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Message-Id: <20190122212315.137291-4-sdf@google.com>
Date: Tue, 22 Jan 2019 13:23:15 -0800
From: Stanislav Fomichev <sdf@...gle.com>
To: netdev@...r.kernel.org
Cc: davem@...emloft.net, ast@...nel.org, daniel@...earbox.net,
Stanislav Fomichev <sdf@...gle.com>
Subject: [PATCH bpf-next 3/3] selftests/bpf: add simple BPF_PROG_TEST_RUN
examples for flow dissector
Use existing pkt_v4 and pkt_v6 to make sure flow_keys are what we want.
Also, add new bpf_flow_load routine (and flow_dissector_load.h header)
that loads bpf_flow.o program and does all required setup.
Signed-off-by: Stanislav Fomichev <sdf@...gle.com>
---
tools/testing/selftests/bpf/Makefile | 3 +
.../selftests/bpf/flow_dissector_load.c | 43 ++--------
.../selftests/bpf/flow_dissector_load.h | 55 +++++++++++++
tools/testing/selftests/bpf/test_progs.c | 78 ++++++++++++++++++-
4 files changed, 139 insertions(+), 40 deletions(-)
create mode 100644 tools/testing/selftests/bpf/flow_dissector_load.h
diff --git a/tools/testing/selftests/bpf/Makefile b/tools/testing/selftests/bpf/Makefile
index 70229de510f5..ade67470a152 100644
--- a/tools/testing/selftests/bpf/Makefile
+++ b/tools/testing/selftests/bpf/Makefile
@@ -19,6 +19,9 @@ all: $(TEST_CUSTOM_PROGS)
$(TEST_CUSTOM_PROGS): $(OUTPUT)/%: %.c
$(CC) -o $(TEST_CUSTOM_PROGS) -static $< -Wl,--build-id
+flow_dissector_load.c: flow_dissector_load.h
+test_run.c: flow_dissector_load.h
+
# Order correspond to 'make run_tests' order
TEST_GEN_PROGS = test_verifier test_tag test_maps test_lru_map test_lpm_map test_progs \
test_align test_verifier_log test_dev_cgroup test_tcpbpf_user \
diff --git a/tools/testing/selftests/bpf/flow_dissector_load.c b/tools/testing/selftests/bpf/flow_dissector_load.c
index ae8180b11d5f..77cafa66d048 100644
--- a/tools/testing/selftests/bpf/flow_dissector_load.c
+++ b/tools/testing/selftests/bpf/flow_dissector_load.c
@@ -12,6 +12,7 @@
#include <bpf/libbpf.h>
#include "bpf_rlimit.h"
+#include "flow_dissector_load.h"
const char *cfg_pin_path = "/sys/fs/bpf/flow_dissector";
const char *cfg_map_name = "jmp_table";
@@ -21,46 +22,13 @@ char *cfg_path_name;
static void load_and_attach_program(void)
{
- struct bpf_program *prog, *main_prog;
- struct bpf_map *prog_array;
- int i, fd, prog_fd, ret;
+ int prog_fd, ret;
struct bpf_object *obj;
- int prog_array_fd;
- ret = bpf_prog_load(cfg_path_name, BPF_PROG_TYPE_FLOW_DISSECTOR, &obj,
- &prog_fd);
+ ret = bpf_flow_load(&obj, cfg_path_name, cfg_section_name,
+ cfg_map_name, &prog_fd);
if (ret)
- error(1, 0, "bpf_prog_load %s", cfg_path_name);
-
- main_prog = bpf_object__find_program_by_title(obj, cfg_section_name);
- if (!main_prog)
- error(1, 0, "bpf_object__find_program_by_title %s",
- cfg_section_name);
-
- prog_fd = bpf_program__fd(main_prog);
- if (prog_fd < 0)
- error(1, 0, "bpf_program__fd");
-
- prog_array = bpf_object__find_map_by_name(obj, cfg_map_name);
- if (!prog_array)
- error(1, 0, "bpf_object__find_map_by_name %s", cfg_map_name);
-
- prog_array_fd = bpf_map__fd(prog_array);
- if (prog_array_fd < 0)
- error(1, 0, "bpf_map__fd %s", cfg_map_name);
-
- i = 0;
- bpf_object__for_each_program(prog, obj) {
- fd = bpf_program__fd(prog);
- if (fd < 0)
- error(1, 0, "bpf_program__fd");
-
- if (fd != prog_fd) {
- printf("%d: %s\n", i, bpf_program__title(prog, false));
- bpf_map_update_elem(prog_array_fd, &i, &fd, BPF_ANY);
- ++i;
- }
- }
+ error(1, 0, "bpf_flow_load %s", cfg_path_name);
ret = bpf_prog_attach(prog_fd, 0 /* Ignore */, BPF_FLOW_DISSECTOR, 0);
if (ret)
@@ -69,7 +37,6 @@ static void load_and_attach_program(void)
ret = bpf_object__pin(obj, cfg_pin_path);
if (ret)
error(1, 0, "bpf_object__pin %s", cfg_pin_path);
-
}
static void detach_program(void)
diff --git a/tools/testing/selftests/bpf/flow_dissector_load.h b/tools/testing/selftests/bpf/flow_dissector_load.h
new file mode 100644
index 000000000000..41dd6959feb0
--- /dev/null
+++ b/tools/testing/selftests/bpf/flow_dissector_load.h
@@ -0,0 +1,55 @@
+/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) */
+#ifndef FLOW_DISSECTOR_LOAD
+#define FLOW_DISSECTOR_LOAD
+
+#include <bpf/bpf.h>
+#include <bpf/libbpf.h>
+
+static inline int bpf_flow_load(struct bpf_object **obj,
+ const char *path,
+ const char *section_name,
+ const char *map_name,
+ int *prog_fd)
+{
+ struct bpf_program *prog, *main_prog;
+ struct bpf_map *prog_array;
+ int prog_array_fd;
+ int ret, fd, i;
+
+ ret = bpf_prog_load(path, BPF_PROG_TYPE_FLOW_DISSECTOR, obj,
+ prog_fd);
+ if (ret)
+ return ret;
+
+ main_prog = bpf_object__find_program_by_title(*obj, section_name);
+ if (!main_prog)
+ return ret;
+
+ *prog_fd = bpf_program__fd(main_prog);
+ if (*prog_fd < 0)
+ return ret;
+
+ prog_array = bpf_object__find_map_by_name(*obj, map_name);
+ if (!prog_array)
+ return ret;
+
+ prog_array_fd = bpf_map__fd(prog_array);
+ if (prog_array_fd < 0)
+ return ret;
+
+ i = 0;
+ bpf_object__for_each_program(prog, *obj) {
+ fd = bpf_program__fd(prog);
+ if (fd < 0)
+ return fd;
+
+ if (fd != *prog_fd) {
+ bpf_map_update_elem(prog_array_fd, &i, &fd, BPF_ANY);
+ ++i;
+ }
+ }
+
+ return 0;
+}
+
+#endif /* FLOW_DISSECTOR_LOAD */
diff --git a/tools/testing/selftests/bpf/test_progs.c b/tools/testing/selftests/bpf/test_progs.c
index 126fc624290d..5f46680d4ad4 100644
--- a/tools/testing/selftests/bpf/test_progs.c
+++ b/tools/testing/selftests/bpf/test_progs.c
@@ -39,6 +39,7 @@ typedef __u16 __sum16;
#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;
@@ -53,9 +54,10 @@ static struct {
} __packed pkt_v4 = {
.eth.h_proto = __bpf_constant_htons(ETH_P_IP),
.iph.ihl = 5,
- .iph.protocol = 6,
+ .iph.protocol = IPPROTO_TCP,
.iph.tot_len = __bpf_constant_htons(MAGIC_BYTES),
.tcp.urg_ptr = 123,
+ .tcp.doff = 5,
};
/* ipv6 test vector */
@@ -65,9 +67,10 @@ static struct {
struct tcphdr tcp;
} __packed pkt_v6 = {
.eth.h_proto = __bpf_constant_htons(ETH_P_IPV6),
- .iph.nexthdr = 6,
+ .iph.nexthdr = IPPROTO_TCP,
.iph.payload_len = __bpf_constant_htons(MAGIC_BYTES),
.tcp.urg_ptr = 123,
+ .tcp.doff = 5,
};
#define _CHECK(condition, tag, duration, format...) ({ \
@@ -1882,6 +1885,76 @@ static void test_queue_stack_map(int type)
bpf_object__close(obj);
}
+#define CHECK_FLOW_KEYS(desc, got, expected) \
+ CHECK(memcmp(&got, &expected, sizeof(got)) != 0, \
+ desc, \
+ "nhoff=%u/%u " \
+ "thoff=%u/%u " \
+ "addr_proto=0x%x/0x%x " \
+ "is_frag=%u/%u " \
+ "is_first_frag=%u/%u " \
+ "is_encap=%u/%u " \
+ "n_proto=0x%x/0x%x " \
+ "sport=%u/%u " \
+ "dport=%u/%u\n", \
+ got.nhoff, expected.nhoff, \
+ got.thoff, expected.thoff, \
+ got.addr_proto, expected.addr_proto, \
+ got.is_frag, expected.is_frag, \
+ got.is_first_frag, expected.is_first_frag, \
+ got.is_encap, expected.is_encap, \
+ got.n_proto, expected.n_proto, \
+ got.sport, expected.sport, \
+ got.dport, expected.dport)
+
+static struct bpf_flow_keys pkt_v4_flow_keys = {
+ .nhoff = 0,
+ .thoff = sizeof(struct iphdr),
+ .addr_proto = ETH_P_IP,
+ .ip_proto = IPPROTO_TCP,
+ .n_proto = bpf_htons(ETH_P_IP),
+};
+
+static struct bpf_flow_keys pkt_v6_flow_keys = {
+ .nhoff = 0,
+ .thoff = sizeof(struct ipv6hdr),
+ .addr_proto = ETH_P_IPV6,
+ .ip_proto = IPPROTO_TCP,
+ .n_proto = bpf_htons(ETH_P_IPV6),
+};
+
+static void test_flow_dissector(void)
+{
+ struct bpf_flow_keys flow_keys;
+ struct bpf_object *obj;
+ __u32 duration, retval;
+ int err, prog_fd;
+ __u32 size;
+
+ err = bpf_flow_load(&obj, "./bpf_flow.o", "flow_dissector",
+ "jmp_table", &prog_fd);
+ if (err) {
+ error_cnt++;
+ return;
+ }
+
+ err = bpf_prog_test_run(prog_fd, 10, &pkt_v4, sizeof(pkt_v4),
+ &flow_keys, &size, &retval, &duration);
+ CHECK(size != sizeof(flow_keys) || err || retval != 1, "ipv4",
+ "err %d errno %d retval %d duration %d size %u/%lu\n",
+ err, errno, retval, duration, size, sizeof(flow_keys));
+ CHECK_FLOW_KEYS("ipv4_flow_keys", flow_keys, pkt_v4_flow_keys);
+
+ err = bpf_prog_test_run(prog_fd, 10, &pkt_v6, sizeof(pkt_v6),
+ &flow_keys, &size, &retval, &duration);
+ CHECK(size != sizeof(flow_keys) || err || retval != 1, "ipv6",
+ "err %d errno %d retval %d duration %d size %u/%lu\n",
+ err, errno, retval, duration, size, sizeof(flow_keys));
+ CHECK_FLOW_KEYS("ipv6_flow_keys", flow_keys, pkt_v6_flow_keys);
+
+ bpf_object__close(obj);
+}
+
int main(void)
{
srand(time(NULL));
@@ -1909,6 +1982,7 @@ int main(void)
test_reference_tracking();
test_queue_stack_map(QUEUE);
test_queue_stack_map(STACK);
+ test_flow_dissector();
printf("Summary: %d PASSED, %d FAILED\n", pass_cnt, error_cnt);
return error_cnt ? EXIT_FAILURE : EXIT_SUCCESS;
--
2.20.1.321.g9e740568ce-goog
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