diff mbox series

[bpf-next,1/7] selftests: bpf: break up test_progs

Message ID 20190228010156.82981-1-sdf@google.com
State Changes Requested
Delegated to: BPF Maintainers
Headers show
Series [bpf-next,1/7] selftests: bpf: break up test_progs | expand

Commit Message

Stanislav Fomichev Feb. 28, 2019, 1:01 a.m. UTC 
Recently we had linux-next bpf/bpf-next conflict when we added new
functionality to the test_progs.c at the same location. Let's split
test_progs.c the same way we recently split test_verifier.c.

I follow the same patten we did in commit 2dfb40121ee8 ("selftests: bpf:
prepare for break up of verifier tests") for verifier: create
scaffolding to support dedicated files and slowly move the tests into
separate files.

Compared to the verifier split, each separate file here is
a compilation unit.

Signed-off-by: Stanislav Fomichev <sdf@google.com>
---
 tools/testing/selftests/bpf/Makefile          | 27 +++++-
 .../selftests/bpf/prog_tests/.gitignore       |  1 +
 tools/testing/selftests/bpf/test_progs.c      | 92 +++----------------
 tools/testing/selftests/bpf/test_progs.h      | 81 ++++++++++++++++
 4 files changed, 122 insertions(+), 79 deletions(-)
 create mode 100644 tools/testing/selftests/bpf/prog_tests/.gitignore
 create mode 100644 tools/testing/selftests/bpf/test_progs.h

Comments

Song Liu Feb. 28, 2019, 8 p.m. UTC | #1 
On Wed, Feb 27, 2019 at 5:02 PM Stanislav Fomichev <sdf@google.com> wrote:
>
> Recently we had linux-next bpf/bpf-next conflict when we added new
> functionality to the test_progs.c at the same location. Let's split
> test_progs.c the same way we recently split test_verifier.c.
>
> I follow the same patten we did in commit 2dfb40121ee8 ("selftests: bpf:
> prepare for break up of verifier tests") for verifier: create
> scaffolding to support dedicated files and slowly move the tests into
> separate files.
>
> Compared to the verifier split, each separate file here is
> a compilation unit.

Please move most of the change log above to a cover letter. In this change log,
please explain how each file in prog_tests/*.c should be structured; and how
they are handled by the Makefile.

Thanks,
Song

>
> Signed-off-by: Stanislav Fomichev <sdf@google.com>
> ---
>  tools/testing/selftests/bpf/Makefile          | 27 +++++-
>  .../selftests/bpf/prog_tests/.gitignore       |  1 +
>  tools/testing/selftests/bpf/test_progs.c      | 92 +++----------------
>  tools/testing/selftests/bpf/test_progs.h      | 81 ++++++++++++++++
>  4 files changed, 122 insertions(+), 79 deletions(-)
>  create mode 100644 tools/testing/selftests/bpf/prog_tests/.gitignore
>  create mode 100644 tools/testing/selftests/bpf/test_progs.h
>
> diff --git a/tools/testing/selftests/bpf/Makefile b/tools/testing/selftests/bpf/Makefile
> index ccffaa0a0787..518cd587cd63 100644
> --- a/tools/testing/selftests/bpf/Makefile
> +++ b/tools/testing/selftests/bpf/Makefile
> @@ -165,7 +165,11 @@ $(ALU32_BUILD_DIR)/urandom_read: $(OUTPUT)/urandom_read
>  $(ALU32_BUILD_DIR)/test_progs_32: test_progs.c $(ALU32_BUILD_DIR) \
>                                                 $(ALU32_BUILD_DIR)/urandom_read
>         $(CC) $(CFLAGS) -o $(ALU32_BUILD_DIR)/test_progs_32 $< \
> -               trace_helpers.c $(OUTPUT)/libbpf.a $(LDLIBS)
> +               trace_helpers.c prog_tests/*.c $(OUTPUT)/libbpf.a $(LDLIBS)
> +
> +$(ALU32_BUILD_DIR)/test_progs_32: $(PROG_TESTS_H)
> +$(ALU32_BUILD_DIR)/test_progs_32: CFLAGS += -I$(OUTPUT)
> +$(ALU32_BUILD_DIR)/test_progs_32: prog_tests/*.c
>
>  $(ALU32_BUILD_DIR)/%.o: progs/%.c $(ALU32_BUILD_DIR) \
>                                         $(ALU32_BUILD_DIR)/test_progs_32
> @@ -196,6 +200,25 @@ ifeq ($(DWARF2BTF),y)
>         $(BTF_PAHOLE) -J $@
>  endif
>
> +PROG_TESTS_H := $(OUTPUT)/prog_tests/tests.h
> +$(OUTPUT)/test_progs: $(PROG_TESTS_H)
> +$(OUTPUT)/test_progs: CFLAGS += -I$(OUTPUT)
> +$(OUTPUT)/test_progs: prog_tests/*.c
> +
> +PROG_TESTS_FILES := $(wildcard prog_tests/*.c)
> +$(PROG_TESTS_H): $(PROG_TESTS_FILES)
> +       $(shell ( cd prog_tests/
> +                 echo '/* Generated header, do not edit */'; \
> +                 echo '#ifdef DECLARE'; \
> +                 ls *.c 2> /dev/null | \
> +                       sed -e 's@\([^\.]*\)\.c@extern void test_\1(void);@'; \
> +                 echo '#endif'; \
> +                 echo '#ifdef CALL'; \
> +                 ls *.c 2> /dev/null | \
> +                       sed -e 's@\([^\.]*\)\.c@test_\1();@'; \
> +                 echo '#endif' \
> +                ) > $(PROG_TESTS_H))
> +
>  VERIFIER_TESTS_H := $(OUTPUT)/verifier/tests.h
>  $(OUTPUT)/test_verifier: $(VERIFIER_TESTS_H)
>  $(OUTPUT)/test_verifier: CFLAGS += -I$(OUTPUT)
> @@ -211,4 +234,4 @@ $(OUTPUT)/verifier/tests.h: $(VERIFIER_TEST_FILES)
>                  ) > $(VERIFIER_TESTS_H))
>
>  EXTRA_CLEAN := $(TEST_CUSTOM_PROGS) $(ALU32_BUILD_DIR) \
> -       $(VERIFIER_TESTS_H)
> +       $(VERIFIER_TESTS_H) $(PROG_TESTS_H)
> diff --git a/tools/testing/selftests/bpf/prog_tests/.gitignore b/tools/testing/selftests/bpf/prog_tests/.gitignore
> new file mode 100644
> index 000000000000..45984a364647
> --- /dev/null
> +++ b/tools/testing/selftests/bpf/prog_tests/.gitignore
> @@ -0,0 +1 @@
> +tests.h
> diff --git a/tools/testing/selftests/bpf/test_progs.c b/tools/testing/selftests/bpf/test_progs.c
> index c59d2e015d16..e49a1e20dc63 100644
> --- a/tools/testing/selftests/bpf/test_progs.c
> +++ b/tools/testing/selftests/bpf/test_progs.c
> @@ -4,57 +4,12 @@
>   * modify it under the terms of version 2 of the GNU General Public
>   * License as published by the Free Software Foundation.
>   */
> -#include <stdio.h>
> -#include <unistd.h>
> -#include <errno.h>
> -#include <string.h>
> -#include <assert.h>
> -#include <stdlib.h>
> -#include <stdarg.h>
> -#include <time.h>
> -#include <signal.h>
> -
> -#include <linux/types.h>
> -typedef __u16 __sum16;
> -#include <arpa/inet.h>
> -#include <linux/if_ether.h>
> -#include <linux/if_packet.h>
> -#include <linux/ip.h>
> -#include <linux/ipv6.h>
> -#include <linux/tcp.h>
> -#include <linux/filter.h>
> -#include <linux/perf_event.h>
> -#include <linux/unistd.h>
> -
> -#include <sys/ioctl.h>
> -#include <sys/wait.h>
> -#include <sys/types.h>
> -#include <sys/time.h>
> -#include <fcntl.h>
> -#include <pthread.h>
> -#include <linux/bpf.h>
> -#include <linux/err.h>
> -#include <bpf/bpf.h>
> -#include <bpf/libbpf.h>
> -
> -#include "test_iptunnel_common.h"
> -#include "bpf_util.h"
> -#include "bpf_endian.h"
> -#include "bpf_rlimit.h"
> -#include "trace_helpers.h"
> -#include "flow_dissector_load.h"
> -
> -static int error_cnt, pass_cnt;
> -static bool jit_enabled;
> -
> -#define MAGIC_BYTES 123
> -
> -/* ipv4 test vector */
> -static struct {
> -       struct ethhdr eth;
> -       struct iphdr iph;
> -       struct tcphdr tcp;
> -} __packed pkt_v4 = {
> +#include "test_progs.h"
> +
> +int error_cnt, pass_cnt;
> +bool jit_enabled;
> +
> +struct ipv4_packet pkt_v4 = {
>         .eth.h_proto = __bpf_constant_htons(ETH_P_IP),
>         .iph.ihl = 5,
>         .iph.protocol = IPPROTO_TCP,
> @@ -63,12 +18,7 @@ static struct {
>         .tcp.doff = 5,
>  };
>
> -/* ipv6 test vector */
> -static struct {
> -       struct ethhdr eth;
> -       struct ipv6hdr iph;
> -       struct tcphdr tcp;
> -} __packed pkt_v6 = {
> +struct ipv6_packet pkt_v6 = {
>         .eth.h_proto = __bpf_constant_htons(ETH_P_IPV6),
>         .iph.nexthdr = IPPROTO_TCP,
>         .iph.payload_len = __bpf_constant_htons(MAGIC_BYTES),
> @@ -76,26 +26,7 @@ static struct {
>         .tcp.doff = 5,
>  };
>
> -#define _CHECK(condition, tag, duration, format...) ({                 \
> -       int __ret = !!(condition);                                      \
> -       if (__ret) {                                                    \
> -               error_cnt++;                                            \
> -               printf("%s:FAIL:%s ", __func__, tag);                   \
> -               printf(format);                                         \
> -       } else {                                                        \
> -               pass_cnt++;                                             \
> -               printf("%s:PASS:%s %d nsec\n", __func__, tag, duration);\
> -       }                                                               \
> -       __ret;                                                          \
> -})
> -
> -#define CHECK(condition, tag, format...) \
> -       _CHECK(condition, tag, duration, format)
> -#define CHECK_ATTR(condition, tag, format...) \
> -       _CHECK(condition, tag, tattr.duration, format)
> -
> -static int bpf_find_map(const char *test, struct bpf_object *obj,
> -                       const char *name)
> +int bpf_find_map(const char *test, struct bpf_object *obj, const char *name)
>  {
>         struct bpf_map *map;
>
> @@ -2150,12 +2081,19 @@ static void test_signal_pending(enum bpf_prog_type prog_type)
>         signal(SIGALRM, SIG_DFL);
>  }
>
> +#define DECLARE
> +#include <prog_tests/tests.h>
> +#undef DECLARE
> +
>  int main(void)
>  {
>         srand(time(NULL));
>
>         jit_enabled = is_jit_enabled();
>
> +#define CALL
> +#include <prog_tests/tests.h>
> +#undef CALL
>         test_pkt_access();
>         test_prog_run_xattr();
>         test_xdp();
> diff --git a/tools/testing/selftests/bpf/test_progs.h b/tools/testing/selftests/bpf/test_progs.h
> new file mode 100644
> index 000000000000..8b79ab3e3042
> --- /dev/null
> +++ b/tools/testing/selftests/bpf/test_progs.h
> @@ -0,0 +1,81 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +#include <stdio.h>
> +#include <unistd.h>
> +#include <errno.h>
> +#include <string.h>
> +#include <assert.h>
> +#include <stdlib.h>
> +#include <stdarg.h>
> +#include <time.h>
> +#include <signal.h>
> +
> +#include <linux/types.h>
> +typedef __u16 __sum16;
> +#include <arpa/inet.h>
> +#include <linux/if_ether.h>
> +#include <linux/if_packet.h>
> +#include <linux/ip.h>
> +#include <linux/ipv6.h>
> +#include <linux/tcp.h>
> +#include <linux/filter.h>
> +#include <linux/perf_event.h>
> +#include <linux/unistd.h>
> +
> +#include <sys/ioctl.h>
> +#include <sys/wait.h>
> +#include <sys/types.h>
> +#include <sys/time.h>
> +#include <fcntl.h>
> +#include <pthread.h>
> +#include <linux/bpf.h>
> +#include <linux/err.h>
> +#include <bpf/bpf.h>
> +#include <bpf/libbpf.h>
> +
> +#include "test_iptunnel_common.h"
> +#include "bpf_util.h"
> +#include "bpf_endian.h"
> +#include "bpf_rlimit.h"
> +#include "trace_helpers.h"
> +#include "flow_dissector_load.h"
> +
> +extern int error_cnt, pass_cnt;
> +extern bool jit_enabled;
> +
> +#define MAGIC_BYTES 123
> +
> +/* ipv4 test vector */
> +struct ipv4_packet {
> +       struct ethhdr eth;
> +       struct iphdr iph;
> +       struct tcphdr tcp;
> +} __packed;
> +extern struct ipv4_packet pkt_v4;
> +
> +/* ipv6 test vector */
> +struct ipv6_packet {
> +       struct ethhdr eth;
> +       struct ipv6hdr iph;
> +       struct tcphdr tcp;
> +} __packed;
> +extern struct ipv6_packet pkt_v6;
> +
> +#define _CHECK(condition, tag, duration, format...) ({                 \
> +       int __ret = !!(condition);                                      \
> +       if (__ret) {                                                    \
> +               error_cnt++;                                            \
> +               printf("%s:FAIL:%s ", __func__, tag);                   \
> +               printf(format);                                         \
> +       } else {                                                        \
> +               pass_cnt++;                                             \
> +               printf("%s:PASS:%s %d nsec\n", __func__, tag, duration);\
> +       }                                                               \
> +       __ret;                                                          \
> +})
> +
> +#define CHECK(condition, tag, format...) \
> +       _CHECK(condition, tag, duration, format)
> +#define CHECK_ATTR(condition, tag, format...) \
> +       _CHECK(condition, tag, tattr.duration, format)
> +
> +int bpf_find_map(const char *test, struct bpf_object *obj, const char *name);
> --
> 2.21.0.rc2.261.ga7da99ff1b-goog
>
diff mbox series

Patch

diff --git a/tools/testing/selftests/bpf/Makefile b/tools/testing/selftests/bpf/Makefile
index ccffaa0a0787..518cd587cd63 100644
--- a/tools/testing/selftests/bpf/Makefile
+++ b/tools/testing/selftests/bpf/Makefile
@@ -165,7 +165,11 @@  $(ALU32_BUILD_DIR)/urandom_read: $(OUTPUT)/urandom_read
 $(ALU32_BUILD_DIR)/test_progs_32: test_progs.c $(ALU32_BUILD_DIR) \
 						$(ALU32_BUILD_DIR)/urandom_read
 	$(CC) $(CFLAGS) -o $(ALU32_BUILD_DIR)/test_progs_32 $< \
-		trace_helpers.c $(OUTPUT)/libbpf.a $(LDLIBS)
+		trace_helpers.c prog_tests/*.c $(OUTPUT)/libbpf.a $(LDLIBS)
+
+$(ALU32_BUILD_DIR)/test_progs_32: $(PROG_TESTS_H)
+$(ALU32_BUILD_DIR)/test_progs_32: CFLAGS += -I$(OUTPUT)
+$(ALU32_BUILD_DIR)/test_progs_32: prog_tests/*.c
 
 $(ALU32_BUILD_DIR)/%.o: progs/%.c $(ALU32_BUILD_DIR) \
 					$(ALU32_BUILD_DIR)/test_progs_32
@@ -196,6 +200,25 @@  ifeq ($(DWARF2BTF),y)
 	$(BTF_PAHOLE) -J $@
 endif
 
+PROG_TESTS_H := $(OUTPUT)/prog_tests/tests.h
+$(OUTPUT)/test_progs: $(PROG_TESTS_H)
+$(OUTPUT)/test_progs: CFLAGS += -I$(OUTPUT)
+$(OUTPUT)/test_progs: prog_tests/*.c
+
+PROG_TESTS_FILES := $(wildcard prog_tests/*.c)
+$(PROG_TESTS_H): $(PROG_TESTS_FILES)
+	$(shell ( cd prog_tests/
+		  echo '/* Generated header, do not edit */'; \
+		  echo '#ifdef DECLARE'; \
+		  ls *.c 2> /dev/null | \
+			sed -e 's@\([^\.]*\)\.c@extern void test_\1(void);@'; \
+		  echo '#endif'; \
+		  echo '#ifdef CALL'; \
+		  ls *.c 2> /dev/null | \
+			sed -e 's@\([^\.]*\)\.c@test_\1();@'; \
+		  echo '#endif' \
+		 ) > $(PROG_TESTS_H))
+
 VERIFIER_TESTS_H := $(OUTPUT)/verifier/tests.h
 $(OUTPUT)/test_verifier: $(VERIFIER_TESTS_H)
 $(OUTPUT)/test_verifier: CFLAGS += -I$(OUTPUT)
@@ -211,4 +234,4 @@  $(OUTPUT)/verifier/tests.h: $(VERIFIER_TEST_FILES)
 		 ) > $(VERIFIER_TESTS_H))
 
 EXTRA_CLEAN := $(TEST_CUSTOM_PROGS) $(ALU32_BUILD_DIR) \
-	$(VERIFIER_TESTS_H)
+	$(VERIFIER_TESTS_H) $(PROG_TESTS_H)
diff --git a/tools/testing/selftests/bpf/prog_tests/.gitignore b/tools/testing/selftests/bpf/prog_tests/.gitignore
new file mode 100644
index 000000000000..45984a364647
--- /dev/null
+++ b/tools/testing/selftests/bpf/prog_tests/.gitignore
@@ -0,0 +1 @@ 
+tests.h
diff --git a/tools/testing/selftests/bpf/test_progs.c b/tools/testing/selftests/bpf/test_progs.c
index c59d2e015d16..e49a1e20dc63 100644
--- a/tools/testing/selftests/bpf/test_progs.c
+++ b/tools/testing/selftests/bpf/test_progs.c
@@ -4,57 +4,12 @@ 
  * modify it under the terms of version 2 of the GNU General Public
  * License as published by the Free Software Foundation.
  */
-#include <stdio.h>
-#include <unistd.h>
-#include <errno.h>
-#include <string.h>
-#include <assert.h>
-#include <stdlib.h>
-#include <stdarg.h>
-#include <time.h>
-#include <signal.h>
-
-#include <linux/types.h>
-typedef __u16 __sum16;
-#include <arpa/inet.h>
-#include <linux/if_ether.h>
-#include <linux/if_packet.h>
-#include <linux/ip.h>
-#include <linux/ipv6.h>
-#include <linux/tcp.h>
-#include <linux/filter.h>
-#include <linux/perf_event.h>
-#include <linux/unistd.h>
-
-#include <sys/ioctl.h>
-#include <sys/wait.h>
-#include <sys/types.h>
-#include <sys/time.h>
-#include <fcntl.h>
-#include <pthread.h>
-#include <linux/bpf.h>
-#include <linux/err.h>
-#include <bpf/bpf.h>
-#include <bpf/libbpf.h>
-
-#include "test_iptunnel_common.h"
-#include "bpf_util.h"
-#include "bpf_endian.h"
-#include "bpf_rlimit.h"
-#include "trace_helpers.h"
-#include "flow_dissector_load.h"
-
-static int error_cnt, pass_cnt;
-static bool jit_enabled;
-
-#define MAGIC_BYTES 123
-
-/* ipv4 test vector */
-static struct {
-	struct ethhdr eth;
-	struct iphdr iph;
-	struct tcphdr tcp;
-} __packed pkt_v4 = {
+#include "test_progs.h"
+
+int error_cnt, pass_cnt;
+bool jit_enabled;
+
+struct ipv4_packet pkt_v4 = {
 	.eth.h_proto = __bpf_constant_htons(ETH_P_IP),
 	.iph.ihl = 5,
 	.iph.protocol = IPPROTO_TCP,
@@ -63,12 +18,7 @@  static struct {
 	.tcp.doff = 5,
 };
 
-/* ipv6 test vector */
-static struct {
-	struct ethhdr eth;
-	struct ipv6hdr iph;
-	struct tcphdr tcp;
-} __packed pkt_v6 = {
+struct ipv6_packet pkt_v6 = {
 	.eth.h_proto = __bpf_constant_htons(ETH_P_IPV6),
 	.iph.nexthdr = IPPROTO_TCP,
 	.iph.payload_len = __bpf_constant_htons(MAGIC_BYTES),
@@ -76,26 +26,7 @@  static struct {
 	.tcp.doff = 5,
 };
 
-#define _CHECK(condition, tag, duration, format...) ({			\
-	int __ret = !!(condition);					\
-	if (__ret) {							\
-		error_cnt++;						\
-		printf("%s:FAIL:%s ", __func__, tag);			\
-		printf(format);						\
-	} else {							\
-		pass_cnt++;						\
-		printf("%s:PASS:%s %d nsec\n", __func__, tag, duration);\
-	}								\
-	__ret;								\
-})
-
-#define CHECK(condition, tag, format...) \
-	_CHECK(condition, tag, duration, format)
-#define CHECK_ATTR(condition, tag, format...) \
-	_CHECK(condition, tag, tattr.duration, format)
-
-static int bpf_find_map(const char *test, struct bpf_object *obj,
-			const char *name)
+int bpf_find_map(const char *test, struct bpf_object *obj, const char *name)
 {
 	struct bpf_map *map;
 
@@ -2150,12 +2081,19 @@  static void test_signal_pending(enum bpf_prog_type prog_type)
 	signal(SIGALRM, SIG_DFL);
 }
 
+#define DECLARE
+#include <prog_tests/tests.h>
+#undef DECLARE
+
 int main(void)
 {
 	srand(time(NULL));
 
 	jit_enabled = is_jit_enabled();
 
+#define CALL
+#include <prog_tests/tests.h>
+#undef CALL
 	test_pkt_access();
 	test_prog_run_xattr();
 	test_xdp();
diff --git a/tools/testing/selftests/bpf/test_progs.h b/tools/testing/selftests/bpf/test_progs.h
new file mode 100644
index 000000000000..8b79ab3e3042
--- /dev/null
+++ b/tools/testing/selftests/bpf/test_progs.h
@@ -0,0 +1,81 @@ 
+/* SPDX-License-Identifier: GPL-2.0 */
+#include <stdio.h>
+#include <unistd.h>
+#include <errno.h>
+#include <string.h>
+#include <assert.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#include <time.h>
+#include <signal.h>
+
+#include <linux/types.h>
+typedef __u16 __sum16;
+#include <arpa/inet.h>
+#include <linux/if_ether.h>
+#include <linux/if_packet.h>
+#include <linux/ip.h>
+#include <linux/ipv6.h>
+#include <linux/tcp.h>
+#include <linux/filter.h>
+#include <linux/perf_event.h>
+#include <linux/unistd.h>
+
+#include <sys/ioctl.h>
+#include <sys/wait.h>
+#include <sys/types.h>
+#include <sys/time.h>
+#include <fcntl.h>
+#include <pthread.h>
+#include <linux/bpf.h>
+#include <linux/err.h>
+#include <bpf/bpf.h>
+#include <bpf/libbpf.h>
+
+#include "test_iptunnel_common.h"
+#include "bpf_util.h"
+#include "bpf_endian.h"
+#include "bpf_rlimit.h"
+#include "trace_helpers.h"
+#include "flow_dissector_load.h"
+
+extern int error_cnt, pass_cnt;
+extern bool jit_enabled;
+
+#define MAGIC_BYTES 123
+
+/* ipv4 test vector */
+struct ipv4_packet {
+	struct ethhdr eth;
+	struct iphdr iph;
+	struct tcphdr tcp;
+} __packed;
+extern struct ipv4_packet pkt_v4;
+
+/* ipv6 test vector */
+struct ipv6_packet {
+	struct ethhdr eth;
+	struct ipv6hdr iph;
+	struct tcphdr tcp;
+} __packed;
+extern struct ipv6_packet pkt_v6;
+
+#define _CHECK(condition, tag, duration, format...) ({			\
+	int __ret = !!(condition);					\
+	if (__ret) {							\
+		error_cnt++;						\
+		printf("%s:FAIL:%s ", __func__, tag);			\
+		printf(format);						\
+	} else {							\
+		pass_cnt++;						\
+		printf("%s:PASS:%s %d nsec\n", __func__, tag, duration);\
+	}								\
+	__ret;								\
+})
+
+#define CHECK(condition, tag, format...) \
+	_CHECK(condition, tag, duration, format)
+#define CHECK_ATTR(condition, tag, format...) \
+	_CHECK(condition, tag, tattr.duration, format)
+
+int bpf_find_map(const char *test, struct bpf_object *obj, const char *name);