttl\" value is invalid\n", *argv);
 			ret = rta_addattr8(rta, len, LWTUNNEL_IP_TTL, ttl);
+		} else if (strcmp(*argv, "erspan") == 0) {
+			struct rtattr *nest, *nest2;
+			struct erspan_metadata em;
+
+			memset(&em, 0, sizeof(em));
+
+			if (erspan_ok++)
+				duparg2("erspan", *argv);
+
+			nest = rta_nest(rta, len, LWTUNNEL_IP_OPTS);
+			nest2 = rta_nest(rta, len, LWTUNNEL_IP_OPTS_ERSPAN);
+			{
+				flags |= TUNNEL_ERSPAN_OPT;
+				NEXT_ARG();
+				if (strcmp(*argv, "ver"))
+					duparg2("ver", *argv);
+				NEXT_ARG();
+				if (get_s32(&em.version, *argv, 0) ||
+						(em.version != 1 && em.version != 2))
+					invarg("\"tos\" value is invalid\n", *argv);
+				NEXT_ARG();
+				if (em.version == 1) {
+					if (strcmp(*argv, "idx"))
+						duparg2("idx", *argv);
+					NEXT_ARG();
+					if (get_be32(&em.u.index, *argv, 0))
+						invarg("\"idx\" value is invalid\n", *argv);
+				} else {
+					__u8 hwid;
+
+					if (strcmp(*argv, "dir"))
+						duparg2("dir", *argv);
+					NEXT_ARG();
+					if (strcmp(*argv, "ingress") == 0)
+						em.u.md2.dir = 0;
+					else if (strcmp(*argv, "exgress") == 0)
+						em.u.md2.dir = 1;
+					else
+						invarg("\"dir\" value is invalid\n", *argv);
+					NEXT_ARG();
+					if (strcmp(*argv, "hwid"))
+						duparg2("hwid", *argv);
+					NEXT_ARG();
+					if (get_u8(&hwid, *argv, 0))
+						invarg("\"hwid\" value is invalid\n", *argv);
+					em.u.md2.hwid = hwid;
+				}
+				ret = rta_addattr8(rta, len, LWTUNNEL_IP_OPT_ERSPAN_VER, em.version);
+				if (em.version == 1) {
+					ret = rta_addattr32(rta, len, LWTUNNEL_IP_OPT_ERSPAN_INDEX, em.u.index);
+				} else {
+					ret = rta_addattr8(rta, len, LWTUNNEL_IP_OPT_ERSPAN_DIR, em.u.md2.dir);
+					ret = rta_addattr16(rta, len, LWTUNNEL_IP_OPT_ERSPAN_HWID, em.u.md2.hwid);
+				}
+			}
+			rta_nest_end(rta, nest2);
+			rta_nest_end(rta, nest);
+		} else if (strcmp(*argv, "vxlan") == 0) {
+			struct rtattr *nest, *nest2;
+			unsigned int gbp;
+
+			if (erspan_ok++)
+				duparg2("erspan", *argv);
+
+			nest = rta_nest(rta, len, LWTUNNEL_IP_OPTS);
+			nest2 = rta_nest(rta, len, LWTUNNEL_IP_OPTS_VXLAN);
+			{
+				flags |= TUNNEL_VXLAN_OPT;
+				NEXT_ARG();
+				if (strcmp(*argv, "gbp"))
+					duparg2("gbp", *argv);
+				NEXT_ARG();
+				if (get_u32(&gbp, *argv, 0))
+					invarg("\"gbp\" value is invalid\n", *argv);
+				ret = rta_addattr32(rta, len, LWTUNNEL_IP_OPT_VXLAN_GBP, gbp);
+			}
+			rta_nest_end(rta, nest2);
+			rta_nest_end(rta, nest);
+		} else if (strcmp(*argv, "geneve") == 0) {
+			struct rtattr *nest, *nest2;
+			uint8_t data[128] = { 0 };
+			__u16 class;
+			__u8 type;
+
+			if (erspan_ok++)
+				duparg2("erspan", *argv);
+
+			nest = rta_nest(rta, len, LWTUNNEL_IP_OPTS);
+			nest2 = rta_nest(rta, len, LWTUNNEL_IP_OPTS_GENEVE);
+			{
+				flags |= TUNNEL_GENEVE_OPT;
+				NEXT_ARG();
+				if (strcmp(*argv, "class"))
+					duparg2("class", *argv);
+				NEXT_ARG();
+				if (get_u16(&class, *argv, 0))
+					invarg("\"class\" value is invalid\n", *argv);
+				NEXT_ARG();
+				if (strcmp(*argv, "type"))
+					duparg2("type", *argv);
+				NEXT_ARG();
+				if (get_u8(&type, *argv, 0))
+					invarg("\"type\" value is invalid\n", *argv);
+				NEXT_ARG();
+				if (strcmp(*argv, "data"))
+					duparg2("data", *argv);
+				NEXT_ARG();
+				data_len = strlen(*argv);
+				if (!data_len)
+					break;
+				if (hex2mem(*argv, data, data_len / 2) < 0)
+					invarg("\"data\" value is invalid\n", *argv);
+				ret = rta_addattr_l(rta, len, LWTUNNEL_IP_OPT_GENEVE_DATA, data, data_len / 2);
+				ret = rta_addattr16(rta, len, LWTUNNEL_IP_OPT_GENEVE_CLASS, class);
+				ret = rta_addattr8(rta, len, LWTUNNEL_IP_OPT_GENEVE_TYPE, type);
+			}
+			rta_nest_end(rta, nest2);
+			rta_nest_end(rta, nest);
 		} else if (strcmp(*argv, "key") == 0) {
 			if (key_ok++)
 				duparg2("key", *argv);
@@ -966,10 +1192,10 @@ static int parse_encap_ip6(struct rtattr *rta, size_t len,
 			   int *argcp, char ***argvp)
 {
 	int id_ok = 0, dst_ok = 0, src_ok = 0, tos_ok = 0, ttl_ok = 0;
-	int key_ok = 0, csum_ok = 0, seq_ok = 0;
+	int key_ok = 0, csum_ok = 0, seq_ok = 0, erspan_ok = 0;
 	char **argv = *argvp;
 	int argc = *argcp;
-	int ret = 0;
+	int ret = 0, data_len;
 	__u16 flags = 0;
 
 	while (argc > 0) {
@@ -1024,6 +1250,123 @@ static int parse_encap_ip6(struct rtattr *rta, size_t len,
 			if (key_ok++)
 				duparg2("key", *argv);
 			flags |= TUNNEL_KEY;
+		} else if (strcmp(*argv, "erspan") == 0) {
+			struct rtattr *nest, *nest2;
+			struct erspan_metadata em;
+
+			memset(&em, 0, sizeof(em));
+
+			nest = rta_nest(rta, len, LWTUNNEL_IP6_OPTS);
+			nest2 = rta_nest(rta, len, LWTUNNEL_IP_OPTS_ERSPAN);
+			{
+				if (erspan_ok++)
+					duparg2("erspan", *argv);
+				flags |= TUNNEL_ERSPAN_OPT;
+				NEXT_ARG();
+				if (strcmp(*argv, "ver"))
+					duparg2("ver", *argv);
+				NEXT_ARG();
+				if (get_s32(&em.version, *argv, 0) ||
+						(em.version != 1 && em.version != 2))
+					invarg("\"tos\" value is invalid\n", *argv);
+				NEXT_ARG();
+				if (em.version == 1) {
+					if (strcmp(*argv, "idx"))
+						duparg2("idx", *argv);
+					NEXT_ARG();
+					if (get_be32(&em.u.index, *argv, 0))
+						invarg("\"idx\" value is invalid\n", *argv);
+				} else {
+					__u8 hwid;
+
+					if (strcmp(*argv, "dir"))
+						duparg2("dir", *argv);
+					NEXT_ARG();
+					if (strcmp(*argv, "ingress") == 0)
+						em.u.md2.dir = 0;
+					else if (strcmp(*argv, "exgress") == 0)
+						em.u.md2.dir = 1;
+					else
+						invarg("\"dir\" value is invalid\n", *argv);
+					NEXT_ARG();
+					if (strcmp(*argv, "hwid"))
+						duparg2("hwid", *argv);
+					NEXT_ARG();
+					if (get_u8(&hwid, *argv, 0))
+						invarg("\"hwid\" value is invalid\n", *argv);
+					em.u.md2.hwid = hwid;
+				}
+				ret = rta_addattr8(rta, len, LWTUNNEL_IP_OPT_ERSPAN_VER, em.version);
+				if (em.version == 1) {
+					ret = rta_addattr32(rta, len, LWTUNNEL_IP_OPT_ERSPAN_INDEX, em.u.index);
+				} else {
+					ret = rta_addattr8(rta, len, LWTUNNEL_IP_OPT_ERSPAN_DIR, em.u.md2.dir);
+					ret = rta_addattr16(rta, len, LWTUNNEL_IP_OPT_ERSPAN_HWID, em.u.md2.hwid);
+				}
+			}
+			rta_nest_end(rta, nest2);
+			rta_nest_end(rta, nest);
+		} else if (strcmp(*argv, "vxlan") == 0) {
+			struct rtattr *nest, *nest2;
+			unsigned int gbp;
+
+			if (erspan_ok++)
+				duparg2("erspan", *argv);
+
+			nest = rta_nest(rta, len, LWTUNNEL_IP6_OPTS);
+			nest2 = rta_nest(rta, len, LWTUNNEL_IP_OPTS_VXLAN);
+			{
+				flags |= TUNNEL_VXLAN_OPT;
+				NEXT_ARG();
+				if (strcmp(*argv, "gbp"))
+					duparg2("gbp", *argv);
+				NEXT_ARG();
+				if (get_u32(&gbp, *argv, 0))
+					invarg("\"gbp\" value is invalid\n", *argv);
+				ret = rta_addattr32(rta, len, LWTUNNEL_IP_OPT_VXLAN_GBP, gbp);
+			}
+			rta_nest_end(rta, nest2);
+			rta_nest_end(rta, nest);
+		} else if (strcmp(*argv, "geneve") == 0) {
+			struct rtattr *nest, *nest2;
+			uint8_t data[128] = { };
+			__u16 class;
+			__u8 type;
+
+			if (erspan_ok++)
+				duparg2("erspan", *argv);
+
+			nest = rta_nest(rta, len, LWTUNNEL_IP6_OPTS);
+			nest2 = rta_nest(rta, len, LWTUNNEL_IP_OPTS_GENEVE);
+			{
+				flags |= TUNNEL_GENEVE_OPT;
+				NEXT_ARG();
+				if (strcmp(*argv, "class"))
+					duparg2("class", *argv);
+				NEXT_ARG();
+				if (get_u16(&class, *argv, 0))
+					invarg("\"class\" value is invalid\n", *argv);
+				NEXT_ARG();
+				if (strcmp(*argv, "type"))
+					duparg2("type", *argv);
+				NEXT_ARG();
+				if (get_u8(&type, *argv, 0))
+					invarg("\"type\" value is invalid\n", *argv);
+				NEXT_ARG();
+				if (strcmp(*argv, "data"))
+					duparg2("data", *argv);
+				NEXT_ARG();
+				data_len = strlen(*argv);
+				if (!data_len)
+					break;
+				if (hex2mem(*argv, data, data_len / 2) < 0)
+					invarg("\"data\" value is invalid\n", *argv);
+				ret = rta_addattr_l(rta, len, LWTUNNEL_IP_OPT_GENEVE_DATA, data, data_len / 2);
+				ret = rta_addattr16(rta, len, LWTUNNEL_IP_OPT_GENEVE_CLASS, class);
+				ret = rta_addattr8(rta, len, LWTUNNEL_IP_OPT_GENEVE_TYPE, type);
+			}
+			rta_nest_end(rta, nest2);
+			rta_nest_end(rta, nest);
 		} else if (strcmp(*argv, "csum") == 0) {
 			if (csum_ok++)
 				duparg2("csum", *argv);
-- 
2.18.1

Re: [PATCH net-next 0/5] lwtunnel: add ip and ip6 options setting and dumping

[David Miller]

From: Xin Long <lucien.xin@gmail.com>
Date: Wed,  6 Nov 2019 17:01:02 +0800

> With this patchset, users can configure options by ip route encap
> for geneve, vxlan and ersapn lwtunnel, like:
> 
>   # ip r a 1.1.1.0/24 encap ip id 1 geneve class 0 type 0 \
>     data "1212121234567890" dst 10.1.0.2 dev geneve1
> 
>   # ip r a 1.1.1.0/24 encap ip id 1 vxlan gbp 456 \
>     dst 10.1.0.2 dev erspan1
> 
>   # ip r a 1.1.1.0/24 encap ip id 1 erspan ver 1 idx 123 \
>     dst 10.1.0.2 dev erspan1
> 
> iproute side patch is attached on the reply of this mail.
> 
> Thank Simon for good advice.

Series applied, looks good.

Can you comment about how this code is using the deprecated nla
parsers for new options?

Thank you.

Re: [PATCH net-next 0/5] lwtunnel: add ip and ip6 options setting and dumping

[Xin Long]

On Thu, Nov 7, 2019 at 1:15 PM David Miller <davem@davemloft.net> wrote:
>
> From: Xin Long <lucien.xin@gmail.com>
> Date: Wed,  6 Nov 2019 17:01:02 +0800
>
> > With this patchset, users can configure options by ip route encap
> > for geneve, vxlan and ersapn lwtunnel, like:
> >
> >   # ip r a 1.1.1.0/24 encap ip id 1 geneve class 0 type 0 \
> >     data "1212121234567890" dst 10.1.0.2 dev geneve1
> >
> >   # ip r a 1.1.1.0/24 encap ip id 1 vxlan gbp 456 \
> >     dst 10.1.0.2 dev erspan1
> >
> >   # ip r a 1.1.1.0/24 encap ip id 1 erspan ver 1 idx 123 \
> >     dst 10.1.0.2 dev erspan1
> >
> > iproute side patch is attached on the reply of this mail.
> >
> > Thank Simon for good advice.
>
> Series applied, looks good.
>
> Can you comment about how this code is using the deprecated nla
> parsers for new options?
I didn't think too much, just used what it's using in cls_flower.c and
act_tunnel_key.c to parse GENEVE options.

Now think about it again, nla_parse_nested() should always be used on
new options, should I post a fix for it? since no code to access this
from userspace yet.

Re: [PATCH net-next 0/5] lwtunnel: add ip and ip6 options setting and dumping

[David Ahern]

On 11/7/19 3:50 AM, Xin Long wrote:
> Now think about it again, nla_parse_nested() should always be used on
> new options, should I post a fix for it? since no code to access this
> from userspace yet.

please do. All new options should use strict parsing from the beginning.
And you should be able to set LWTUNNEL_IP_OPT_GENEVE_UNSPEC to
.strict_start_type = LWTUNNEL_IP_OPT_GENEVE_UNSPEC + 1 in the policy so
that new command using new option on an old kernel throws an error.

Re: [PATCH net-next 0/5] lwtunnel: add ip and ip6 options setting and dumping

[Xin Long]

On Fri, Nov 8, 2019 at 12:18 AM David Ahern <dsahern@gmail.com> wrote:
>
> On 11/7/19 3:50 AM, Xin Long wrote:
> > Now think about it again, nla_parse_nested() should always be used on
> > new options, should I post a fix for it? since no code to access this
> > from userspace yet.
>
> please do. All new options should use strict parsing from the beginning.
> And you should be able to set LWTUNNEL_IP_OPT_GENEVE_UNSPEC to
> .strict_start_type = LWTUNNEL_IP_OPT_GENEVE_UNSPEC + 1 in the policy so
> that new command using new option on an old kernel throws an error.
I'm not sure if strict_start_type is needed when using nla_parse_nested().

.strict_start_type seems only checked in validate_nla():

        if (strict_start_type && type >= strict_start_type)
                validate |= NL_VALIDATE_STRICT; <------ [1]

But in the path of:
  nla_parse_nested() ->
    __nla_parse() ->
      __nla_validate_parse() ->
        validate_nla()

The param 'validate' is always NL_VALIDATE_STRICT, no matter Code [1] is
triggered or not. or am I missing something here?

Re: [PATCH net-next 0/5] lwtunnel: add ip and ip6 options setting and dumping

[David Ahern]

On 11/8/19 7:08 AM, Xin Long wrote:
> On Fri, Nov 8, 2019 at 12:18 AM David Ahern <dsahern@gmail.com> wrote:
>>
>> On 11/7/19 3:50 AM, Xin Long wrote:
>>> Now think about it again, nla_parse_nested() should always be used on
>>> new options, should I post a fix for it? since no code to access this
>>> from userspace yet.
>>
>> please do. All new options should use strict parsing from the beginning.
>> And you should be able to set LWTUNNEL_IP_OPT_GENEVE_UNSPEC to
>> .strict_start_type = LWTUNNEL_IP_OPT_GENEVE_UNSPEC + 1 in the policy so
>> that new command using new option on an old kernel throws an error.
> I'm not sure if strict_start_type is needed when using nla_parse_nested().
> 
> .strict_start_type seems only checked in validate_nla():
> 
>         if (strict_start_type && type >= strict_start_type)
>                 validate |= NL_VALIDATE_STRICT; <------ [1]
> 
> But in the path of:
>   nla_parse_nested() ->
>     __nla_parse() ->
>       __nla_validate_parse() ->
>         validate_nla()
> 
> The param 'validate' is always NL_VALIDATE_STRICT, no matter Code [1] is
> triggered or not. or am I missing something here?
> 

ok, I missed that.

Re: [PATCH net-next 0/5] lwtunnel: add ip and ip6 options setting and dumping

[David Miller]

From: Xin Long <lucien.xin@gmail.com>
Date: Thu, 7 Nov 2019 18:50:15 +0800

> Now think about it again, nla_parse_nested() should always be used on
> new options, should I post a fix for it? since no code to access this
> from userspace yet.

If that is true, yes you should.