[dpdk-dev] [PATCH v6 6/9] testpmd: new commands to load/unload BPF filters

[Konstantin Ananyev]

Introduce new testpmd commands to load/unload RX/TX BPF-based filters.

Signed-off-by: Konstantin Ananyev <konstantin.ananyev at intel.com>
Acked-by: Ferruh Yigit <ferruh.yigit at intel.com>
---
 app/test-pmd/Makefile           |   1 +
 app/test-pmd/bpf_cmd.c          | 175 ++++++++++++++++++++++++++++++++++++++++
 app/test-pmd/bpf_cmd.h          |  16 ++++
 app/test-pmd/cmdline.c          |   5 ++
 app/test-pmd/meson.build        |   4 +
 lib/librte_bpf/rte_bpf_ethdev.h |  10 +++
 6 files changed, 211 insertions(+)
 create mode 100644 app/test-pmd/bpf_cmd.c
 create mode 100644 app/test-pmd/bpf_cmd.h

diff --git a/app/test-pmd/Makefile b/app/test-pmd/Makefile
index 60ae9b9c1..a5a827bbd 100644
--- a/app/test-pmd/Makefile
+++ b/app/test-pmd/Makefile
@@ -33,6 +33,7 @@ SRCS-y += txonly.c
 SRCS-y += csumonly.c
 SRCS-y += icmpecho.c
 SRCS-$(CONFIG_RTE_LIBRTE_IEEE1588) += ieee1588fwd.c
+SRCS-$(CONFIG_RTE_LIBRTE_BPF) += bpf_cmd.c
 
 ifeq ($(CONFIG_RTE_LIBRTE_PMD_SOFTNIC)$(CONFIG_RTE_LIBRTE_SCHED),yy)
 SRCS-y += tm.c
diff --git a/app/test-pmd/bpf_cmd.c b/app/test-pmd/bpf_cmd.c
new file mode 100644
index 000000000..584fad908
--- /dev/null
+++ b/app/test-pmd/bpf_cmd.c
@@ -0,0 +1,175 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2018 Intel Corporation
+ */
+
+#include <stdio.h>
+#include <rte_mbuf.h>
+#include <rte_ethdev.h>
+#include <rte_flow.h>
+#include <rte_bpf_ethdev.h>
+
+#include <cmdline.h>
+#include <cmdline_parse.h>
+#include <cmdline_parse_num.h>
+#include <cmdline_parse_string.h>
+
+#include "testpmd.h"
+
+static const struct rte_bpf_xsym bpf_xsym[] = {
+	{
+		.name = RTE_STR(stdout),
+		.type = RTE_BPF_XTYPE_VAR,
+		.var = &stdout,
+	},
+	{
+		.name = RTE_STR(rte_pktmbuf_dump),
+		.type = RTE_BPF_XTYPE_FUNC,
+		.func = (void *)rte_pktmbuf_dump,
+	},
+};
+
+/* *** load BPF program *** */
+struct cmd_bpf_ld_result {
+	cmdline_fixed_string_t bpf;
+	cmdline_fixed_string_t dir;
+	uint8_t port;
+	uint16_t queue;
+	cmdline_fixed_string_t op;
+	cmdline_fixed_string_t flags;
+	cmdline_fixed_string_t prm;
+};
+
+static void
+bpf_parse_flags(const char *str, struct rte_bpf_arg *arg, uint32_t *flags)
+{
+	uint32_t i, v;
+
+	*flags = RTE_BPF_ETH_F_NONE;
+	arg->type = RTE_BPF_ARG_PTR;
+	arg->size = mbuf_data_size;
+
+	for (i = 0; str[i] != 0; i++) {
+		v = toupper(str[i]);
+		if (v == 'J')
+			*flags |= RTE_BPF_ETH_F_JIT;
+		else if (v == 'M') {
+			arg->type = RTE_BPF_ARG_PTR_MBUF;
+			arg->size = sizeof(struct rte_mbuf);
+			arg->buf_size = mbuf_data_size;
+		} else if (v == '-')
+			continue;
+		else
+			printf("unknown flag: \'%c\'", v);
+	}
+}
+
+static void cmd_operate_bpf_ld_parsed(void *parsed_result,
+				__attribute__((unused)) struct cmdline *cl,
+				__attribute__((unused)) void *data)
+{
+	int32_t rc;
+	uint32_t flags;
+	struct cmd_bpf_ld_result *res;
+	struct rte_bpf_prm prm;
+	const char *fname, *sname;
+
+	res = parsed_result;
+	memset(&prm, 0, sizeof(prm));
+	prm.xsym = bpf_xsym;
+	prm.nb_xsym = RTE_DIM(bpf_xsym);
+
+	bpf_parse_flags(res->flags, &prm.prog_arg, &flags);
+	fname = res->prm;
+	sname = ".text";
+
+	if (strcmp(res->dir, "rx") == 0) {
+		rc = rte_bpf_eth_rx_elf_load(res->port, res->queue, &prm,
+			fname, sname, flags);
+		printf("%d:%s\n", rc, strerror(-rc));
+	} else if (strcmp(res->dir, "tx") == 0) {
+		rc = rte_bpf_eth_tx_elf_load(res->port, res->queue, &prm,
+			fname, sname, flags);
+		printf("%d:%s\n", rc, strerror(-rc));
+	} else
+		printf("invalid value: %s\n", res->dir);
+}
+
+cmdline_parse_token_string_t cmd_load_bpf_start =
+	TOKEN_STRING_INITIALIZER(struct cmd_bpf_ld_result,
+			bpf, "bpf-load");
+cmdline_parse_token_string_t cmd_load_bpf_dir =
+	TOKEN_STRING_INITIALIZER(struct cmd_bpf_ld_result,
+			dir, "rx#tx");
+cmdline_parse_token_num_t cmd_load_bpf_port =
+	TOKEN_NUM_INITIALIZER(struct cmd_bpf_ld_result, port, UINT8);
+cmdline_parse_token_num_t cmd_load_bpf_queue =
+	TOKEN_NUM_INITIALIZER(struct cmd_bpf_ld_result, queue, UINT16);
+cmdline_parse_token_string_t cmd_load_bpf_flags =
+	TOKEN_STRING_INITIALIZER(struct cmd_bpf_ld_result,
+			flags, NULL);
+cmdline_parse_token_string_t cmd_load_bpf_prm =
+	TOKEN_STRING_INITIALIZER(struct cmd_bpf_ld_result,
+			prm, NULL);
+
+cmdline_parse_inst_t cmd_operate_bpf_ld_parse = {
+	.f = cmd_operate_bpf_ld_parsed,
+	.data = NULL,
+	.help_str = "bpf-load rx|tx <port> <queue> <J|M|B> <file_name>",
+	.tokens = {
+		(void *)&cmd_load_bpf_start,
+		(void *)&cmd_load_bpf_dir,
+		(void *)&cmd_load_bpf_port,
+		(void *)&cmd_load_bpf_queue,
+		(void *)&cmd_load_bpf_flags,
+		(void *)&cmd_load_bpf_prm,
+		NULL,
+	},
+};
+
+/* *** unload BPF program *** */
+struct cmd_bpf_unld_result {
+	cmdline_fixed_string_t bpf;
+	cmdline_fixed_string_t dir;
+	uint8_t port;
+	uint16_t queue;
+};
+
+static void cmd_operate_bpf_unld_parsed(void *parsed_result,
+				__attribute__((unused)) struct cmdline *cl,
+				__attribute__((unused)) void *data)
+{
+	struct cmd_bpf_unld_result *res;
+
+	res = parsed_result;
+
+	if (strcmp(res->dir, "rx") == 0)
+		rte_bpf_eth_rx_unload(res->port, res->queue);
+	else if (strcmp(res->dir, "tx") == 0)
+		rte_bpf_eth_tx_unload(res->port, res->queue);
+	else
+		printf("invalid value: %s\n", res->dir);
+}
+
+cmdline_parse_token_string_t cmd_unload_bpf_start =
+	TOKEN_STRING_INITIALIZER(struct cmd_bpf_unld_result,
+			bpf, "bpf-unload");
+cmdline_parse_token_string_t cmd_unload_bpf_dir =
+	TOKEN_STRING_INITIALIZER(struct cmd_bpf_unld_result,
+			dir, "rx#tx");
+cmdline_parse_token_num_t cmd_unload_bpf_port =
+	TOKEN_NUM_INITIALIZER(struct cmd_bpf_unld_result, port, UINT8);
+cmdline_parse_token_num_t cmd_unload_bpf_queue =
+	TOKEN_NUM_INITIALIZER(struct cmd_bpf_unld_result, queue, UINT16);
+
+cmdline_parse_inst_t cmd_operate_bpf_unld_parse = {
+	.f = cmd_operate_bpf_unld_parsed,
+	.data = NULL,
+	.help_str = "bpf-unload rx|tx <port> <queue>",
+	.tokens = {
+		(void *)&cmd_unload_bpf_start,
+		(void *)&cmd_unload_bpf_dir,
+		(void *)&cmd_unload_bpf_port,
+		(void *)&cmd_unload_bpf_queue,
+		NULL,
+	},
+};
diff --git a/app/test-pmd/bpf_cmd.h b/app/test-pmd/bpf_cmd.h
new file mode 100644
index 000000000..5ee4c9f79
--- /dev/null
+++ b/app/test-pmd/bpf_cmd.h
@@ -0,0 +1,16 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2018 Intel Corporation
+ */
+
+#ifndef _BPF_CMD_H_
+#define _BPF_CMD_H_
+
+#ifdef RTE_LIBRTE_BPF
+
+ /* BPF CLI */
+extern cmdline_parse_inst_t cmd_operate_bpf_ld_parse;
+extern cmdline_parse_inst_t cmd_operate_bpf_unld_parse;
+
+#endif /* RTE_LIBRTE_BPF */
+
+#endif /* _BPF_CMD_H_ */
diff --git a/app/test-pmd/cmdline.c b/app/test-pmd/cmdline.c
index 961567070..5c4bf4e5b 100644
--- a/app/test-pmd/cmdline.c
+++ b/app/test-pmd/cmdline.c
@@ -75,6 +75,7 @@
 #include "testpmd.h"
 #include "cmdline_mtr.h"
 #include "cmdline_tm.h"
+#include "bpf_cmd.h"
 
 static struct cmdline *testpmd_cl;
 
@@ -16695,6 +16696,10 @@ cmdline_parse_ctx_t main_ctx[] = {
 	(cmdline_parse_inst_t *)&cmd_resume_port_tm_node,
 	(cmdline_parse_inst_t *)&cmd_port_tm_hierarchy_commit,
 	(cmdline_parse_inst_t *)&cmd_cfg_tunnel_udp_port,
+#ifdef RTE_LIBRTE_BPF
+	(cmdline_parse_inst_t *)&cmd_operate_bpf_ld_parse,
+	(cmdline_parse_inst_t *)&cmd_operate_bpf_unld_parse,
+#endif
 	NULL,
 };
 
diff --git a/app/test-pmd/meson.build b/app/test-pmd/meson.build
index b47537642..a51514b03 100644
--- a/app/test-pmd/meson.build
+++ b/app/test-pmd/meson.build
@@ -38,3 +38,7 @@ endif
 if dpdk_conf.has('RTE_LIBRTE_DPAA_PMD')
 	deps += ['bus_dpaa', 'mempool_dpaa', 'pmd_dpaa']
 endif
+if dpdk_conf.has('RTE_LIBRTE_BPF')
+	sources += files('bpf_cmd.c')
+	deps += 'bpf'
+endif
diff --git a/lib/librte_bpf/rte_bpf_ethdev.h b/lib/librte_bpf/rte_bpf_ethdev.h
index 4800bbdaa..b4d4d3b16 100644
--- a/lib/librte_bpf/rte_bpf_ethdev.h
+++ b/lib/librte_bpf/rte_bpf_ethdev.h
@@ -69,6 +69,11 @@ void rte_bpf_eth_tx_unload(uint16_t port, uint16_t queue);
  *  Pathname for a ELF file.
  * @param sname
  *  Name of the executable section within the file to load.
+ * @param prm
+ *  Parameters used to create and initialise the BPF exeution context.
+ * @param flags
+ *  Flags that define expected expected behavior of the loaded filter
+ *  (i.e. jited/non-jited version to use).
  * @return
  *   Zero on successful completion or negative error code otherwise.
  */
@@ -88,6 +93,11 @@ int rte_bpf_eth_rx_elf_load(uint16_t port, uint16_t queue,
  *  Pathname for a ELF file.
  * @param sname
  *  Name of the executable section within the file to load.
+ * @param prm
+ *  Parameters used to create and initialise the BPF exeution context.
+ * @param flags
+ *  Flags that define expected expected behavior of the loaded filter
+ *  (i.e. jited/non-jited version to use).
  * @return
  *   Zero on successful completion or negative error code otherwise.
  */
-- 
2.13.6