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// SPDX-License-Identifier: GPL-2.0
#include <test_progs.h>
#include <linux/if_ether.h>
#include <linux/in.h>
#include <linux/ip.h>
#include <linux/ipv6.h>
#include <linux/in6.h>
#include <linux/udp.h>
#include <linux/tcp.h>
#include <sys/syscall.h>
#include <bpf/bpf.h>
#include "bpf_gotox.skel.h"
static void __test_run(struct bpf_program *prog, void *ctx_in, size_t ctx_size_in)
{
LIBBPF_OPTS(bpf_test_run_opts, topts,
.ctx_in = ctx_in,
.ctx_size_in = ctx_size_in,
);
int err, prog_fd;
prog_fd = bpf_program__fd(prog);
err = bpf_prog_test_run_opts(prog_fd, &topts);
ASSERT_OK(err, "test_run_opts err");
}
static void __subtest(struct bpf_gotox *skel, void (*check)(struct bpf_gotox *))
{
if (skel->data->skip)
test__skip();
else
check(skel);
}
static void check_simple(struct bpf_gotox *skel,
struct bpf_program *prog,
__u64 ctx_in,
__u64 expected)
{
skel->bss->ret_user = 0;
__test_run(prog, &ctx_in, sizeof(ctx_in));
if (!ASSERT_EQ(skel->bss->ret_user, expected, "skel->bss->ret_user"))
return;
}
static void check_simple_fentry(struct bpf_gotox *skel,
struct bpf_program *prog,
__u64 ctx_in,
__u64 expected)
{
skel->bss->in_user = ctx_in;
skel->bss->ret_user = 0;
/* trigger */
usleep(1);
if (!ASSERT_EQ(skel->bss->ret_user, expected, "skel->bss->ret_user"))
return;
}
/* validate that for two loads of the same jump table libbpf generates only one map */
static void check_one_map_two_jumps(struct bpf_gotox *skel)
{
struct bpf_prog_info prog_info;
struct bpf_map_info map_info;
__u32 len;
__u32 map_ids[16];
int prog_fd, map_fd;
int ret;
int i;
bool seen = false;
memset(&prog_info, 0, sizeof(prog_info));
prog_info.map_ids = (long)map_ids;
prog_info.nr_map_ids = ARRAY_SIZE(map_ids);
prog_fd = bpf_program__fd(skel->progs.one_map_two_jumps);
if (!ASSERT_GE(prog_fd, 0, "bpf_program__fd(one_map_two_jumps)"))
return;
len = sizeof(prog_info);
ret = bpf_obj_get_info_by_fd(prog_fd, &prog_info, &len);
if (!ASSERT_OK(ret, "bpf_obj_get_info_by_fd(prog_fd)"))
return;
for (i = 0; i < prog_info.nr_map_ids; i++) {
map_fd = bpf_map_get_fd_by_id(map_ids[i]);
if (!ASSERT_GE(map_fd, 0, "bpf_map_get_fd_by_id"))
return;
len = sizeof(map_info);
memset(&map_info, 0, len);
ret = bpf_obj_get_info_by_fd(map_fd, &map_info, &len);
if (!ASSERT_OK(ret, "bpf_obj_get_info_by_fd(map_fd)")) {
close(map_fd);
return;
}
if (map_info.type == BPF_MAP_TYPE_INSN_ARRAY) {
if (!ASSERT_EQ(seen, false, "more than one INSN_ARRAY map")) {
close(map_fd);
return;
}
seen = true;
}
close(map_fd);
}
ASSERT_EQ(seen, true, "no INSN_ARRAY map");
}
static void check_one_switch(struct bpf_gotox *skel)
{
__u64 in[] = {0, 1, 2, 3, 4, 5, 77};
__u64 out[] = {2, 3, 4, 5, 7, 19, 19};
int i;
for (i = 0; i < ARRAY_SIZE(in); i++)
check_simple(skel, skel->progs.one_switch, in[i], out[i]);
}
static void check_one_switch_non_zero_sec_off(struct bpf_gotox *skel)
{
__u64 in[] = {0, 1, 2, 3, 4, 5, 77};
__u64 out[] = {2, 3, 4, 5, 7, 19, 19};
int i;
for (i = 0; i < ARRAY_SIZE(in); i++)
check_simple(skel, skel->progs.one_switch_non_zero_sec_off, in[i], out[i]);
}
static void check_two_switches(struct bpf_gotox *skel)
{
__u64 in[] = {0, 1, 2, 3, 4, 5, 77};
__u64 out[] = {103, 104, 107, 205, 115, 1019, 1019};
int i;
for (i = 0; i < ARRAY_SIZE(in); i++)
check_simple(skel, skel->progs.two_switches, in[i], out[i]);
}
static void check_big_jump_table(struct bpf_gotox *skel)
{
__u64 in[] = {0, 11, 27, 31, 22, 45, 99};
__u64 out[] = {2, 3, 4, 5, 19, 19, 19};
int i;
for (i = 0; i < ARRAY_SIZE(in); i++)
check_simple(skel, skel->progs.big_jump_table, in[i], out[i]);
}
static void check_one_jump_two_maps(struct bpf_gotox *skel)
{
__u64 in[] = {0, 1, 2, 3, 4, 5, 77};
__u64 out[] = {12, 15, 7 , 15, 12, 15, 15};
int i;
for (i = 0; i < ARRAY_SIZE(in); i++)
check_simple(skel, skel->progs.one_jump_two_maps, in[i], out[i]);
}
static void check_static_global(struct bpf_gotox *skel)
{
__u64 in[] = {0, 1, 2, 3, 4, 5, 77};
__u64 out[] = {2, 3, 4, 5, 7, 19, 19};
int i;
for (i = 0; i < ARRAY_SIZE(in); i++)
check_simple(skel, skel->progs.use_static_global1, in[i], out[i]);
for (i = 0; i < ARRAY_SIZE(in); i++)
check_simple(skel, skel->progs.use_static_global2, in[i], out[i]);
}
static void check_nonstatic_global(struct bpf_gotox *skel)
{
__u64 in[] = {0, 1, 2, 3, 4, 5, 77};
__u64 out[] = {2, 3, 4, 5, 7, 19, 19};
int i;
for (i = 0; i < ARRAY_SIZE(in); i++)
check_simple(skel, skel->progs.use_nonstatic_global1, in[i], out[i]);
for (i = 0; i < ARRAY_SIZE(in); i++)
check_simple(skel, skel->progs.use_nonstatic_global2, in[i], out[i]);
}
static void check_other_sec(struct bpf_gotox *skel)
{
struct bpf_link *link;
__u64 in[] = {0, 1, 2, 3, 4, 5, 77};
__u64 out[] = {2, 3, 4, 5, 7, 19, 19};
int i;
link = bpf_program__attach(skel->progs.simple_test_other_sec);
if (!ASSERT_OK_PTR(link, "link"))
return;
for (i = 0; i < ARRAY_SIZE(in); i++)
check_simple_fentry(skel, skel->progs.simple_test_other_sec, in[i], out[i]);
bpf_link__destroy(link);
}
static void check_static_global_other_sec(struct bpf_gotox *skel)
{
struct bpf_link *link;
__u64 in[] = {0, 1, 2, 3, 4, 5, 77};
__u64 out[] = {2, 3, 4, 5, 7, 19, 19};
int i;
link = bpf_program__attach(skel->progs.use_static_global_other_sec);
if (!ASSERT_OK_PTR(link, "link"))
return;
for (i = 0; i < ARRAY_SIZE(in); i++)
check_simple_fentry(skel, skel->progs.use_static_global_other_sec, in[i], out[i]);
bpf_link__destroy(link);
}
static void check_nonstatic_global_other_sec(struct bpf_gotox *skel)
{
struct bpf_link *link;
__u64 in[] = {0, 1, 2, 3, 4, 5, 77};
__u64 out[] = {2, 3, 4, 5, 7, 19, 19};
int i;
link = bpf_program__attach(skel->progs.use_nonstatic_global_other_sec);
if (!ASSERT_OK_PTR(link, "link"))
return;
for (i = 0; i < ARRAY_SIZE(in); i++)
check_simple_fentry(skel, skel->progs.use_nonstatic_global_other_sec, in[i], out[i]);
bpf_link__destroy(link);
}
void test_bpf_gotox(void)
{
struct bpf_gotox *skel;
int ret;
skel = bpf_gotox__open();
if (!ASSERT_NEQ(skel, NULL, "bpf_gotox__open"))
return;
ret = bpf_gotox__load(skel);
if (!ASSERT_OK(ret, "bpf_gotox__load"))
return;
skel->bss->pid = getpid();
if (test__start_subtest("one-switch"))
__subtest(skel, check_one_switch);
if (test__start_subtest("one-switch-non-zero-sec-offset"))
__subtest(skel, check_one_switch_non_zero_sec_off);
if (test__start_subtest("two-switches"))
__subtest(skel, check_two_switches);
if (test__start_subtest("big-jump-table"))
__subtest(skel, check_big_jump_table);
if (test__start_subtest("static-global"))
__subtest(skel, check_static_global);
if (test__start_subtest("nonstatic-global"))
__subtest(skel, check_nonstatic_global);
if (test__start_subtest("other-sec"))
__subtest(skel, check_other_sec);
if (test__start_subtest("static-global-other-sec"))
__subtest(skel, check_static_global_other_sec);
if (test__start_subtest("nonstatic-global-other-sec"))
__subtest(skel, check_nonstatic_global_other_sec);
if (test__start_subtest("one-jump-two-maps"))
__subtest(skel, check_one_jump_two_maps);
if (test__start_subtest("one-map-two-jumps"))
__subtest(skel, check_one_map_two_jumps);
bpf_gotox__destroy(skel);
}
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