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authorXin Long <lucien.xin@gmail.com>2019-11-21 13:03:27 +0300
committerDavid S. Miller <davem@davemloft.net>2019-11-21 22:44:06 +0300
commite20d4ff2acd7db2ffce64a6ddbdaeec43a8eec19 (patch)
treea8c62b6d1b3d048ac3aad13f84d944d524a2b10b
parentfca3f91cc38ad866c995fb099d961b31cd687849 (diff)
downloadlinux-e20d4ff2acd7db2ffce64a6ddbdaeec43a8eec19.tar.xz
net: sched: add erspan option support to act_tunnel_key
This patch is to allow setting erspan options using the act_tunnel_key action. Different from geneve options, only one option can be set. And also, geneve options, vxlan options or erspan options can't be set at the same time. Options are expressed as ver:index:dir:hwid, when ver is set to 1, index will be applied while dir and hwid will be ignored, and when ver is set to 2, dir and hwid will be used while index will be ignored. # ip link add name erspan1 type erspan external # tc qdisc add dev eth0 ingress # tc filter add dev eth0 protocol ip parent ffff: \ flower indev eth0 \ ip_proto udp \ action tunnel_key \ set src_ip 10.0.99.192 \ dst_ip 10.0.99.193 \ dst_port 6081 \ id 11 \ erspan_opts 1:2:0:0 \ action mirred egress redirect dev erspan1 v1->v2: - do the validation when dst is not yet allocated as Jakub suggested. - use Duplicate instead of Wrong in err msg for extack. Signed-off-by: Xin Long <lucien.xin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--include/uapi/linux/tc_act/tc_tunnel_key.h16
-rw-r--r--net/sched/act_tunnel_key.c118
2 files changed, 134 insertions, 0 deletions
diff --git a/include/uapi/linux/tc_act/tc_tunnel_key.h b/include/uapi/linux/tc_act/tc_tunnel_key.h
index f302c2a76953..3f10dc4e7a4b 100644
--- a/include/uapi/linux/tc_act/tc_tunnel_key.h
+++ b/include/uapi/linux/tc_act/tc_tunnel_key.h
@@ -54,6 +54,10 @@ enum {
* TCA_TUNNEL_KEY_ENC_OPTS_
* attributes
*/
+ TCA_TUNNEL_KEY_ENC_OPTS_ERSPAN, /* Nested
+ * TCA_TUNNEL_KEY_ENC_OPTS_
+ * attributes
+ */
__TCA_TUNNEL_KEY_ENC_OPTS_MAX,
};
@@ -80,4 +84,16 @@ enum {
#define TCA_TUNNEL_KEY_ENC_OPT_VXLAN_MAX \
(__TCA_TUNNEL_KEY_ENC_OPT_VXLAN_MAX - 1)
+enum {
+ TCA_TUNNEL_KEY_ENC_OPT_ERSPAN_UNSPEC,
+ TCA_TUNNEL_KEY_ENC_OPT_ERSPAN_VER, /* u8 */
+ TCA_TUNNEL_KEY_ENC_OPT_ERSPAN_INDEX, /* be32 */
+ TCA_TUNNEL_KEY_ENC_OPT_ERSPAN_DIR, /* u8 */
+ TCA_TUNNEL_KEY_ENC_OPT_ERSPAN_HWID, /* u8 */
+ __TCA_TUNNEL_KEY_ENC_OPT_ERSPAN_MAX,
+};
+
+#define TCA_TUNNEL_KEY_ENC_OPT_ERSPAN_MAX \
+ (__TCA_TUNNEL_KEY_ENC_OPT_ERSPAN_MAX - 1)
+
#endif
diff --git a/net/sched/act_tunnel_key.c b/net/sched/act_tunnel_key.c
index ff0909b57511..30b58256d3da 100644
--- a/net/sched/act_tunnel_key.c
+++ b/net/sched/act_tunnel_key.c
@@ -11,6 +11,7 @@
#include <linux/rtnetlink.h>
#include <net/geneve.h>
#include <net/vxlan.h>
+#include <net/erspan.h>
#include <net/netlink.h>
#include <net/pkt_sched.h>
#include <net/dst.h>
@@ -58,6 +59,7 @@ enc_opts_policy[TCA_TUNNEL_KEY_ENC_OPTS_MAX + 1] = {
.strict_start_type = TCA_TUNNEL_KEY_ENC_OPTS_VXLAN },
[TCA_TUNNEL_KEY_ENC_OPTS_GENEVE] = { .type = NLA_NESTED },
[TCA_TUNNEL_KEY_ENC_OPTS_VXLAN] = { .type = NLA_NESTED },
+ [TCA_TUNNEL_KEY_ENC_OPTS_ERSPAN] = { .type = NLA_NESTED },
};
static const struct nla_policy
@@ -73,6 +75,14 @@ vxlan_opt_policy[TCA_TUNNEL_KEY_ENC_OPT_VXLAN_MAX + 1] = {
[TCA_TUNNEL_KEY_ENC_OPT_VXLAN_GBP] = { .type = NLA_U32 },
};
+static const struct nla_policy
+erspan_opt_policy[TCA_TUNNEL_KEY_ENC_OPT_ERSPAN_MAX + 1] = {
+ [TCA_TUNNEL_KEY_ENC_OPT_ERSPAN_VER] = { .type = NLA_U8 },
+ [TCA_TUNNEL_KEY_ENC_OPT_ERSPAN_INDEX] = { .type = NLA_U32 },
+ [TCA_TUNNEL_KEY_ENC_OPT_ERSPAN_DIR] = { .type = NLA_U8 },
+ [TCA_TUNNEL_KEY_ENC_OPT_ERSPAN_HWID] = { .type = NLA_U8 },
+};
+
static int
tunnel_key_copy_geneve_opt(const struct nlattr *nla, void *dst, int dst_len,
struct netlink_ext_ack *extack)
@@ -151,6 +161,59 @@ tunnel_key_copy_vxlan_opt(const struct nlattr *nla, void *dst, int dst_len,
return sizeof(struct vxlan_metadata);
}
+static int
+tunnel_key_copy_erspan_opt(const struct nlattr *nla, void *dst, int dst_len,
+ struct netlink_ext_ack *extack)
+{
+ struct nlattr *tb[TCA_TUNNEL_KEY_ENC_OPT_ERSPAN_MAX + 1];
+ int err;
+ u8 ver;
+
+ err = nla_parse_nested(tb, TCA_TUNNEL_KEY_ENC_OPT_ERSPAN_MAX, nla,
+ erspan_opt_policy, extack);
+ if (err < 0)
+ return err;
+
+ if (!tb[TCA_TUNNEL_KEY_ENC_OPT_ERSPAN_VER]) {
+ NL_SET_ERR_MSG(extack, "Missing tunnel key erspan option ver");
+ return -EINVAL;
+ }
+
+ ver = nla_get_u8(tb[TCA_TUNNEL_KEY_ENC_OPT_ERSPAN_VER]);
+ if (ver == 1) {
+ if (!tb[TCA_TUNNEL_KEY_ENC_OPT_ERSPAN_INDEX]) {
+ NL_SET_ERR_MSG(extack, "Missing tunnel key erspan option index");
+ return -EINVAL;
+ }
+ } else if (ver == 2) {
+ if (!tb[TCA_TUNNEL_KEY_ENC_OPT_ERSPAN_DIR] ||
+ !tb[TCA_TUNNEL_KEY_ENC_OPT_ERSPAN_HWID]) {
+ NL_SET_ERR_MSG(extack, "Missing tunnel key erspan option dir or hwid");
+ return -EINVAL;
+ }
+ } else {
+ NL_SET_ERR_MSG(extack, "Tunnel key erspan option ver is incorrect");
+ return -EINVAL;
+ }
+
+ if (dst) {
+ struct erspan_metadata *md = dst;
+
+ md->version = ver;
+ if (ver == 1) {
+ nla = tb[TCA_TUNNEL_KEY_ENC_OPT_ERSPAN_INDEX];
+ md->u.index = nla_get_be32(nla);
+ } else {
+ nla = tb[TCA_TUNNEL_KEY_ENC_OPT_ERSPAN_DIR];
+ md->u.md2.dir = nla_get_u8(nla);
+ nla = tb[TCA_TUNNEL_KEY_ENC_OPT_ERSPAN_HWID];
+ set_hwid(&md->u.md2, nla_get_u8(nla));
+ }
+ }
+
+ return sizeof(struct erspan_metadata);
+}
+
static int tunnel_key_copy_opts(const struct nlattr *nla, u8 *dst,
int dst_len, struct netlink_ext_ack *extack)
{
@@ -192,6 +255,18 @@ static int tunnel_key_copy_opts(const struct nlattr *nla, u8 *dst,
opts_len += opt_len;
type = TUNNEL_VXLAN_OPT;
break;
+ case TCA_TUNNEL_KEY_ENC_OPTS_ERSPAN:
+ if (type) {
+ NL_SET_ERR_MSG(extack, "Duplicate type for erspan options");
+ return -EINVAL;
+ }
+ opt_len = tunnel_key_copy_erspan_opt(attr, dst,
+ dst_len, extack);
+ if (opt_len < 0)
+ return opt_len;
+ opts_len += opt_len;
+ type = TUNNEL_ERSPAN_OPT;
+ break;
}
}
@@ -235,6 +310,14 @@ static int tunnel_key_opts_set(struct nlattr *nla, struct ip_tunnel_info *info,
#else
return -EAFNOSUPPORT;
#endif
+ case TCA_TUNNEL_KEY_ENC_OPTS_ERSPAN:
+#if IS_ENABLED(CONFIG_INET)
+ info->key.tun_flags |= TUNNEL_ERSPAN_OPT;
+ return tunnel_key_copy_opts(nla, ip_tunnel_info_opts(info),
+ opts_len, extack);
+#else
+ return -EAFNOSUPPORT;
+#endif
default:
NL_SET_ERR_MSG(extack, "Cannot set tunnel options for unknown tunnel type");
return -EINVAL;
@@ -530,6 +613,37 @@ static int tunnel_key_vxlan_opts_dump(struct sk_buff *skb,
return 0;
}
+static int tunnel_key_erspan_opts_dump(struct sk_buff *skb,
+ const struct ip_tunnel_info *info)
+{
+ struct erspan_metadata *md = (struct erspan_metadata *)(info + 1);
+ struct nlattr *start;
+
+ start = nla_nest_start_noflag(skb, TCA_TUNNEL_KEY_ENC_OPTS_ERSPAN);
+ if (!start)
+ return -EMSGSIZE;
+
+ if (nla_put_u8(skb, TCA_TUNNEL_KEY_ENC_OPT_ERSPAN_VER, md->version))
+ goto err;
+
+ if (md->version == 1 &&
+ nla_put_be32(skb, TCA_TUNNEL_KEY_ENC_OPT_ERSPAN_INDEX, md->u.index))
+ goto err;
+
+ if (md->version == 2 &&
+ (nla_put_u8(skb, TCA_TUNNEL_KEY_ENC_OPT_ERSPAN_DIR,
+ md->u.md2.dir) ||
+ nla_put_u8(skb, TCA_TUNNEL_KEY_ENC_OPT_ERSPAN_HWID,
+ get_hwid(&md->u.md2))))
+ goto err;
+
+ nla_nest_end(skb, start);
+ return 0;
+err:
+ nla_nest_cancel(skb, start);
+ return -EMSGSIZE;
+}
+
static int tunnel_key_opts_dump(struct sk_buff *skb,
const struct ip_tunnel_info *info)
{
@@ -551,6 +665,10 @@ static int tunnel_key_opts_dump(struct sk_buff *skb,
err = tunnel_key_vxlan_opts_dump(skb, info);
if (err)
goto err_out;
+ } else if (info->key.tun_flags & TUNNEL_ERSPAN_OPT) {
+ err = tunnel_key_erspan_opts_dump(skb, info);
+ if (err)
+ goto err_out;
} else {
err_out:
nla_nest_cancel(skb, start);