[PATCH net-next v2 0/3] Add MPLS actions to TC

[PATCH net-next v2 0/3] Add MPLS actions to TC

[John Hurley]

This patchset introduces a new TC action module that allows the
manipulation of the MPLS headers of packets. The code impliments
functionality including push, pop, and modify.

Also included is a update to the IR action preparation code to allow the
new MPLS actions to be offloaded to HW.

v1->v2:
- ensure TCA_ID_MPLS does not conflict with TCA_ID_CTINFO (Davide Caratti)

John Hurley (3):
  net: sched: add mpls manipulation actions to TC
  net: sched: include mpls actions in hardware intermediate
    representation
  selftests: tc-tests: actions: add MPLS tests

 include/net/flow_offload.h                         |  10 +
 include/net/tc_act/tc_mpls.h                       |  91 +++
 include/uapi/linux/pkt_cls.h                       |   3 +-
 include/uapi/linux/tc_act/tc_mpls.h                |  32 +
 net/sched/Kconfig                                  |  11 +
 net/sched/Makefile                                 |   1 +
 net/sched/act_mpls.c                               | 450 +++++++++++++
 net/sched/cls_api.c                                |  26 +
 .../tc-testing/tc-tests/actions/mpls.json          | 744 +++++++++++++++++++++
 9 files changed, 1367 insertions(+), 1 deletion(-)
 create mode 100644 include/net/tc_act/tc_mpls.h
 create mode 100644 include/uapi/linux/tc_act/tc_mpls.h
 create mode 100644 net/sched/act_mpls.c
 create mode 100644 tools/testing/selftests/tc-testing/tc-tests/actions/mpls.json

-- 
2.7.4

[PATCH net-next v2 1/3] net: sched: add mpls manipulation actions to TC

[John Hurley]

Currently, TC offers the ability to match on the MPLS fields of a packet
through the use of the flow_dissector_key_mpls struct. However, as yet, TC
actions do not allow the modification or manipulation of such fields.

Add a new module that registers TC action ops to allow manipulation of
MPLS. This includes the ability to push and pop headers as well as modify
the contents of new or existing headers. A further action to decrement the
TTL field of an MPLS header is also provided.

Signed-off-by: John Hurley <john.hurley@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
---
 include/net/tc_act/tc_mpls.h        |  27 +++
 include/uapi/linux/pkt_cls.h        |   3 +-
 include/uapi/linux/tc_act/tc_mpls.h |  32 +++
 net/sched/Kconfig                   |  11 +
 net/sched/Makefile                  |   1 +
 net/sched/act_mpls.c                | 450 ++++++++++++++++++++++++++++++++++++
 6 files changed, 523 insertions(+), 1 deletion(-)
 create mode 100644 include/net/tc_act/tc_mpls.h
 create mode 100644 include/uapi/linux/tc_act/tc_mpls.h
 create mode 100644 net/sched/act_mpls.c

diff --git a/include/net/tc_act/tc_mpls.h b/include/net/tc_act/tc_mpls.h
new file mode 100644
index 0000000..ca7393a
--- /dev/null
+++ b/include/net/tc_act/tc_mpls.h
@@ -0,0 +1,27 @@
+/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) */
+/* Copyright (C) 2019 Netronome Systems, Inc. */
+
+#ifndef __NET_TC_MPLS_H
+#define __NET_TC_MPLS_H
+
+#include <linux/tc_act/tc_mpls.h>
+#include <net/act_api.h>
+
+struct tcf_mpls_params {
+	int tcfm_action;
+	u32 tcfm_label;
+	u8 tcfm_tc;
+	u8 tcfm_ttl;
+	__be16 tcfm_proto;
+	struct rcu_head	rcu;
+};
+
+#define ACT_MPLS_TC_NOT_SET	0xff
+
+struct tcf_mpls {
+	struct tc_action common;
+	struct tcf_mpls_params __rcu *mpls_p;
+};
+#define to_mpls(a) ((struct tcf_mpls *)a)
+
+#endif /* __NET_TC_MPLS_H */
diff --git a/include/uapi/linux/pkt_cls.h b/include/uapi/linux/pkt_cls.h
index a93680f..fb9804a 100644
--- a/include/uapi/linux/pkt_cls.h
+++ b/include/uapi/linux/pkt_cls.h
@@ -104,8 +104,9 @@ enum tca_id {
 	TCA_ID_SIMP = TCA_ACT_SIMP,
 	TCA_ID_IFE = TCA_ACT_IFE,
 	TCA_ID_SAMPLE = TCA_ACT_SAMPLE,
-	/* other actions go here */
 	TCA_ID_CTINFO,
+	TCA_ID_MPLS,
+	/* other actions go here */
 	__TCA_ID_MAX = 255
 };
 
diff --git a/include/uapi/linux/tc_act/tc_mpls.h b/include/uapi/linux/tc_act/tc_mpls.h
new file mode 100644
index 0000000..6e8907b
--- /dev/null
+++ b/include/uapi/linux/tc_act/tc_mpls.h
@@ -0,0 +1,32 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+/* Copyright (C) 2019 Netronome Systems, Inc. */
+
+#ifndef __LINUX_TC_MPLS_H
+#define __LINUX_TC_MPLS_H
+
+#include <linux/pkt_cls.h>
+
+#define TCA_MPLS_ACT_POP	1
+#define TCA_MPLS_ACT_PUSH	2
+#define TCA_MPLS_ACT_MODIFY	3
+#define TCA_MPLS_ACT_DEC_TTL	4
+
+struct tc_mpls {
+	tc_gen;
+	int m_action;
+};
+
+enum {
+	TCA_MPLS_UNSPEC,
+	TCA_MPLS_TM,
+	TCA_MPLS_PARMS,
+	TCA_MPLS_PAD,
+	TCA_MPLS_PROTO,
+	TCA_MPLS_LABEL,
+	TCA_MPLS_TC,
+	TCA_MPLS_TTL,
+	__TCA_MPLS_MAX,
+};
+#define TCA_MPLS_MAX (__TCA_MPLS_MAX - 1)
+
+#endif
diff --git a/net/sched/Kconfig b/net/sched/Kconfig
index d104f7e..a34dcd3 100644
--- a/net/sched/Kconfig
+++ b/net/sched/Kconfig
@@ -842,6 +842,17 @@ config NET_ACT_CSUM
 	  To compile this code as a module, choose M here: the
 	  module will be called act_csum.
 
+config NET_ACT_MPLS
+	tristate "MPLS manipulation"
+	depends on NET_CLS_ACT
+	help
+	  Say Y here to push or pop MPLS headers.
+
+	  If unsure, say N.
+
+	  To compile this code as a module, choose M here: the
+	  module will be called act_mpls.
+
 config NET_ACT_VLAN
         tristate "Vlan manipulation"
         depends on NET_CLS_ACT
diff --git a/net/sched/Makefile b/net/sched/Makefile
index d54bfcb..c266036 100644
--- a/net/sched/Makefile
+++ b/net/sched/Makefile
@@ -18,6 +18,7 @@ obj-$(CONFIG_NET_ACT_PEDIT)	+= act_pedit.o
 obj-$(CONFIG_NET_ACT_SIMP)	+= act_simple.o
 obj-$(CONFIG_NET_ACT_SKBEDIT)	+= act_skbedit.o
 obj-$(CONFIG_NET_ACT_CSUM)	+= act_csum.o
+obj-$(CONFIG_NET_ACT_MPLS)	+= act_mpls.o
 obj-$(CONFIG_NET_ACT_VLAN)	+= act_vlan.o
 obj-$(CONFIG_NET_ACT_BPF)	+= act_bpf.o
 obj-$(CONFIG_NET_ACT_CONNMARK)	+= act_connmark.o
diff --git a/net/sched/act_mpls.c b/net/sched/act_mpls.c
new file mode 100644
index 0000000..ff56ada
--- /dev/null
+++ b/net/sched/act_mpls.c
@@ -0,0 +1,450 @@
+// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+/* Copyright (C) 2019 Netronome Systems, Inc. */
+
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/mpls.h>
+#include <linux/rtnetlink.h>
+#include <linux/skbuff.h>
+#include <linux/tc_act/tc_mpls.h>
+#include <net/mpls.h>
+#include <net/netlink.h>
+#include <net/pkt_sched.h>
+#include <net/pkt_cls.h>
+#include <net/tc_act/tc_mpls.h>
+
+static unsigned int mpls_net_id;
+static struct tc_action_ops act_mpls_ops;
+
+#define ACT_MPLS_TTL_DEFAULT	255
+
+static void tcf_mpls_mod_lse(struct mpls_shim_hdr *lse,
+			     struct tcf_mpls_params *p, bool set_bos)
+{
+	u32 new_lse = be32_to_cpu(lse->label_stack_entry);
+
+	if (p->tcfm_label) {
+		new_lse &= ~MPLS_LS_LABEL_MASK;
+		new_lse |= p->tcfm_label << MPLS_LS_LABEL_SHIFT;
+	}
+	if (p->tcfm_ttl) {
+		new_lse &= ~MPLS_LS_TTL_MASK;
+		new_lse |= p->tcfm_ttl << MPLS_LS_TTL_SHIFT;
+	}
+	if (p->tcfm_tc != ACT_MPLS_TC_NOT_SET) {
+		new_lse &= ~MPLS_LS_TC_MASK;
+		new_lse |= p->tcfm_tc << MPLS_LS_TC_SHIFT;
+	}
+	if (set_bos)
+		new_lse |= 1 << MPLS_LS_S_SHIFT;
+
+	lse->label_stack_entry = cpu_to_be32(new_lse);
+}
+
+static inline void tcf_mpls_set_eth_type(struct sk_buff *skb, __be16 ethertype)
+{
+	struct ethhdr *hdr = eth_hdr(skb);
+
+	skb_postpull_rcsum(skb, &hdr->h_proto, ETH_TLEN);
+	hdr->h_proto = ethertype;
+	skb_postpush_rcsum(skb, &hdr->h_proto, ETH_TLEN);
+}
+
+static int tcf_mpls_act(struct sk_buff *skb, const struct tc_action *a,
+			struct tcf_result *res)
+{
+	struct tcf_mpls *m = to_mpls(a);
+	struct mpls_shim_hdr *lse;
+	struct tcf_mpls_params *p;
+	u32 temp_lse;
+	int ret;
+	u8 ttl;
+
+	tcf_lastuse_update(&m->tcf_tm);
+	bstats_cpu_update(this_cpu_ptr(m->common.cpu_bstats), skb);
+
+	/* Ensure 'data' points at mac_header prior calling mpls manipulating
+	 * functions.
+	 */
+	if (skb_at_tc_ingress(skb))
+		skb_push_rcsum(skb, skb->mac_len);
+
+	ret = READ_ONCE(m->tcf_action);
+
+	p = rcu_dereference_bh(m->mpls_p);
+
+	switch (p->tcfm_action) {
+	case TCA_MPLS_ACT_POP:
+		if (unlikely(!eth_p_mpls(skb->protocol)))
+			goto out;
+
+		if (unlikely(skb_ensure_writable(skb, ETH_HLEN + MPLS_HLEN)))
+			goto drop;
+
+		skb_postpull_rcsum(skb, mpls_hdr(skb), MPLS_HLEN);
+		memmove(skb->data + MPLS_HLEN, skb->data, ETH_HLEN);
+
+		__skb_pull(skb, MPLS_HLEN);
+		skb_reset_mac_header(skb);
+		skb_set_network_header(skb, ETH_HLEN);
+
+		tcf_mpls_set_eth_type(skb, p->tcfm_proto);
+		skb->protocol = p->tcfm_proto;
+		break;
+	case TCA_MPLS_ACT_PUSH:
+		if (unlikely(skb_cow_head(skb, MPLS_HLEN)))
+			goto drop;
+
+		skb_push(skb, MPLS_HLEN);
+		memmove(skb->data, skb->data + MPLS_HLEN, ETH_HLEN);
+		skb_reset_mac_header(skb);
+		skb_set_network_header(skb, ETH_HLEN);
+
+		lse = mpls_hdr(skb);
+		lse->label_stack_entry = 0;
+		tcf_mpls_mod_lse(lse, p, !eth_p_mpls(skb->protocol));
+		skb_postpush_rcsum(skb, lse, MPLS_HLEN);
+
+		tcf_mpls_set_eth_type(skb, p->tcfm_proto);
+		skb->protocol = p->tcfm_proto;
+		break;
+	case TCA_MPLS_ACT_MODIFY:
+		if (unlikely(!eth_p_mpls(skb->protocol)))
+			goto out;
+
+		if (unlikely(skb_ensure_writable(skb, ETH_HLEN + MPLS_HLEN)))
+			goto drop;
+
+		lse = mpls_hdr(skb);
+		skb_postpull_rcsum(skb, lse, MPLS_HLEN);
+		tcf_mpls_mod_lse(lse, p, false);
+		skb_postpush_rcsum(skb, lse, MPLS_HLEN);
+		break;
+	case TCA_MPLS_ACT_DEC_TTL:
+		if (unlikely(!eth_p_mpls(skb->protocol)))
+			goto out;
+
+		if (unlikely(skb_ensure_writable(skb, ETH_HLEN + MPLS_HLEN)))
+			goto drop;
+
+		lse = mpls_hdr(skb);
+		temp_lse = be32_to_cpu(lse->label_stack_entry);
+		ttl = (temp_lse & MPLS_LS_TTL_MASK) >> MPLS_LS_TTL_SHIFT;
+		if (!--ttl)
+			goto drop;
+
+		temp_lse &= ~MPLS_LS_TTL_MASK;
+		temp_lse |= ttl << MPLS_LS_TTL_SHIFT;
+		skb_postpull_rcsum(skb, lse, MPLS_HLEN);
+		lse->label_stack_entry = cpu_to_be32(temp_lse);
+		skb_postpush_rcsum(skb, lse, MPLS_HLEN);
+		break;
+	default:
+		WARN_ONCE(1, "Invalid MPLS action\n");
+	}
+
+out:
+	if (skb_at_tc_ingress(skb))
+		skb_pull_rcsum(skb, skb->mac_len);
+
+	return ret;
+
+drop:
+	qstats_drop_inc(this_cpu_ptr(m->common.cpu_qstats));
+	return TC_ACT_SHOT;
+}
+
+static int valid_label(const struct nlattr *attr,
+		       struct netlink_ext_ack *extack)
+{
+	const u32 *label = nla_data(attr);
+
+	if (!*label || *label & ~MPLS_LABEL_MASK) {
+		NL_SET_ERR_MSG_MOD(extack, "MPLS label out of range");
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static const struct nla_policy mpls_policy[TCA_MPLS_MAX + 1] = {
+	[TCA_MPLS_PARMS]	= NLA_POLICY_EXACT_LEN(sizeof(struct tc_mpls)),
+	[TCA_MPLS_PROTO]	= { .type = NLA_U16 },
+	[TCA_MPLS_LABEL]	= NLA_POLICY_VALIDATE_FN(NLA_U32, valid_label),
+	[TCA_MPLS_TC]		= NLA_POLICY_RANGE(NLA_U8, 0, 7),
+	[TCA_MPLS_TTL]		= NLA_POLICY_MIN(NLA_U8, 1),
+};
+
+static int tcf_mpls_init(struct net *net, struct nlattr *nla,
+			 struct nlattr *est, struct tc_action **a,
+			 int ovr, int bind, bool rtnl_held,
+			 struct tcf_proto *tp, struct netlink_ext_ack *extack)
+{
+	struct tc_action_net *tn = net_generic(net, mpls_net_id);
+	struct nlattr *tb[TCA_MPLS_MAX + 1];
+	struct tcf_chain *goto_ch = NULL;
+	struct tcf_mpls_params *p;
+	struct tc_mpls *parm;
+	bool exists = false;
+	struct tcf_mpls *m;
+	int ret = 0, err;
+	u8 mpls_ttl = 0;
+
+	if (!nla) {
+		NL_SET_ERR_MSG_MOD(extack, "missing netlink attributes");
+		return -EINVAL;
+	}
+
+	err = nla_parse_nested(tb, TCA_MPLS_MAX, nla, mpls_policy, extack);
+	if (err < 0)
+		return err;
+
+	if (!tb[TCA_MPLS_PARMS]) {
+		NL_SET_ERR_MSG_MOD(extack, "no MPLS params");
+		return -EINVAL;
+	}
+	parm = nla_data(tb[TCA_MPLS_PARMS]);
+
+	/* Verify parameters against action type. */
+	switch (parm->m_action) {
+	case TCA_MPLS_ACT_POP:
+		if (!tb[TCA_MPLS_PROTO] ||
+		    !eth_proto_is_802_3(nla_get_be16(tb[TCA_MPLS_PROTO]))) {
+			NL_SET_ERR_MSG_MOD(extack, "MPLS POP: invalid proto");
+			return -EINVAL;
+		}
+		if (tb[TCA_MPLS_LABEL] || tb[TCA_MPLS_TTL] || tb[TCA_MPLS_TC]) {
+			NL_SET_ERR_MSG_MOD(extack,
+					   "MPLS POP: unsupported attrs");
+			return -EINVAL;
+		}
+		break;
+	case TCA_MPLS_ACT_DEC_TTL:
+		if (tb[TCA_MPLS_PROTO] || tb[TCA_MPLS_LABEL] ||
+		    tb[TCA_MPLS_TTL] || tb[TCA_MPLS_TC]) {
+			NL_SET_ERR_MSG_MOD(extack,
+					   "MPLS DEC TTL: unsupported attrs");
+			return -EINVAL;
+		}
+		break;
+	case TCA_MPLS_ACT_PUSH:
+		if (!tb[TCA_MPLS_LABEL]) {
+			NL_SET_ERR_MSG_MOD(extack, "MPLS PUSH: missing label");
+			return -EINVAL;
+		}
+		if (tb[TCA_MPLS_PROTO] &&
+		    !eth_p_mpls(nla_get_be16(tb[TCA_MPLS_PROTO]))) {
+			NL_SET_ERR_MSG_MOD(extack, "MPLS PUSH: invalid proto");
+			return -EPROTONOSUPPORT;
+		}
+		/* Push needs a TTL - if not specified, set a default value. */
+		if (!tb[TCA_MPLS_TTL]) {
+#if IS_ENABLED(CONFIG_MPLS)
+			mpls_ttl = net->mpls.default_ttl ?
+				   net->mpls.default_ttl : ACT_MPLS_TTL_DEFAULT;
+#else
+			mpls_ttl = ACT_MPLS_TTL_DEFAULT;
+#endif
+		}
+		break;
+	case TCA_MPLS_ACT_MODIFY:
+		if (tb[TCA_MPLS_PROTO]) {
+			NL_SET_ERR_MSG_MOD(extack,
+					   "MPLS MOD: unsupported attrs");
+			return -EINVAL;
+		}
+		break;
+	default:
+		NL_SET_ERR_MSG_MOD(extack, "MPLS: unknown action");
+		return -EINVAL;
+	}
+
+	err = tcf_idr_check_alloc(tn, &parm->index, a, bind);
+	if (err < 0)
+		return err;
+	exists = err;
+	if (exists && bind)
+		return 0;
+
+	if (!exists) {
+		ret = tcf_idr_create(tn, parm->index, est, a,
+				     &act_mpls_ops, bind, true);
+		if (ret) {
+			tcf_idr_cleanup(tn, parm->index);
+			return ret;
+		}
+
+		ret = ACT_P_CREATED;
+	} else if (!ovr) {
+		tcf_idr_release(*a, bind);
+		return -EEXIST;
+	}
+
+	err = tcf_action_check_ctrlact(parm->action, tp, &goto_ch, extack);
+	if (err < 0)
+		goto release_idr;
+
+	m = to_mpls(*a);
+
+	p = kzalloc(sizeof(*p), GFP_KERNEL);
+	if (!p) {
+		err = -ENOMEM;
+		goto put_chain;
+	}
+
+	p->tcfm_action = parm->m_action;
+	p->tcfm_label = tb[TCA_MPLS_LABEL] ? nla_get_u32(tb[TCA_MPLS_LABEL]) :
+					     0;
+	p->tcfm_tc = tb[TCA_MPLS_TC] ? nla_get_u8(tb[TCA_MPLS_TC]) :
+				       ACT_MPLS_TC_NOT_SET;
+	p->tcfm_ttl = tb[TCA_MPLS_TTL] ? nla_get_u8(tb[TCA_MPLS_TTL]) :
+					 mpls_ttl;
+	p->tcfm_proto = tb[TCA_MPLS_PROTO] ? nla_get_be16(tb[TCA_MPLS_PROTO]) :
+					     htons(ETH_P_MPLS_UC);
+
+	spin_lock_bh(&m->tcf_lock);
+	goto_ch = tcf_action_set_ctrlact(*a, parm->action, goto_ch);
+	rcu_swap_protected(m->mpls_p, p, lockdep_is_held(&m->tcf_lock));
+	spin_unlock_bh(&m->tcf_lock);
+
+	if (goto_ch)
+		tcf_chain_put_by_act(goto_ch);
+	if (p)
+		kfree_rcu(p, rcu);
+
+	if (ret == ACT_P_CREATED)
+		tcf_idr_insert(tn, *a);
+	return ret;
+put_chain:
+	if (goto_ch)
+		tcf_chain_put_by_act(goto_ch);
+release_idr:
+	tcf_idr_release(*a, bind);
+	return err;
+}
+
+static void tcf_mpls_cleanup(struct tc_action *a)
+{
+	struct tcf_mpls *m = to_mpls(a);
+	struct tcf_mpls_params *p;
+
+	p = rcu_dereference_protected(m->mpls_p, 1);
+	if (p)
+		kfree_rcu(p, rcu);
+}
+
+static int tcf_mpls_dump(struct sk_buff *skb, struct tc_action *a,
+			 int bind, int ref)
+{
+	unsigned char *b = skb_tail_pointer(skb);
+	struct tcf_mpls *m = to_mpls(a);
+	struct tcf_mpls_params *p;
+	struct tc_mpls opt = {
+		.index    = m->tcf_index,
+		.refcnt   = refcount_read(&m->tcf_refcnt) - ref,
+		.bindcnt  = atomic_read(&m->tcf_bindcnt) - bind,
+	};
+	struct tcf_t t;
+
+	spin_lock_bh(&m->tcf_lock);
+	opt.action = m->tcf_action;
+	p = rcu_dereference_protected(m->mpls_p, lockdep_is_held(&m->tcf_lock));
+	opt.m_action = p->tcfm_action;
+
+	if (nla_put(skb, TCA_MPLS_PARMS, sizeof(opt), &opt))
+		goto nla_put_failure;
+
+	if (p->tcfm_label && nla_put_u32(skb, TCA_MPLS_LABEL, p->tcfm_label))
+		goto nla_put_failure;
+
+	if (p->tcfm_tc != ACT_MPLS_TC_NOT_SET &&
+	    nla_put_u8(skb, TCA_MPLS_TC, p->tcfm_tc))
+		goto nla_put_failure;
+
+	if (p->tcfm_ttl && nla_put_u8(skb, TCA_MPLS_TTL, p->tcfm_ttl))
+		goto nla_put_failure;
+
+	if (nla_put_be16(skb, TCA_MPLS_PROTO, p->tcfm_proto))
+		goto nla_put_failure;
+
+	tcf_tm_dump(&t, &m->tcf_tm);
+
+	if (nla_put_64bit(skb, TCA_MPLS_TM, sizeof(t), &t, TCA_MPLS_PAD))
+		goto nla_put_failure;
+
+	spin_unlock_bh(&m->tcf_lock);
+
+	return skb->len;
+
+nla_put_failure:
+	spin_unlock_bh(&m->tcf_lock);
+	nlmsg_trim(skb, b);
+	return -EMSGSIZE;
+}
+
+static int tcf_mpls_walker(struct net *net, struct sk_buff *skb,
+			   struct netlink_callback *cb, int type,
+			   const struct tc_action_ops *ops,
+			   struct netlink_ext_ack *extack)
+{
+	struct tc_action_net *tn = net_generic(net, mpls_net_id);
+
+	return tcf_generic_walker(tn, skb, cb, type, ops, extack);
+}
+
+static int tcf_mpls_search(struct net *net, struct tc_action **a, u32 index)
+{
+	struct tc_action_net *tn = net_generic(net, mpls_net_id);
+
+	return tcf_idr_search(tn, a, index);
+}
+
+static struct tc_action_ops act_mpls_ops = {
+	.kind		=	"mpls",
+	.id		=	TCA_ID_MPLS,
+	.owner		=	THIS_MODULE,
+	.act		=	tcf_mpls_act,
+	.dump		=	tcf_mpls_dump,
+	.init		=	tcf_mpls_init,
+	.cleanup	=	tcf_mpls_cleanup,
+	.walk		=	tcf_mpls_walker,
+	.lookup		=	tcf_mpls_search,
+	.size		=	sizeof(struct tcf_mpls),
+};
+
+static __net_init int mpls_init_net(struct net *net)
+{
+	struct tc_action_net *tn = net_generic(net, mpls_net_id);
+
+	return tc_action_net_init(tn, &act_mpls_ops);
+}
+
+static void __net_exit mpls_exit_net(struct list_head *net_list)
+{
+	tc_action_net_exit(net_list, mpls_net_id);
+}
+
+static struct pernet_operations mpls_net_ops = {
+	.init = mpls_init_net,
+	.exit_batch = mpls_exit_net,
+	.id   = &mpls_net_id,
+	.size = sizeof(struct tc_action_net),
+};
+
+static int __init mpls_init_module(void)
+{
+	return tcf_register_action(&act_mpls_ops, &mpls_net_ops);
+}
+
+static void __exit mpls_cleanup_module(void)
+{
+	tcf_unregister_action(&act_mpls_ops, &mpls_net_ops);
+}
+
+module_init(mpls_init_module);
+module_exit(mpls_cleanup_module);
+
+MODULE_AUTHOR("Netronome Systems <oss-drivers@netronome.com>");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("MPLS manipulation actions");
-- 
2.7.4

Re: [PATCH net-next v2 1/3] net: sched: add mpls manipulation actions to TC

[Jiri Pirko]

Thu, Jun 13, 2019 at 07:43:57PM CEST, john.hurley@netronome.com wrote:
>Currently, TC offers the ability to match on the MPLS fields of a packet
>through the use of the flow_dissector_key_mpls struct. However, as yet, TC
>actions do not allow the modification or manipulation of such fields.
>
>Add a new module that registers TC action ops to allow manipulation of
>MPLS. This includes the ability to push and pop headers as well as modify
>the contents of new or existing headers. A further action to decrement the
>TTL field of an MPLS header is also provided.
>
>Signed-off-by: John Hurley <john.hurley@netronome.com>
>Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>

[...]


>+		if (tb[TCA_MPLS_LABEL] || tb[TCA_MPLS_TTL] || tb[TCA_MPLS_TC]) {
>+			NL_SET_ERR_MSG_MOD(extack,
>+					   "MPLS POP: unsupported attrs");

No need to break line here and couple other similar places in this code.
Anyway, looks good otherwise:

Acked-by: Jiri Pirko <jiri@mellanox.com>

[...]

Re: [PATCH net-next v2 1/3] net: sched: add mpls manipulation actions to TC

[John Hurley]

On Fri, Jun 14, 2019 at 9:10 AM Jiri Pirko <jiri@resnulli.us> wrote:
>
> Thu, Jun 13, 2019 at 07:43:57PM CEST, john.hurley@netronome.com wrote:
> >Currently, TC offers the ability to match on the MPLS fields of a packet
> >through the use of the flow_dissector_key_mpls struct. However, as yet, TC
> >actions do not allow the modification or manipulation of such fields.
> >
> >Add a new module that registers TC action ops to allow manipulation of
> >MPLS. This includes the ability to push and pop headers as well as modify
> >the contents of new or existing headers. A further action to decrement the
> >TTL field of an MPLS header is also provided.
> >
> >Signed-off-by: John Hurley <john.hurley@netronome.com>
> >Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
>
> [...]
>
>
> >+              if (tb[TCA_MPLS_LABEL] || tb[TCA_MPLS_TTL] || tb[TCA_MPLS_TC]) {
> >+                      NL_SET_ERR_MSG_MOD(extack,
> >+                                         "MPLS POP: unsupported attrs");
>
> No need to break line here and couple other similar places in this code.
> Anyway, looks good otherwise:
>

Ok, let me respin with these line breaks removed.
I'll also retract patch 2 and repost when driver changes are there.
Thanks


> Acked-by: Jiri Pirko <jiri@mellanox.com>
>
> [...]

Re: [PATCH net-next v2 1/3] net: sched: add mpls manipulation actions to TC

[Cong Wang]

On Thu, Jun 13, 2019 at 10:44 AM John Hurley <john.hurley@netronome.com> wrote:
> +static inline void tcf_mpls_set_eth_type(struct sk_buff *skb, __be16 ethertype)
> +{
> +       struct ethhdr *hdr = eth_hdr(skb);
> +
> +       skb_postpull_rcsum(skb, &hdr->h_proto, ETH_TLEN);
> +       hdr->h_proto = ethertype;
> +       skb_postpush_rcsum(skb, &hdr->h_proto, ETH_TLEN);

So you just want to adjust the checksum with the new ->h_proto
value. please use a right csum API, rather than skb_post*_rcsum().


> +}
> +
> +static int tcf_mpls_act(struct sk_buff *skb, const struct tc_action *a,
> +                       struct tcf_result *res)
> +{
> +       struct tcf_mpls *m = to_mpls(a);
> +       struct mpls_shim_hdr *lse;
> +       struct tcf_mpls_params *p;
> +       u32 temp_lse;
> +       int ret;
> +       u8 ttl;
> +
> +       tcf_lastuse_update(&m->tcf_tm);
> +       bstats_cpu_update(this_cpu_ptr(m->common.cpu_bstats), skb);
> +
> +       /* Ensure 'data' points at mac_header prior calling mpls manipulating
> +        * functions.
> +        */
> +       if (skb_at_tc_ingress(skb))
> +               skb_push_rcsum(skb, skb->mac_len);
> +
> +       ret = READ_ONCE(m->tcf_action);
> +
> +       p = rcu_dereference_bh(m->mpls_p);
> +
> +       switch (p->tcfm_action) {
> +       case TCA_MPLS_ACT_POP:
> +               if (unlikely(!eth_p_mpls(skb->protocol)))
> +                       goto out;
> +
> +               if (unlikely(skb_ensure_writable(skb, ETH_HLEN + MPLS_HLEN)))
> +                       goto drop;
> +
> +               skb_postpull_rcsum(skb, mpls_hdr(skb), MPLS_HLEN);
> +               memmove(skb->data + MPLS_HLEN, skb->data, ETH_HLEN);
> +
> +               __skb_pull(skb, MPLS_HLEN);
> +               skb_reset_mac_header(skb);
> +               skb_set_network_header(skb, ETH_HLEN);
> +
> +               tcf_mpls_set_eth_type(skb, p->tcfm_proto);
> +               skb->protocol = p->tcfm_proto;
> +               break;
> +       case TCA_MPLS_ACT_PUSH:
> +               if (unlikely(skb_cow_head(skb, MPLS_HLEN)))
> +                       goto drop;
> +
> +               skb_push(skb, MPLS_HLEN);
> +               memmove(skb->data, skb->data + MPLS_HLEN, ETH_HLEN);
> +               skb_reset_mac_header(skb);
> +               skb_set_network_header(skb, ETH_HLEN);
> +
> +               lse = mpls_hdr(skb);
> +               lse->label_stack_entry = 0;
> +               tcf_mpls_mod_lse(lse, p, !eth_p_mpls(skb->protocol));
> +               skb_postpush_rcsum(skb, lse, MPLS_HLEN);
> +
> +               tcf_mpls_set_eth_type(skb, p->tcfm_proto);
> +               skb->protocol = p->tcfm_proto;
> +               break;

Is it possible to refactor and reuse the similar code in
net/openvswitch/actions.c::pop_mpls()/push_mpls()?



> +       case TCA_MPLS_ACT_MODIFY:
> +               if (unlikely(!eth_p_mpls(skb->protocol)))
> +                       goto out;
> +
> +               if (unlikely(skb_ensure_writable(skb, ETH_HLEN + MPLS_HLEN)))
> +                       goto drop;
> +
> +               lse = mpls_hdr(skb);
> +               skb_postpull_rcsum(skb, lse, MPLS_HLEN);
> +               tcf_mpls_mod_lse(lse, p, false);
> +               skb_postpush_rcsum(skb, lse, MPLS_HLEN);
> +               break;
> +       case TCA_MPLS_ACT_DEC_TTL:
> +               if (unlikely(!eth_p_mpls(skb->protocol)))
> +                       goto out;
> +
> +               if (unlikely(skb_ensure_writable(skb, ETH_HLEN + MPLS_HLEN)))
> +                       goto drop;
> +
> +               lse = mpls_hdr(skb);
> +               temp_lse = be32_to_cpu(lse->label_stack_entry);
> +               ttl = (temp_lse & MPLS_LS_TTL_MASK) >> MPLS_LS_TTL_SHIFT;
> +               if (!--ttl)
> +                       goto drop;
> +
> +               temp_lse &= ~MPLS_LS_TTL_MASK;
> +               temp_lse |= ttl << MPLS_LS_TTL_SHIFT;
> +               skb_postpull_rcsum(skb, lse, MPLS_HLEN);
> +               lse->label_stack_entry = cpu_to_be32(temp_lse);
> +               skb_postpush_rcsum(skb, lse, MPLS_HLEN);
> +               break;
> +       default:
> +               WARN_ONCE(1, "Invalid MPLS action\n");


This warning is not necessary, it must be validated in ->init().


> +       }
> +
> +out:
> +       if (skb_at_tc_ingress(skb))
> +               skb_pull_rcsum(skb, skb->mac_len);
> +
> +       return ret;
> +
> +drop:
> +       qstats_drop_inc(this_cpu_ptr(m->common.cpu_qstats));
> +       return TC_ACT_SHOT;
> +}


Thanks.

Re: [PATCH net-next v2 1/3] net: sched: add mpls manipulation actions to TC

[John Hurley]

On Fri, Jun 14, 2019 at 5:59 PM Cong Wang <xiyou.wangcong@gmail.com> wrote:
>
> On Thu, Jun 13, 2019 at 10:44 AM John Hurley <john.hurley@netronome.com> wrote:
> > +static inline void tcf_mpls_set_eth_type(struct sk_buff *skb, __be16 ethertype)
> > +{
> > +       struct ethhdr *hdr = eth_hdr(skb);
> > +
> > +       skb_postpull_rcsum(skb, &hdr->h_proto, ETH_TLEN);
> > +       hdr->h_proto = ethertype;
> > +       skb_postpush_rcsum(skb, &hdr->h_proto, ETH_TLEN);
>
> So you just want to adjust the checksum with the new ->h_proto
> value. please use a right csum API, rather than skb_post*_rcsum().
>

Hi Cong,
Yes, I'm trying to maintain the checksum value if checksum complete
has been set.
The function above pulls the old eth type out of the checksum value
(if it is checksum complete), updates the eth type, and pushes the new
eth type into the checksum.
This passes my tests on the checksum.
I couldn't see an appropriate function to do this other than
recalculating the whole thing.
Maybe I missed something?

>
> > +}
> > +
> > +static int tcf_mpls_act(struct sk_buff *skb, const struct tc_action *a,
> > +                       struct tcf_result *res)
> > +{
> > +       struct tcf_mpls *m = to_mpls(a);
> > +       struct mpls_shim_hdr *lse;
> > +       struct tcf_mpls_params *p;
> > +       u32 temp_lse;
> > +       int ret;
> > +       u8 ttl;
> > +
> > +       tcf_lastuse_update(&m->tcf_tm);
> > +       bstats_cpu_update(this_cpu_ptr(m->common.cpu_bstats), skb);
> > +
> > +       /* Ensure 'data' points at mac_header prior calling mpls manipulating
> > +        * functions.
> > +        */
> > +       if (skb_at_tc_ingress(skb))
> > +               skb_push_rcsum(skb, skb->mac_len);
> > +
> > +       ret = READ_ONCE(m->tcf_action);
> > +
> > +       p = rcu_dereference_bh(m->mpls_p);
> > +
> > +       switch (p->tcfm_action) {
> > +       case TCA_MPLS_ACT_POP:
> > +               if (unlikely(!eth_p_mpls(skb->protocol)))
> > +                       goto out;
> > +
> > +               if (unlikely(skb_ensure_writable(skb, ETH_HLEN + MPLS_HLEN)))
> > +                       goto drop;
> > +
> > +               skb_postpull_rcsum(skb, mpls_hdr(skb), MPLS_HLEN);
> > +               memmove(skb->data + MPLS_HLEN, skb->data, ETH_HLEN);
> > +
> > +               __skb_pull(skb, MPLS_HLEN);
> > +               skb_reset_mac_header(skb);
> > +               skb_set_network_header(skb, ETH_HLEN);
> > +
> > +               tcf_mpls_set_eth_type(skb, p->tcfm_proto);
> > +               skb->protocol = p->tcfm_proto;
> > +               break;
> > +       case TCA_MPLS_ACT_PUSH:
> > +               if (unlikely(skb_cow_head(skb, MPLS_HLEN)))
> > +                       goto drop;
> > +
> > +               skb_push(skb, MPLS_HLEN);
> > +               memmove(skb->data, skb->data + MPLS_HLEN, ETH_HLEN);
> > +               skb_reset_mac_header(skb);
> > +               skb_set_network_header(skb, ETH_HLEN);
> > +
> > +               lse = mpls_hdr(skb);
> > +               lse->label_stack_entry = 0;
> > +               tcf_mpls_mod_lse(lse, p, !eth_p_mpls(skb->protocol));
> > +               skb_postpush_rcsum(skb, lse, MPLS_HLEN);
> > +
> > +               tcf_mpls_set_eth_type(skb, p->tcfm_proto);
> > +               skb->protocol = p->tcfm_proto;
> > +               break;
>
> Is it possible to refactor and reuse the similar code in
> net/openvswitch/actions.c::pop_mpls()/push_mpls()?
>

This is something I would need to look into

>
>
> > +       case TCA_MPLS_ACT_MODIFY:
> > +               if (unlikely(!eth_p_mpls(skb->protocol)))
> > +                       goto out;
> > +
> > +               if (unlikely(skb_ensure_writable(skb, ETH_HLEN + MPLS_HLEN)))
> > +                       goto drop;
> > +
> > +               lse = mpls_hdr(skb);
> > +               skb_postpull_rcsum(skb, lse, MPLS_HLEN);
> > +               tcf_mpls_mod_lse(lse, p, false);
> > +               skb_postpush_rcsum(skb, lse, MPLS_HLEN);
> > +               break;
> > +       case TCA_MPLS_ACT_DEC_TTL:
> > +               if (unlikely(!eth_p_mpls(skb->protocol)))
> > +                       goto out;
> > +
> > +               if (unlikely(skb_ensure_writable(skb, ETH_HLEN + MPLS_HLEN)))
> > +                       goto drop;
> > +
> > +               lse = mpls_hdr(skb);
> > +               temp_lse = be32_to_cpu(lse->label_stack_entry);
> > +               ttl = (temp_lse & MPLS_LS_TTL_MASK) >> MPLS_LS_TTL_SHIFT;
> > +               if (!--ttl)
> > +                       goto drop;
> > +
> > +               temp_lse &= ~MPLS_LS_TTL_MASK;
> > +               temp_lse |= ttl << MPLS_LS_TTL_SHIFT;
> > +               skb_postpull_rcsum(skb, lse, MPLS_HLEN);
> > +               lse->label_stack_entry = cpu_to_be32(temp_lse);
> > +               skb_postpush_rcsum(skb, lse, MPLS_HLEN);
> > +               break;
> > +       default:
> > +               WARN_ONCE(1, "Invalid MPLS action\n");
>
>
> This warning is not necessary, it must be validated in ->init().
>

ack.
Thanks for comments

>
> > +       }
> > +
> > +out:
> > +       if (skb_at_tc_ingress(skb))
> > +               skb_pull_rcsum(skb, skb->mac_len);
> > +
> > +       return ret;
> > +
> > +drop:
> > +       qstats_drop_inc(this_cpu_ptr(m->common.cpu_qstats));
> > +       return TC_ACT_SHOT;
> > +}
>
>
> Thanks.

Re: [PATCH net-next v2 1/3] net: sched: add mpls manipulation actions to TC

[Cong Wang]

On Fri, Jun 14, 2019 at 3:56 PM John Hurley <john.hurley@netronome.com> wrote:
>
> On Fri, Jun 14, 2019 at 5:59 PM Cong Wang <xiyou.wangcong@gmail.com> wrote:
> >
> > On Thu, Jun 13, 2019 at 10:44 AM John Hurley <john.hurley@netronome.com> wrote:
> > > +static inline void tcf_mpls_set_eth_type(struct sk_buff *skb, __be16 ethertype)
> > > +{
> > > +       struct ethhdr *hdr = eth_hdr(skb);
> > > +
> > > +       skb_postpull_rcsum(skb, &hdr->h_proto, ETH_TLEN);
> > > +       hdr->h_proto = ethertype;
> > > +       skb_postpush_rcsum(skb, &hdr->h_proto, ETH_TLEN);
> >
> > So you just want to adjust the checksum with the new ->h_proto
> > value. please use a right csum API, rather than skb_post*_rcsum().
> >
>
> Hi Cong,
> Yes, I'm trying to maintain the checksum value if checksum complete
> has been set.
> The function above pulls the old eth type out of the checksum value
> (if it is checksum complete), updates the eth type, and pushes the new
> eth type into the checksum.
> This passes my tests on the checksum.
> I couldn't see an appropriate function to do this other than
> recalculating the whole thing.
> Maybe I missed something?

I never say it is wrong, I mean to say using a csum API is more
clear. Please look into checksum API's, there are many options
for different scenarios, there must be one serves your purpose.

Thanks.

Re: [PATCH net-next v2 1/3] net: sched: add mpls manipulation actions to TC

[John Hurley]

On Mon, Jun 17, 2019 at 10:18 PM Cong Wang <xiyou.wangcong@gmail.com> wrote:
>
> On Fri, Jun 14, 2019 at 3:56 PM John Hurley <john.hurley@netronome.com> wrote:
> >
> > On Fri, Jun 14, 2019 at 5:59 PM Cong Wang <xiyou.wangcong@gmail.com> wrote:
> > >
> > > On Thu, Jun 13, 2019 at 10:44 AM John Hurley <john.hurley@netronome.com> wrote:
> > > > +static inline void tcf_mpls_set_eth_type(struct sk_buff *skb, __be16 ethertype)
> > > > +{
> > > > +       struct ethhdr *hdr = eth_hdr(skb);
> > > > +
> > > > +       skb_postpull_rcsum(skb, &hdr->h_proto, ETH_TLEN);
> > > > +       hdr->h_proto = ethertype;
> > > > +       skb_postpush_rcsum(skb, &hdr->h_proto, ETH_TLEN);
> > >
> > > So you just want to adjust the checksum with the new ->h_proto
> > > value. please use a right csum API, rather than skb_post*_rcsum().
> > >
> >
> > Hi Cong,
> > Yes, I'm trying to maintain the checksum value if checksum complete
> > has been set.
> > The function above pulls the old eth type out of the checksum value
> > (if it is checksum complete), updates the eth type, and pushes the new
> > eth type into the checksum.
> > This passes my tests on the checksum.
> > I couldn't see an appropriate function to do this other than
> > recalculating the whole thing.
> > Maybe I missed something?
>
> I never say it is wrong, I mean to say using a csum API is more
> clear. Please look into checksum API's, there are many options
> for different scenarios, there must be one serves your purpose.
>

Ok, I'll have another look here and see if I can get something more appropriate.
Thanks

> Thanks.

[PATCH net-next v2 2/3] net: sched: include mpls actions in hardware intermediate representation

[John Hurley]

A recent addition to TC actions is the ability to manipulate the MPLS
headers on packets.

In preparation to offload such actions to hardware, update the IR code to
accept and prepare the new actions.

Signed-off-by: John Hurley <john.hurley@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
---
 include/net/flow_offload.h   | 10 +++++++
 include/net/tc_act/tc_mpls.h | 64 ++++++++++++++++++++++++++++++++++++++++++++
 net/sched/cls_api.c          | 26 ++++++++++++++++++
 3 files changed, 100 insertions(+)

diff --git a/include/net/flow_offload.h b/include/net/flow_offload.h
index 36fdb85..e26ae81 100644
--- a/include/net/flow_offload.h
+++ b/include/net/flow_offload.h
@@ -123,6 +123,10 @@ enum flow_action_id {
 	FLOW_ACTION_QUEUE,
 	FLOW_ACTION_SAMPLE,
 	FLOW_ACTION_POLICE,
+	FLOW_ACTION_MPLS_PUSH,
+	FLOW_ACTION_MPLS_POP,
+	FLOW_ACTION_MPLS_MANGLE,
+	FLOW_ACTION_MPLS_DEC_TTL,
 };
 
 /* This is mirroring enum pedit_header_type definition for easy mapping between
@@ -172,6 +176,12 @@ struct flow_action_entry {
 			s64			burst;
 			u64			rate_bytes_ps;
 		} police;
+		struct {				/* FLOW_ACTION_MPLS */
+			u32		label;
+			__be16		proto;
+			u8		tc;
+			u8		ttl;
+		} mpls;
 	};
 };
 
diff --git a/include/net/tc_act/tc_mpls.h b/include/net/tc_act/tc_mpls.h
index ca7393a..4320de9 100644
--- a/include/net/tc_act/tc_mpls.h
+++ b/include/net/tc_act/tc_mpls.h
@@ -24,4 +24,68 @@ struct tcf_mpls {
 };
 #define to_mpls(a) ((struct tcf_mpls *)a)
 
+static inline bool is_tcf_mpls(const struct tc_action *a)
+{
+#ifdef CONFIG_NET_CLS_ACT
+	if (a->ops && a->ops->id == TCA_ID_MPLS)
+		return true;
+#endif
+	return false;
+}
+
+static inline u32 tcf_mpls_action(const struct tc_action *a)
+{
+	u32 tcfm_action;
+
+	rcu_read_lock();
+	tcfm_action = rcu_dereference(to_mpls(a)->mpls_p)->tcfm_action;
+	rcu_read_unlock();
+
+	return tcfm_action;
+}
+
+static inline u32 tcf_mpls_label(const struct tc_action *a)
+{
+	u32 tcfm_label;
+
+	rcu_read_lock();
+	tcfm_label = rcu_dereference(to_mpls(a)->mpls_p)->tcfm_label;
+	rcu_read_unlock();
+
+	return tcfm_label;
+}
+
+static inline u8 tcf_mpls_tc(const struct tc_action *a)
+{
+	u8 tcfm_tc;
+
+	rcu_read_lock();
+	tcfm_tc = rcu_dereference(to_mpls(a)->mpls_p)->tcfm_tc;
+	rcu_read_unlock();
+
+	return tcfm_tc;
+}
+
+static inline u8 tcf_mpls_ttl(const struct tc_action *a)
+{
+	u8 tcfm_ttl;
+
+	rcu_read_lock();
+	tcfm_ttl = rcu_dereference(to_mpls(a)->mpls_p)->tcfm_ttl;
+	rcu_read_unlock();
+
+	return tcfm_ttl;
+}
+
+static inline __be16 tcf_mpls_proto(const struct tc_action *a)
+{
+	__be16 tcfm_proto;
+
+	rcu_read_lock();
+	tcfm_proto = rcu_dereference(to_mpls(a)->mpls_p)->tcfm_proto;
+	rcu_read_unlock();
+
+	return tcfm_proto;
+}
+
 #endif /* __NET_TC_MPLS_H */
diff --git a/net/sched/cls_api.c b/net/sched/cls_api.c
index ad36bbc..dd65e21 100644
--- a/net/sched/cls_api.c
+++ b/net/sched/cls_api.c
@@ -35,6 +35,7 @@
 #include <net/tc_act/tc_police.h>
 #include <net/tc_act/tc_sample.h>
 #include <net/tc_act/tc_skbedit.h>
+#include <net/tc_act/tc_mpls.h>
 
 extern const struct nla_policy rtm_tca_policy[TCA_MAX + 1];
 
@@ -3266,6 +3267,31 @@ int tc_setup_flow_action(struct flow_action *flow_action,
 			entry->police.burst = tcf_police_tcfp_burst(act);
 			entry->police.rate_bytes_ps =
 				tcf_police_rate_bytes_ps(act);
+		} else if (is_tcf_mpls(act)) {
+			switch (tcf_mpls_action(act)) {
+			case TCA_MPLS_ACT_PUSH:
+				entry->id = FLOW_ACTION_MPLS_PUSH;
+				entry->mpls.label = tcf_mpls_label(act);
+				entry->mpls.proto = tcf_mpls_proto(act);
+				entry->mpls.tc = tcf_mpls_tc(act);
+				entry->mpls.ttl = tcf_mpls_ttl(act);
+				break;
+			case TCA_MPLS_ACT_POP:
+				entry->id = FLOW_ACTION_MPLS_POP;
+				entry->mpls.proto = tcf_mpls_proto(act);
+				break;
+			case TCA_MPLS_ACT_MODIFY:
+				entry->id = FLOW_ACTION_MPLS_MANGLE;
+				entry->mpls.label = tcf_mpls_label(act);
+				entry->mpls.tc = tcf_mpls_tc(act);
+				entry->mpls.ttl = tcf_mpls_ttl(act);
+				break;
+			case TCA_MPLS_ACT_DEC_TTL:
+				entry->id = FLOW_ACTION_MPLS_DEC_TTL;
+				break;
+			default:
+				goto err_out;
+			}
 		} else {
 			goto err_out;
 		}
-- 
2.7.4

Re: [PATCH net-next v2 2/3] net: sched: include mpls actions in hardware intermediate representation

[Jiri Pirko]

Thu, Jun 13, 2019 at 07:43:58PM CEST, john.hurley@netronome.com wrote:
>A recent addition to TC actions is the ability to manipulate the MPLS
>headers on packets.
>
>In preparation to offload such actions to hardware, update the IR code to
>accept and prepare the new actions.
>
>Signed-off-by: John Hurley <john.hurley@netronome.com>
>Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
>---
> include/net/flow_offload.h   | 10 +++++++
> include/net/tc_act/tc_mpls.h | 64 ++++++++++++++++++++++++++++++++++++++++++++
> net/sched/cls_api.c          | 26 ++++++++++++++++++
> 3 files changed, 100 insertions(+)
>
>diff --git a/include/net/flow_offload.h b/include/net/flow_offload.h
>index 36fdb85..e26ae81 100644
>--- a/include/net/flow_offload.h
>+++ b/include/net/flow_offload.h
>@@ -123,6 +123,10 @@ enum flow_action_id {
> 	FLOW_ACTION_QUEUE,
> 	FLOW_ACTION_SAMPLE,
> 	FLOW_ACTION_POLICE,
>+	FLOW_ACTION_MPLS_PUSH,
>+	FLOW_ACTION_MPLS_POP,
>+	FLOW_ACTION_MPLS_MANGLE,
>+	FLOW_ACTION_MPLS_DEC_TTL,
> };
> 
> /* This is mirroring enum pedit_header_type definition for easy mapping between
>@@ -172,6 +176,12 @@ struct flow_action_entry {
> 			s64			burst;
> 			u64			rate_bytes_ps;
> 		} police;
>+		struct {				/* FLOW_ACTION_MPLS */
>+			u32		label;
>+			__be16		proto;
>+			u8		tc;
>+			u8		ttl;
>+		} mpls;


This patch is not really useful without a driver offloading this...

[...]

[PATCH net-next v2 3/3] selftests: tc-tests: actions: add MPLS tests

[John Hurley]

Add a new series of selftests to verify the functionality of act_mpls in
TC.

Signed-off-by: John Hurley <john.hurley@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
---
 .../tc-testing/tc-tests/actions/mpls.json          | 744 +++++++++++++++++++++
 1 file changed, 744 insertions(+)
 create mode 100644 tools/testing/selftests/tc-testing/tc-tests/actions/mpls.json

diff --git a/tools/testing/selftests/tc-testing/tc-tests/actions/mpls.json b/tools/testing/selftests/tc-testing/tc-tests/actions/mpls.json
new file mode 100644
index 0000000..e1a14f4e0
--- /dev/null
+++ b/tools/testing/selftests/tc-testing/tc-tests/actions/mpls.json
@@ -0,0 +1,744 @@
+[
+    {
+        "id": "a933",
+        "name": "Add MPLS dec_ttl action with pipe opcode",
+        "category": [
+            "actions",
+            "mpls"
+        ],
+        "setup": [
+            [
+                "$TC actions flush action mpls",
+                0,
+                1,
+                255
+            ]
+        ],
+        "cmdUnderTest": "$TC actions add action mpls dec_ttl pipe index 8",
+        "expExitCode": "0",
+        "verifyCmd": "$TC actions list action mpls",
+        "matchPattern": "action order [0-9]+: mpls.*dec_ttl.*pipe.*index 8 ref",
+        "matchCount": "1",
+        "teardown": [
+            "$TC actions flush action mpls"
+        ]
+    },
+    {
+        "id": "08d1",
+        "name": "Add mpls dec_ttl action with pass opcode",
+        "category": [
+            "actions",
+            "mpls"
+        ],
+        "setup": [
+            [
+                "$TC actions flush action mpls",
+                0,
+                1,
+                255
+            ]
+        ],
+        "cmdUnderTest": "$TC actions add action mpls dec_ttl pass index 8",
+        "expExitCode": "0",
+        "verifyCmd": "$TC actions get action mpls index 8",
+        "matchPattern": "action order [0-9]+: mpls.*dec_ttl.*pass.*index 8 ref",
+        "matchCount": "1",
+        "teardown": [
+            "$TC actions flush action mpls"
+        ]
+    },
+    {
+        "id": "d786",
+        "name": "Add mpls dec_ttl action with drop opcode",
+        "category": [
+            "actions",
+            "mpls"
+        ],
+        "setup": [
+            [
+                "$TC actions flush action mpls",
+                0,
+                1,
+                255
+            ]
+        ],
+        "cmdUnderTest": "$TC actions add action mpls dec_ttl drop index 8",
+        "expExitCode": "0",
+        "verifyCmd": "$TC actions get action mpls index 8",
+        "matchPattern": "action order [0-9]+: mpls.*dec_ttl.*drop.*index 8 ref",
+        "matchCount": "1",
+        "teardown": [
+            "$TC actions flush action mpls"
+        ]
+    },
+    {
+        "id": "f334",
+        "name": "Add mpls dec_ttl action with reclassify opcode",
+        "category": [
+            "actions",
+            "mpls"
+        ],
+        "setup": [
+            [
+                "$TC actions flush action mpls",
+                0,
+                1,
+                255
+            ]
+        ],
+        "cmdUnderTest": "$TC actions add action mpls dec_ttl reclassify index 8",
+        "expExitCode": "0",
+        "verifyCmd": "$TC actions get action mpls index 8",
+        "matchPattern": "action order [0-9]+: mpls.*dec_ttl.*reclassify.*index 8 ref",
+        "matchCount": "1",
+        "teardown": [
+            "$TC actions flush action mpls"
+        ]
+    },
+    {
+        "id": "29bd",
+        "name": "Add mpls dec_ttl action with continue opcode",
+        "category": [
+            "actions",
+            "mpls"
+        ],
+        "setup": [
+            [
+                "$TC actions flush action mpls",
+                0,
+                1,
+                255
+            ]
+        ],
+        "cmdUnderTest": "$TC actions add action mpls dec_ttl continue index 8",
+        "expExitCode": "0",
+        "verifyCmd": "$TC actions get action mpls index 8",
+        "matchPattern": "action order [0-9]+: mpls.*dec_ttl.*continue.*index 8 ref",
+        "matchCount": "1",
+        "teardown": [
+            "$TC actions flush action mpls"
+        ]
+    },
+    {
+        "id": "48df",
+        "name": "Add mpls dec_ttl action with jump opcode",
+        "category": [
+            "actions",
+            "mpls"
+        ],
+        "setup": [
+            [
+                "$TC actions flush action mpls",
+                0,
+                1,
+                255
+            ]
+        ],
+        "cmdUnderTest": "$TC actions add action mpls dec_ttl jump 10 index 8",
+        "expExitCode": "0",
+        "verifyCmd": "$TC actions list action mpls",
+        "matchPattern": "action order [0-9]+: mpls.*jump 10.*index 8 ref",
+        "matchCount": "1",
+        "teardown": [
+            "$TC actions flush action mpls"
+        ]
+    },
+    {
+        "id": "62eb",
+        "name": "Add mpls dec_ttl action with trap opcode",
+        "category": [
+            "actions",
+            "mpls"
+        ],
+        "setup": [
+            [
+                "$TC actions flush action mpls",
+                0,
+                1,
+                255
+            ]
+        ],
+        "cmdUnderTest": "$TC actions add action mpls dec_ttl trap index 8",
+        "expExitCode": "0",
+        "verifyCmd": "$TC actions list action mpls",
+        "matchPattern": "action order [0-9]+: mpls.*dec_ttl trap.*index 8 ref",
+        "matchCount": "1",
+        "teardown": [
+            "$TC actions flush action mpls"
+        ]
+    },
+    {
+        "id": "9118",
+        "name": "Add mpls dec_ttl action with invalid opcode",
+        "category": [
+            "actions",
+            "mpls"
+        ],
+        "setup": [
+            [
+                "$TC actions flush action mpls",
+                0,
+                1,
+                255
+            ]
+        ],
+        "cmdUnderTest": "$TC actions add action mpls dec_ttl foo index 8",
+        "expExitCode": "255",
+        "verifyCmd": "$TC actions list action mpls",
+        "matchPattern": "action order [0-9]+: mpls.*dec_ttl.*foo.*index 8 ref",
+        "matchCount": "0",
+        "teardown": []
+    },
+    {
+        "id": "6ce1",
+        "name": "Add mpls dec_ttl action with label (invalid)",
+        "category": [
+            "actions",
+            "mpls"
+        ],
+        "setup": [
+            [
+                "$TC actions flush action mpls",
+                0,
+                1,
+                255
+            ]
+        ],
+        "cmdUnderTest": "$TC actions add action mpls dec_ttl label 20",
+        "expExitCode": "255",
+        "verifyCmd": "$TC actions list action mpls",
+        "matchPattern": "action order [0-9]+: mpls.*dec_ttl.*label.*20.*pipe",
+        "matchCount": "0",
+        "teardown": []
+    },
+    {
+        "id": "352f",
+        "name": "Add mpls dec_ttl action with tc (invalid)",
+        "category": [
+            "actions",
+            "mpls"
+        ],
+        "setup": [
+            [
+                "$TC actions flush action mpls",
+                0,
+                1,
+                255
+            ]
+        ],
+        "cmdUnderTest": "$TC actions add action mpls dec_ttl tc 3",
+        "expExitCode": "255",
+        "verifyCmd": "$TC actions list action mpls",
+        "matchPattern": "action order [0-9]+: mpls.*dec_ttl.*tc.*3.*pipe",
+        "matchCount": "0",
+        "teardown": []
+    },
+    {
+        "id": "fa1c",
+        "name": "Add mpls dec_ttl action with ttl (invalid)",
+        "category": [
+            "actions",
+            "mpls"
+        ],
+        "setup": [
+            [
+                "$TC actions flush action mpls",
+                0,
+                1,
+                255
+            ]
+        ],
+        "cmdUnderTest": "$TC actions add action mpls dec_ttl ttl 20",
+        "expExitCode": "255",
+        "verifyCmd": "$TC actions list action mpls",
+        "matchPattern": "action order [0-9]+: mpls.*dec_ttl.*ttl.*20.*pipe",
+        "matchCount": "0",
+        "teardown": []
+    },
+    {
+        "id": "d4c4",
+        "name": "Add mpls pop action with ip proto",
+        "category": [
+            "actions",
+            "mpls"
+        ],
+        "setup": [
+            [
+                "$TC actions flush action mpls",
+                0,
+                1,
+                255
+            ]
+        ],
+        "cmdUnderTest": "$TC actions add action mpls pop protocol ipv4",
+        "expExitCode": "0",
+        "verifyCmd": "$TC actions list action mpls",
+        "matchPattern": "action order [0-9]+: mpls.*pop.*protocol.*ip.*pipe",
+        "matchCount": "1",
+        "teardown": [
+            "$TC actions flush action mpls"
+        ]
+    },
+    {
+        "id": "92fe",
+        "name": "Add mpls pop action with mpls proto",
+        "category": [
+            "actions",
+            "mpls"
+        ],
+        "setup": [
+            [
+                "$TC actions flush action mpls",
+                0,
+                1,
+                255
+            ]
+        ],
+        "cmdUnderTest": "$TC actions add action mpls pop protocol mpls_mc",
+        "expExitCode": "0",
+        "verifyCmd": "$TC actions list action mpls",
+        "matchPattern": "action order [0-9]+: mpls.*pop.*protocol.*mpls_mc.*pipe",
+        "matchCount": "1",
+        "teardown": [
+            "$TC actions flush action mpls"
+        ]
+    },
+    {
+        "id": "7e23",
+        "name": "Add mpls pop action with no protocol (invalid)",
+        "category": [
+            "actions",
+            "mpls"
+        ],
+        "setup": [
+            [
+                "$TC actions flush action mpls",
+                0,
+                1,
+                255
+            ]
+        ],
+        "cmdUnderTest": "$TC actions add action mpls pop",
+        "expExitCode": "255",
+        "verifyCmd": "$TC actions list action mpls",
+        "matchPattern": "action order [0-9]+: mpls.*pop.*pipe",
+        "matchCount": "0",
+        "teardown": []
+    },
+    {
+        "id": "6182",
+        "name": "Add mpls pop action with label (invalid)",
+        "category": [
+            "actions",
+            "mpls"
+        ],
+        "setup": [
+            [
+                "$TC actions flush action mpls",
+                0,
+                1,
+                255
+            ]
+        ],
+        "cmdUnderTest": "$TC actions add action mpls pop protocol ipv4 label 20",
+        "expExitCode": "255",
+        "verifyCmd": "$TC actions list action mpls",
+        "matchPattern": "action order [0-9]+: mpls.*pop.*label.*20.*pipe",
+        "matchCount": "0",
+        "teardown": []
+    },
+    {
+        "id": "6475",
+        "name": "Add mpls pop action with tc (invalid)",
+        "category": [
+            "actions",
+            "mpls"
+        ],
+        "setup": [
+            [
+                "$TC actions flush action mpls",
+                0,
+                1,
+                255
+            ]
+        ],
+        "cmdUnderTest": "$TC actions add action mpls pop protocol ipv4 tc 3",
+        "expExitCode": "255",
+        "verifyCmd": "$TC actions list action mpls",
+        "matchPattern": "action order [0-9]+: mpls.*pop.*tc.*3.*pipe",
+        "matchCount": "0",
+        "teardown": []
+    },
+    {
+        "id": "067b",
+        "name": "Add mpls pop action with ttl (invalid)",
+        "category": [
+            "actions",
+            "mpls"
+        ],
+        "setup": [
+            [
+                "$TC actions flush action mpls",
+                0,
+                1,
+                255
+            ]
+        ],
+        "cmdUnderTest": "$TC actions add action mpls pop protocol ipv4 ttl 20",
+        "expExitCode": "255",
+        "verifyCmd": "$TC actions list action mpls",
+        "matchPattern": "action order [0-9]+: mpls.*pop.*ttl.*20.*pipe",
+        "matchCount": "0",
+        "teardown": []
+    },
+    {
+        "id": "38cc",
+        "name": "Add mpls push action with label",
+        "category": [
+            "actions",
+            "mpls"
+        ],
+        "setup": [
+            [
+                "$TC actions flush action mpls",
+                0,
+                1,
+                255
+            ]
+        ],
+        "cmdUnderTest": "$TC actions add action mpls push label 20",
+        "expExitCode": "0",
+        "verifyCmd": "$TC actions list action mpls",
+        "matchPattern": "action order [0-9]+: mpls.*push.*protocol.*mpls_uc.*label.*20.*ttl.*[0-9]+.*pipe",
+        "matchCount": "1",
+        "teardown": [
+            "$TC actions flush action mpls"
+        ]
+    },
+    {
+        "id": "c281",
+        "name": "Add mpls push action with mpls_mc protocol",
+        "category": [
+            "actions",
+            "mpls"
+        ],
+        "setup": [
+            [
+                "$TC actions flush action mpls",
+                0,
+                1,
+                255
+            ]
+        ],
+        "cmdUnderTest": "$TC actions add action mpls push protocol mpls_mc label 20",
+        "expExitCode": "0",
+        "verifyCmd": "$TC actions list action mpls",
+        "matchPattern": "action order [0-9]+: mpls.*push.*protocol.*mpls_mc.*label.*20.*ttl.*[0-9]+.*pipe",
+        "matchCount": "1",
+        "teardown": [
+            "$TC actions flush action mpls"
+        ]
+    },
+    {
+        "id": "5db4",
+        "name": "Add mpls push action with label, tc and ttl",
+        "category": [
+            "actions",
+            "mpls"
+        ],
+        "setup": [
+            [
+                "$TC actions flush action mpls",
+                0,
+                1,
+                255
+            ]
+        ],
+        "cmdUnderTest": "$TC actions add action mpls push label 20 tc 3 ttl 128",
+        "expExitCode": "0",
+        "verifyCmd": "$TC actions list action mpls",
+        "matchPattern": "action order [0-9]+: mpls.*push.*protocol.*mpls_uc.*label.*20.*tc.*3.*ttl.*128.*pipe",
+        "matchCount": "1",
+        "teardown": [
+            "$TC actions flush action mpls"
+        ]
+    },
+    {
+        "id": "d69d",
+        "name": "Add mpls push action with no label (invalid)",
+        "category": [
+            "actions",
+            "mpls"
+        ],
+        "setup": [
+            [
+                "$TC actions flush action mpls",
+                0,
+                1,
+                255
+            ]
+        ],
+        "cmdUnderTest": "$TC actions add action mpls push",
+        "expExitCode": "255",
+        "verifyCmd": "$TC actions list action mpls",
+        "matchPattern": "action order [0-9]+: mpls.*push.*protocol.*mpls_uc.*pipe",
+        "matchCount": "0",
+        "teardown": []
+    },
+    {
+        "id": "e8e4",
+        "name": "Add mpls push action with ipv4 protocol (invalid)",
+        "category": [
+            "actions",
+            "mpls"
+        ],
+        "setup": [
+            [
+                "$TC actions flush action mpls",
+                0,
+                1,
+                255
+            ]
+        ],
+        "cmdUnderTest": "$TC actions add action mpls push protocol ipv4 label 20",
+        "expExitCode": "255",
+        "verifyCmd": "$TC actions list action mpls",
+        "matchPattern": "action order [0-9]+: mpls.*push.*protocol.*mpls_uc.*label.*20.*ttl.*[0-9]+.*pipe",
+        "matchCount": "0",
+        "teardown": []
+    },
+    {
+        "id": "ecd0",
+        "name": "Add mpls push action with out of range label (invalid)",
+        "category": [
+            "actions",
+            "mpls"
+        ],
+        "setup": [
+            [
+                "$TC actions flush action mpls",
+                0,
+                1,
+                255
+            ]
+        ],
+        "cmdUnderTest": "$TC actions add action mpls push label 1048576",
+        "expExitCode": "255",
+        "verifyCmd": "$TC actions list action mpls",
+        "matchPattern": "action order [0-9]+: mpls.*push.*protocol.*mpls_uc.*label.*1048576.*pipe",
+        "matchCount": "0",
+        "teardown": []
+    },
+    {
+        "id": "d303",
+        "name": "Add mpls push action with out of range tc (invalid)",
+        "category": [
+            "actions",
+            "mpls"
+        ],
+        "setup": [
+            [
+                "$TC actions flush action mpls",
+                0,
+                1,
+                255
+            ]
+        ],
+        "cmdUnderTest": "$TC actions add action mpls push label 20 tc 8",
+        "expExitCode": "255",
+        "verifyCmd": "$TC actions list action mpls",
+        "matchPattern": "action order [0-9]+: mpls.*push.*protocol.*mpls_uc.*label.*20.*tc.*8.*pipe",
+        "matchCount": "0",
+        "teardown": []
+    },
+    {
+        "id": "fd6e",
+        "name": "Add mpls push action with ttl of 0 (invalid)",
+        "category": [
+            "actions",
+            "mpls"
+        ],
+        "setup": [
+            [
+                "$TC actions flush action mpls",
+                0,
+                1,
+                255
+            ]
+        ],
+        "cmdUnderTest": "$TC actions add action mpls push label 20 ttl 0",
+        "expExitCode": "255",
+        "verifyCmd": "$TC actions list action mpls",
+        "matchPattern": "action order [0-9]+: mpls.*push.*protocol.*mpls_uc.*label.*20.*ttl.*0.*pipe",
+        "matchCount": "0",
+        "teardown": []
+    },
+    {
+        "id": "19e9",
+        "name": "Add mpls mod action with mpls label",
+        "category": [
+            "actions",
+            "mpls"
+        ],
+        "setup": [
+            [
+                "$TC actions flush action mpls",
+                0,
+                1,
+                255
+            ]
+        ],
+        "cmdUnderTest": "$TC actions add action mpls mod label 20",
+        "expExitCode": "0",
+        "verifyCmd": "$TC actions list action mpls",
+        "matchPattern": "action order [0-9]+: mpls.*modify.*label.*20.*pipe",
+        "matchCount": "1",
+        "teardown": [
+            "$TC actions flush action mpls"
+        ]
+    },
+    {
+        "id": "04b5",
+        "name": "Add mpls mod action with mpls tc",
+        "category": [
+            "actions",
+            "mpls"
+        ],
+        "setup": [
+            [
+                "$TC actions flush action mpls",
+                0,
+                1,
+                255
+            ]
+        ],
+        "cmdUnderTest": "$TC actions add action mpls mod tc 3",
+        "expExitCode": "0",
+        "verifyCmd": "$TC actions list action mpls",
+        "matchPattern": "action order [0-9]+: mpls.*modify.*tc.*3.*pipe",
+        "matchCount": "1",
+        "teardown": [
+            "$TC actions flush action mpls"
+        ]
+    },
+    {
+        "id": "6ed5",
+        "name": "Add mpls mod action with mpls label",
+        "category": [
+            "actions",
+            "mpls"
+        ],
+        "setup": [
+            [
+                "$TC actions flush action mpls",
+                0,
+                1,
+                255
+            ]
+        ],
+        "cmdUnderTest": "$TC actions add action mpls mod ttl 128",
+        "expExitCode": "0",
+        "verifyCmd": "$TC actions list action mpls",
+        "matchPattern": "action order [0-9]+: mpls.*modify.*ttl.*128.*pipe",
+        "matchCount": "1",
+        "teardown": [
+            "$TC actions flush action mpls"
+        ]
+    },
+    {
+        "id": "db7c",
+        "name": "Add mpls mod action with protocol (invalid)",
+        "category": [
+            "actions",
+            "mpls"
+        ],
+        "setup": [
+            [
+                "$TC actions flush action mpls",
+                0,
+                1,
+                255
+            ]
+        ],
+        "cmdUnderTest": "$TC actions add action mpls mod protocol ipv4",
+        "expExitCode": "255",
+        "verifyCmd": "$TC actions list action mpls",
+        "matchPattern": "action order [0-9]+: mpls.*modify.*protocol.*ip.*pipe",
+        "matchCount": "0",
+        "teardown": []
+    },
+    {
+        "id": "b070",
+        "name": "Replace existing mpls push action with new ID",
+        "category": [
+            "actions",
+            "mpls"
+        ],
+        "setup": [
+            [
+                "$TC actions flush action mpls",
+                0,
+                1,
+                255
+            ],
+            "$TC actions add action mpls push label 20 pipe index 12"
+        ],
+        "cmdUnderTest": "$TC actions replace action mpls push label 30 pipe index 12",
+        "expExitCode": "0",
+        "verifyCmd": "$TC actions get action mpls index 12",
+        "matchPattern": "action order [0-9]+: mpls.*push.*protocol.*mpls_uc.*label.*30.*pipe.*index 12 ref",
+        "matchCount": "1",
+        "teardown": [
+            "$TC actions flush action mpls"
+        ]
+    },
+    {
+        "id": "6cce",
+        "name": "Delete mpls pop action",
+        "category": [
+            "actions",
+            "mpls"
+        ],
+        "setup": [
+            [
+                "$TC actions flush action mpls",
+                0,
+                1,
+                255
+            ],
+            "$TC actions add action mpls pop protocol ipv4 index 44"
+        ],
+        "cmdUnderTest": "$TC actions del action mpls index 44",
+        "expExitCode": "0",
+        "verifyCmd": "$TC actions list action mpls",
+        "matchPattern": "action order [0-9]+: mpls.*pop.*index 44 ref",
+        "matchCount": "0",
+        "teardown": []
+    },
+    {
+        "id": "d138",
+        "name": "Flush mpls actions",
+        "category": [
+            "actions",
+            "mpls"
+        ],
+        "setup": [
+            [
+                "$TC actions flush action mpls",
+                0,
+                1,
+                255
+            ],
+            "$TC actions add action mpls push label 10 index 10",
+            "$TC actions add action mpls push label 20 index 20",
+            "$TC actions add action mpls push label 30 index 30",
+            "$TC actions add action mpls push label 40 index 40"
+        ],
+        "cmdUnderTest": "$TC actions flush action mpls",
+        "expExitCode": "0",
+        "verifyCmd": "$TC actions list action mpls",
+        "matchPattern": "action order [0-9]+: mpls.*push.*",
+        "matchCount": "0",
+        "teardown": []
+    }
+]
-- 
2.7.4