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selftests/bpf: Add combined fentry/fexit test

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Add a combined fentry/fexit test.

Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Song Liu <songliubraving@fb.com>
Link: https://lore.kernel.org/bpf/20191114185720.1641606-12-ast@kernel.org
This commit is contained in:
Alexei Starovoitov 2019-11-14 10:57:11 -08:00 committed by Daniel Borkmann
parent d3b0856e59
commit 510312882c
1 changed files with 90 additions and 0 deletions
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90
tools/testing/selftests/bpf/prog_tests/fentry_fexit.c Normal file
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// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2019 Facebook */
#include <test_progs.h>
void test_fentry_fexit(void)
{
struct bpf_prog_load_attr attr_fentry = {
.file = "./fentry_test.o",
};
struct bpf_prog_load_attr attr_fexit = {
.file = "./fexit_test.o",
};
struct bpf_object *obj_fentry = NULL, *obj_fexit = NULL, *pkt_obj;
struct bpf_map *data_map_fentry, *data_map_fexit;
char fentry_name[] = "fentry/bpf_fentry_testX";
char fexit_name[] = "fexit/bpf_fentry_testX";
int err, pkt_fd, kfree_skb_fd, i;
struct bpf_link *link[12] = {};
struct bpf_program *prog[12];
__u32 duration, retval;
const int zero = 0;
u64 result[12];
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_fentry, &obj_fentry, &kfree_skb_fd);
if (CHECK(err, "prog_load fail", "err %d errno %d\n", err, errno))
goto close_prog;
err = bpf_prog_load_xattr(&attr_fexit, &obj_fexit, &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++) {
fentry_name[sizeof(fentry_name) - 2] = '1' + i;
prog[i] = bpf_object__find_program_by_title(obj_fentry, fentry_name);
if (CHECK(!prog[i], "find_prog", "prog %s not found\n", fentry_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_fentry = bpf_object__find_map_by_name(obj_fentry, "fentry_t.bss");
if (CHECK(!data_map_fentry, "find_data_map", "data map not found\n"))
goto close_prog;
for (i = 6; i < 12; i++) {
fexit_name[sizeof(fexit_name) - 2] = '1' + i - 6;
prog[i] = bpf_object__find_program_by_title(obj_fexit, fexit_name);
if (CHECK(!prog[i], "find_prog", "prog %s not found\n", fexit_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_fexit = bpf_object__find_map_by_name(obj_fexit, "fexit_te.bss");
if (CHECK(!data_map_fexit, "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_fentry), &zero, &result);
if (CHECK(err, "get_result",
"failed to get output data: %d\n", err))
goto close_prog;
err = bpf_map_lookup_elem(bpf_map__fd(data_map_fexit), &zero, result + 6);
if (CHECK(err, "get_result",
"failed to get output data: %d\n", err))
goto close_prog;
for (i = 0; i < 12; i++)
if (CHECK(result[i] != 1, "result", "bpf_fentry_test%d failed err %ld\n",
i % 6 + 1, result[i]))
goto close_prog;
close_prog:
for (i = 0; i < 12; i++)
if (!IS_ERR_OR_NULL(link[i]))
bpf_link__destroy(link[i]);
bpf_object__close(obj_fentry);
bpf_object__close(obj_fexit);
bpf_object__close(pkt_obj);
}