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Message-ID: <20191114185720.1641606-11-ast@kernel.org>
Date: Thu, 14 Nov 2019 10:57:10 -0800
From: Alexei Starovoitov <ast@...nel.org>
To: <davem@...emloft.net>
CC: <daniel@...earbox.net>, <x86@...nel.org>, <netdev@...r.kernel.org>,
<bpf@...r.kernel.org>, <kernel-team@...com>
Subject: [PATCH v4 bpf-next 10/20] selftests/bpf: Add fexit tests for BPF trampoline
Add fexit tests for BPF trampoline that checks kernel functions
with up to 6 arguments of different sizes and their return values.
Signed-off-by: Alexei Starovoitov <ast@...nel.org>
Acked-by: Song Liu <songliubraving@...com>
---
.../selftests/bpf/prog_tests/fexit_test.c | 64 ++++++++++++
.../testing/selftests/bpf/progs/fexit_test.c | 98 +++++++++++++++++++
2 files changed, 162 insertions(+)
create mode 100644 tools/testing/selftests/bpf/prog_tests/fexit_test.c
create mode 100644 tools/testing/selftests/bpf/progs/fexit_test.c
diff --git a/tools/testing/selftests/bpf/prog_tests/fexit_test.c b/tools/testing/selftests/bpf/prog_tests/fexit_test.c
new file mode 100644
index 000000000000..f99013222c74
--- /dev/null
+++ b/tools/testing/selftests/bpf/prog_tests/fexit_test.c
@@ -0,0 +1,64 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright (c) 2019 Facebook */
+#include <test_progs.h>
+
+void test_fexit_test(void)
+{
+ struct bpf_prog_load_attr attr = {
+ .file = "./fexit_test.o",
+ };
+
+ char prog_name[] = "fexit/bpf_fentry_testX";
+ struct bpf_object *obj = NULL, *pkt_obj;
+ int err, pkt_fd, kfree_skb_fd, i;
+ struct bpf_link *link[6] = {};
+ struct bpf_program *prog[6];
+ __u32 duration, retval;
+ struct bpf_map *data_map;
+ const int zero = 0;
+ u64 result[6];
+
+ err = bpf_prog_load("./test_pkt_access.o", BPF_PROG_TYPE_SCHED_CLS,
+ &pkt_obj, &pkt_fd);
+ if (CHECK(err, "prog_load sched cls", "err %d errno %d\n", err, errno))
+ return;
+ err = bpf_prog_load_xattr(&attr, &obj, &kfree_skb_fd);
+ if (CHECK(err, "prog_load fail", "err %d errno %d\n", err, errno))
+ goto close_prog;
+
+ for (i = 0; i < 6; i++) {
+ prog_name[sizeof(prog_name) - 2] = '1' + i;
+ prog[i] = bpf_object__find_program_by_title(obj, prog_name);
+ if (CHECK(!prog[i], "find_prog", "prog %s not found\n", prog_name))
+ goto close_prog;
+ link[i] = bpf_program__attach_trace(prog[i]);
+ if (CHECK(IS_ERR(link[i]), "attach_trace", "failed to link\n"))
+ goto close_prog;
+ }
+ data_map = bpf_object__find_map_by_name(obj, "fexit_te.bss");
+ if (CHECK(!data_map, "find_data_map", "data map not found\n"))
+ goto close_prog;
+
+ err = bpf_prog_test_run(pkt_fd, 1, &pkt_v6, sizeof(pkt_v6),
+ NULL, NULL, &retval, &duration);
+ CHECK(err || retval, "ipv6",
+ "err %d errno %d retval %d duration %d\n",
+ err, errno, retval, duration);
+
+ err = bpf_map_lookup_elem(bpf_map__fd(data_map), &zero, &result);
+ if (CHECK(err, "get_result",
+ "failed to get output data: %d\n", err))
+ goto close_prog;
+
+ for (i = 0; i < 6; i++)
+ if (CHECK(result[i] != 1, "result", "bpf_fentry_test%d failed err %ld\n",
+ i + 1, result[i]))
+ goto close_prog;
+
+close_prog:
+ for (i = 0; i < 6; i++)
+ if (!IS_ERR_OR_NULL(link[i]))
+ bpf_link__destroy(link[i]);
+ bpf_object__close(obj);
+ bpf_object__close(pkt_obj);
+}
diff --git a/tools/testing/selftests/bpf/progs/fexit_test.c b/tools/testing/selftests/bpf/progs/fexit_test.c
new file mode 100644
index 000000000000..8b98b1a51784
--- /dev/null
+++ b/tools/testing/selftests/bpf/progs/fexit_test.c
@@ -0,0 +1,98 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright (c) 2019 Facebook */
+#include <linux/bpf.h>
+#include "bpf_helpers.h"
+
+char _license[] SEC("license") = "GPL";
+
+struct test1 {
+ ks32 a;
+ ks32 ret;
+};
+static volatile __u64 test1_result;
+SEC("fexit/bpf_fentry_test1")
+int test1(struct test1 *ctx)
+{
+ test1_result = ctx->a == 1 && ctx->ret == 2;
+ return 0;
+}
+
+struct test2 {
+ ks32 a;
+ ku64 b;
+ ks32 ret;
+};
+static volatile __u64 test2_result;
+SEC("fexit/bpf_fentry_test2")
+int test2(struct test2 *ctx)
+{
+ test2_result = ctx->a == 2 && ctx->b == 3 && ctx->ret == 5;
+ return 0;
+}
+
+struct test3 {
+ ks8 a;
+ ks32 b;
+ ku64 c;
+ ks32 ret;
+};
+static volatile __u64 test3_result;
+SEC("fexit/bpf_fentry_test3")
+int test3(struct test3 *ctx)
+{
+ test3_result = ctx->a == 4 && ctx->b == 5 && ctx->c == 6 &&
+ ctx->ret == 15;
+ return 0;
+}
+
+struct test4 {
+ void *a;
+ ks8 b;
+ ks32 c;
+ ku64 d;
+ ks32 ret;
+};
+static volatile __u64 test4_result;
+SEC("fexit/bpf_fentry_test4")
+int test4(struct test4 *ctx)
+{
+ test4_result = ctx->a == (void *)7 && ctx->b == 8 && ctx->c == 9 &&
+ ctx->d == 10 && ctx->ret == 34;
+ return 0;
+}
+
+struct test5 {
+ ku64 a;
+ void *b;
+ ks16 c;
+ ks32 d;
+ ku64 e;
+ ks32 ret;
+};
+static volatile __u64 test5_result;
+SEC("fexit/bpf_fentry_test5")
+int test5(struct test5 *ctx)
+{
+ test5_result = ctx->a == 11 && ctx->b == (void *)12 && ctx->c == 13 &&
+ ctx->d == 14 && ctx->e == 15 && ctx->ret == 65;
+ return 0;
+}
+
+struct test6 {
+ ku64 a;
+ void *b;
+ ks16 c;
+ ks32 d;
+ void *e;
+ ks64 f;
+ ks32 ret;
+};
+static volatile __u64 test6_result;
+SEC("fexit/bpf_fentry_test6")
+int test6(struct test6 *ctx)
+{
+ test6_result = ctx->a == 16 && ctx->b == (void *)17 && ctx->c == 18 &&
+ ctx->d == 19 && ctx->e == (void *)20 && ctx->f == 21 &&
+ ctx->ret == 111;
+ return 0;
+}
--
2.23.0
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