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// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2019 Facebook */
#include <test_progs.h>
#include <network_helpers.h>
static void test_fexit_bpf2bpf_common(const char *obj_file,
const char *target_obj_file,
int prog_cnt,
const char **prog_name,
bool run_prog)
{
struct bpf_object *obj = NULL, *pkt_obj;
int err, pkt_fd, i;
struct bpf_link **link = NULL;
struct bpf_program **prog = NULL;
__u32 duration = 0, retval;
struct bpf_map *data_map;
const int zero = 0;
__u64 *result = NULL;
err = bpf_prog_load(target_obj_file, BPF_PROG_TYPE_UNSPEC,
&pkt_obj, &pkt_fd);
if (CHECK(err, "tgt_prog_load", "file %s err %d errno %d\n",
target_obj_file, err, errno))
return;
DECLARE_LIBBPF_OPTS(bpf_object_open_opts, opts,
.attach_prog_fd = pkt_fd,
);
link = calloc(sizeof(struct bpf_link *), prog_cnt);
prog = calloc(sizeof(struct bpf_program *), prog_cnt);
result = malloc((prog_cnt + 32 /* spare */) * sizeof(__u64));
if (CHECK(!link || !prog || !result, "alloc_memory",
"failed to alloc memory"))
goto close_prog;
obj = bpf_object__open_file(obj_file, &opts);
if (CHECK(IS_ERR_OR_NULL(obj), "obj_open",
"failed to open %s: %ld\n", obj_file,
PTR_ERR(obj)))
goto close_prog;
err = bpf_object__load(obj);
if (CHECK(err, "obj_load", "err %d\n", err))
goto close_prog;
for (i = 0; i < prog_cnt; i++) {
prog[i] = bpf_object__find_program_by_title(obj, prog_name[i]);
if (CHECK(!prog[i], "find_prog", "prog %s not found\n", prog_name[i]))
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;
}
if (!run_prog)
goto close_prog;
data_map = bpf_object__find_map_by_name(obj, "fexit_bp.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 < prog_cnt; i++)
if (CHECK(result[i] != 1, "result", "fexit_bpf2bpf failed err %llu\n",
result[i]))
goto close_prog;
close_prog:
for (i = 0; i < prog_cnt; i++)
if (!IS_ERR_OR_NULL(link[i]))
bpf_link__destroy(link[i]);
if (!IS_ERR_OR_NULL(obj))
bpf_object__close(obj);
bpf_object__close(pkt_obj);
free(link);
free(prog);
free(result);
}
static void test_target_no_callees(void)
{
const char *prog_name[] = {
"fexit/test_pkt_md_access",
};
test_fexit_bpf2bpf_common("./fexit_bpf2bpf_simple.o",
"./test_pkt_md_access.o",
ARRAY_SIZE(prog_name),
prog_name, true);
}
static void test_target_yes_callees(void)
{
const char *prog_name[] = {
"fexit/test_pkt_access",
"fexit/test_pkt_access_subprog1",
"fexit/test_pkt_access_subprog2",
"fexit/test_pkt_access_subprog3",
};
test_fexit_bpf2bpf_common("./fexit_bpf2bpf.o",
"./test_pkt_access.o",
ARRAY_SIZE(prog_name),
prog_name, true);
}
static void test_func_replace(void)
{
const char *prog_name[] = {
"fexit/test_pkt_access",
"fexit/test_pkt_access_subprog1",
"fexit/test_pkt_access_subprog2",
"fexit/test_pkt_access_subprog3",
"freplace/get_skb_len",
"freplace/get_skb_ifindex",
"freplace/get_constant",
"freplace/test_pkt_write_access_subprog",
};
test_fexit_bpf2bpf_common("./fexit_bpf2bpf.o",
"./test_pkt_access.o",
ARRAY_SIZE(prog_name),
prog_name, true);
}
static void test_func_replace_verify(void)
{
const char *prog_name[] = {
"freplace/do_bind",
};
test_fexit_bpf2bpf_common("./freplace_connect4.o",
"./connect4_prog.o",
ARRAY_SIZE(prog_name),
prog_name, false);
}
static void test_func_sockmap_update(void)
{
const char *prog_name[] = {
"freplace/cls_redirect",
};
test_fexit_bpf2bpf_common("./freplace_cls_redirect.o",
"./test_cls_redirect.o",
ARRAY_SIZE(prog_name),
prog_name, false);
}
static void test_obj_load_failure_common(const char *obj_file,
const char *target_obj_file)
{
/*
* standalone test that asserts failure to load freplace prog
* because of invalid return code.
*/
struct bpf_object *obj = NULL, *pkt_obj;
int err, pkt_fd;
__u32 duration = 0;
err = bpf_prog_load(target_obj_file, BPF_PROG_TYPE_UNSPEC,
&pkt_obj, &pkt_fd);
/* the target prog should load fine */
if (CHECK(err, "tgt_prog_load", "file %s err %d errno %d\n",
target_obj_file, err, errno))
return;
DECLARE_LIBBPF_OPTS(bpf_object_open_opts, opts,
.attach_prog_fd = pkt_fd,
);
obj = bpf_object__open_file(obj_file, &opts);
if (CHECK(IS_ERR_OR_NULL(obj), "obj_open",
"failed to open %s: %ld\n", obj_file,
PTR_ERR(obj)))
goto close_prog;
/* It should fail to load the program */
err = bpf_object__load(obj);
if (CHECK(!err, "bpf_obj_load should fail", "err %d\n", err))
goto close_prog;
close_prog:
if (!IS_ERR_OR_NULL(obj))
bpf_object__close(obj);
bpf_object__close(pkt_obj);
}
static void test_func_replace_return_code(void)
{
/* test invalid return code in the replaced program */
test_obj_load_failure_common("./freplace_connect_v4_prog.o",
"./connect4_prog.o");
}
static void test_func_map_prog_compatibility(void)
{
/* test with spin lock map value in the replaced program */
test_obj_load_failure_common("./freplace_attach_probe.o",
"./test_attach_probe.o");
}
void test_fexit_bpf2bpf(void)
{
if (test__start_subtest("target_no_callees"))
test_target_no_callees();
if (test__start_subtest("target_yes_callees"))
test_target_yes_callees();
if (test__start_subtest("func_replace"))
test_func_replace();
if (test__start_subtest("func_replace_verify"))
test_func_replace_verify();
if (test__start_subtest("func_sockmap_update"))
test_func_sockmap_update();
if (test__start_subtest("func_replace_return_code"))
test_func_replace_return_code();
if (test__start_subtest("func_map_prog_compatibility"))
test_func_map_prog_compatibility();
}
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