[RFC 12/13] app/testpmd: support for port mirroring

[Stephen Hemminger <stephen@networkplumber.org>]

Add new commands to enable testing of port mirror functionality.

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
---
 app/test-pmd/cmdline.c                      |   1 +
 app/test-pmd/cmdline_mirror.c               | 120 ++++++++++++++++++++
 app/test-pmd/cmdline_mirror.h               |  12 ++
 app/test-pmd/meson.build                    |   1 +
 doc/guides/testpmd_app_ug/testpmd_funcs.rst |  15 +++
 5 files changed, 149 insertions(+)
 create mode 100644 app/test-pmd/cmdline_mirror.c
 create mode 100644 app/test-pmd/cmdline_mirror.h

diff --git a/app/test-pmd/cmdline.c b/app/test-pmd/cmdline.c
index b4089d281b..64ba094e04 100644
--- a/app/test-pmd/cmdline.c
+++ b/app/test-pmd/cmdline.c
@@ -66,6 +66,7 @@
 #include "testpmd.h"
 #include "cmdline_cman.h"
 #include "cmdline_mtr.h"
+#include "cmdline_mirror.h"
 #include "cmdline_tm.h"
 #include "bpf_cmd.h"
 
diff --git a/app/test-pmd/cmdline_mirror.c b/app/test-pmd/cmdline_mirror.c
new file mode 100644
index 0000000000..cea41302e1
--- /dev/null
+++ b/app/test-pmd/cmdline_mirror.c
@@ -0,0 +1,120 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2025 Stephen Hemminger <stephen@networkplumber.org>
+ */
+
+#include <stdlib.h>
+
+#include <cmdline_parse.h>
+#include <cmdline_parse_num.h>
+#include <cmdline_parse_string.h>
+
+#include <rte_ethdev.h>
+
+#include "testpmd.h"
+#include "cmdline_mirror.h"
+
+/* *** Create Port Mirror Object *** */
+struct cmd_create_port_mirror_result {
+	cmdline_fixed_string_t create;
+	cmdline_fixed_string_t port;
+	cmdline_fixed_string_t mirror;
+	uint16_t port_id;
+	cmdline_fixed_string_t destination;
+	uint16_t target_id;
+};
+
+static cmdline_parse_token_string_t cmd_create_port_mirror_create =
+	TOKEN_STRING_INITIALIZER(struct cmd_create_port_mirror_result, create, "create");
+static cmdline_parse_token_string_t cmd_create_port_mirror_port =
+	TOKEN_STRING_INITIALIZER(struct cmd_create_port_mirror_result, port, "port");
+static cmdline_parse_token_string_t cmd_create_port_mirror_mirror =
+	TOKEN_STRING_INITIALIZER(struct cmd_create_port_mirror_result, mirror, "mirror");
+static cmdline_parse_token_string_t cmd_create_port_mirror_destination =
+	TOKEN_STRING_INITIALIZER(struct cmd_create_port_mirror_result, destination, "destination");
+static cmdline_parse_token_num_t cmd_create_port_mirror_port_id =
+	TOKEN_NUM_INITIALIZER(struct cmd_create_port_mirror_result, port_id, RTE_UINT16);
+static cmdline_parse_token_num_t cmd_create_port_mirror_target_id =
+	TOKEN_NUM_INITIALIZER(struct cmd_create_port_mirror_result, target_id, RTE_UINT16);
+
+static void cmd_create_port_mirror_parsed(void *parsed_result,
+	__rte_unused struct cmdline *cl,
+	__rte_unused void *data)
+{
+	const struct cmd_create_port_mirror_result *res = parsed_result;
+	struct rte_eth_mirror_conf mirror_conf = {
+		.snaplen = RTE_MBUF_DEFAULT_BUF_SIZE,
+		.direction = RTE_MIRROR_DIRECTION_INGRESS | RTE_MIRROR_DIRECTION_EGRESS
+	};
+	int ret;
+
+	if (port_id_is_invalid(res->port_id, ENABLED_WARN))
+		return;
+
+	if (port_id_is_invalid(res->target_id, ENABLED_WARN))
+		return;
+
+	ret = rte_eth_add_mirror(res->port_id, res->target_id, &mirror_conf);
+	if (ret != 0)
+		fprintf(stderr, "%s\n", rte_strerror(-ret));
+}
+
+cmdline_parse_inst_t cmd_create_port_mirror = {
+	.f = cmd_create_port_mirror_parsed,
+	.data = NULL,
+	.help_str = "create port mirror <port_id> destination <port_id>",
+	.tokens = {
+		(void *)&cmd_create_port_mirror_create,
+		(void *)&cmd_create_port_mirror_port,
+		(void *)&cmd_create_port_mirror_mirror,
+		(void *)&cmd_create_port_mirror_port_id,
+		(void *)&cmd_create_port_mirror_destination,
+		(void *)&cmd_create_port_mirror_target_id,
+		NULL
+	},
+};
+
+/* *** Disable Port Mirror Object *** */
+struct cmd_disable_port_mirror_result {
+	cmdline_fixed_string_t disable;
+	cmdline_fixed_string_t port;
+	cmdline_fixed_string_t mirror;
+	uint16_t port_id;
+};
+
+static void cmd_disable_port_mirror_parsed(void *parsed_result,
+	__rte_unused struct cmdline *cl,
+	__rte_unused void *data)
+{
+	const struct cmd_disable_port_mirror_result *res = parsed_result;
+	int ret;
+
+	if (port_id_is_invalid(res->port_id, ENABLED_WARN))
+		return;
+
+	/* Disable Mirror */
+	ret = rte_eth_remove_mirror(res->port_id);
+	if (ret != 0)
+		fprintf(stderr, "%s\n", rte_strerror(-ret));
+}
+
+static cmdline_parse_token_string_t cmd_disable_port_mirror_disable =
+	TOKEN_STRING_INITIALIZER(struct cmd_disable_port_mirror_result, disable, "disable");
+static cmdline_parse_token_string_t cmd_disable_port_mirror_port =
+	TOKEN_STRING_INITIALIZER(struct cmd_disable_port_mirror_result, port, "port");
+static cmdline_parse_token_string_t cmd_disable_port_mirror_mirror =
+	TOKEN_STRING_INITIALIZER(struct cmd_disable_port_mirror_result, mirror, "mirror");
+static cmdline_parse_token_num_t cmd_disable_port_mirror_port_id =
+	TOKEN_NUM_INITIALIZER(struct cmd_disable_port_mirror_result, port_id, RTE_UINT16);
+
+cmdline_parse_inst_t cmd_disable_port_mirror = {
+	.f = cmd_disable_port_mirror_parsed,
+	.data = NULL,
+	.help_str = "disable port mirror <port_id>",
+	.tokens = {
+		(void *)&cmd_disable_port_mirror_disable,
+		(void *)&cmd_disable_port_mirror_port,
+		(void *)&cmd_disable_port_mirror_mirror,
+		(void *)&cmd_disable_port_mirror_port_id,
+		NULL
+	},
+};
diff --git a/app/test-pmd/cmdline_mirror.h b/app/test-pmd/cmdline_mirror.h
new file mode 100644
index 0000000000..23ebe1ed75
--- /dev/null
+++ b/app/test-pmd/cmdline_mirror.h
@@ -0,0 +1,12 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2025 Stephen Hemminger <stephen@networkplumber.org>
+ */
+
+#ifndef _CMDLINE_MIRROR_H_
+#define _CMDLINE_MIRROR_H_
+
+/* Port MIRROR commands */
+extern cmdline_parse_inst_t cmd_create_port_mirror;
+extern cmdline_parse_inst_t cmd_disable_port_mirror;
+
+#endif /* _CMDLINE_MIRROR_H_ */
diff --git a/app/test-pmd/meson.build b/app/test-pmd/meson.build
index 000548c261..f34d80bb5d 100644
--- a/app/test-pmd/meson.build
+++ b/app/test-pmd/meson.build
@@ -9,6 +9,7 @@ sources = files(
         'cmdline_cman.c',
         'cmdline_flow.c',
         'cmdline_mtr.c',
+        'cmdline_mirror.c',
         'cmdline_tm.c',
         'cmd_flex_item.c',
         'config.c',
diff --git a/doc/guides/testpmd_app_ug/testpmd_funcs.rst b/doc/guides/testpmd_app_ug/testpmd_funcs.rst
index eeef49500f..ea94f993fe 100644
--- a/doc/guides/testpmd_app_ug/testpmd_funcs.rst
+++ b/doc/guides/testpmd_app_ug/testpmd_funcs.rst
@@ -2568,6 +2568,21 @@ where:
 * ``clear``: Flag that indicates whether the statistics counters should
   be cleared (i.e. set to zero) immediately after they have been read or not.
 
+create mirror
+-----------
+
+Create a new MIRROR port for an ethernet device::
+
+   testpmd> create port mirror (port_id) destination (port_id)
+
+delete mirror
+-----------
+
+Disable MIRROR port for an ethernet device::
+
+   testpmd> disable port mirror (port_id)
+
+
 Traffic Management
 ------------------
 
-- 
2.47.2