#include <test_progs.h>
#include "cgroup_helpers.h"
#include "percpu_alloc_array.skel.h"
#include "percpu_alloc_cgrp_local_storage.skel.h"
#include "percpu_alloc_fail.skel.h"
static void test_array(void)
{
struct percpu_alloc_array *skel;
int err, prog_fd;
LIBBPF_OPTS(bpf_test_run_opts, topts);
skel = percpu_alloc_array__open();
if (!ASSERT_OK_PTR(skel, "percpu_alloc_array__open"))
return;
bpf_program__set_autoload(skel->progs.test_array_map_1, true);
bpf_program__set_autoload(skel->progs.test_array_map_2, true);
bpf_program__set_autoload(skel->progs.test_array_map_3, true);
bpf_program__set_autoload(skel->progs.test_array_map_4, true);
skel->bss->my_pid = getpid();
skel->rodata->nr_cpus = libbpf_num_possible_cpus();
err = percpu_alloc_array__load(skel);
if (!ASSERT_OK(err, "percpu_alloc_array__load"))
goto out;
err = percpu_alloc_array__attach(skel);
if (!ASSERT_OK(err, "percpu_alloc_array__attach"))
goto out;
prog_fd = bpf_program__fd(skel->progs.test_array_map_1);
err = bpf_prog_test_run_opts(prog_fd, &topts);
ASSERT_OK(err, "test_run array_map 1-4");
ASSERT_EQ(topts.retval, 0, "test_run array_map 1-4");
ASSERT_EQ(skel->bss->cpu0_field_d, 2, "cpu0_field_d");
ASSERT_EQ(skel->bss->sum_field_c, 1, "sum_field_c");
out:
percpu_alloc_array__destroy(skel);
}
static void test_array_sleepable(void)
{
struct percpu_alloc_array *skel;
int err, prog_fd;
LIBBPF_OPTS(bpf_test_run_opts, topts);
skel = percpu_alloc_array__open();
if (!ASSERT_OK_PTR(skel, "percpu_alloc__open"))
return;
bpf_program__set_autoload(skel->progs.test_array_map_10, true);
skel->bss->my_pid = getpid();
skel->rodata->nr_cpus = libbpf_num_possible_cpus();
err = percpu_alloc_array__load(skel);
if (!ASSERT_OK(err, "percpu_alloc_array__load"))
goto out;
err = percpu_alloc_array__attach(skel);
if (!ASSERT_OK(err, "percpu_alloc_array__attach"))
goto out;
prog_fd = bpf_program__fd(skel->progs.test_array_map_10);
err = bpf_prog_test_run_opts(prog_fd, &topts);
ASSERT_OK(err, "test_run array_map_10");
ASSERT_EQ(topts.retval, 0, "test_run array_map_10");
ASSERT_EQ(skel->bss->cpu0_field_d, 2, "cpu0_field_d");
ASSERT_EQ(skel->bss->sum_field_c, 1, "sum_field_c");
out:
percpu_alloc_array__destroy(skel);
}
static void test_cgrp_local_storage(void)
{
struct percpu_alloc_cgrp_local_storage *skel;
int err, cgroup_fd, prog_fd;
LIBBPF_OPTS(bpf_test_run_opts, topts);
cgroup_fd = test__join_cgroup("/percpu_alloc");
if (!ASSERT_GE(cgroup_fd, 0, "join_cgroup /percpu_alloc"))
return;
skel = percpu_alloc_cgrp_local_storage__open();
if (!ASSERT_OK_PTR(skel, "percpu_alloc_cgrp_local_storage__open"))
goto close_fd;
skel->bss->my_pid = getpid();
skel->rodata->nr_cpus = libbpf_num_possible_cpus();
err = percpu_alloc_cgrp_local_storage__load(skel);
if (!ASSERT_OK(err, "percpu_alloc_cgrp_local_storage__load"))
goto destroy_skel;
err = percpu_alloc_cgrp_local_storage__attach(skel);
if (!ASSERT_OK(err, "percpu_alloc_cgrp_local_storage__attach"))
goto destroy_skel;
prog_fd = bpf_program__fd(skel->progs.test_cgrp_local_storage_1);
err = bpf_prog_test_run_opts(prog_fd, &topts);
ASSERT_OK(err, "test_run cgrp_local_storage 1-3");
ASSERT_EQ(topts.retval, 0, "test_run cgrp_local_storage 1-3");
ASSERT_EQ(skel->bss->cpu0_field_d, 2, "cpu0_field_d");
ASSERT_EQ(skel->bss->sum_field_c, 1, "sum_field_c");
destroy_skel:
percpu_alloc_cgrp_local_storage__destroy(skel);
close_fd:
close(cgroup_fd);
}
static void test_failure(void) {
RUN_TESTS(percpu_alloc_fail);
}
static void test_percpu_map_op_cpu_flag(struct bpf_map *map, void *keys, size_t key_sz, u32 entries,
int nr_cpus, bool test_batch)
{
size_t value_sz = sizeof(u32), value_sz_cpus, value_sz_total;
u32 *values = NULL, *values_percpu = NULL;
const u32 value = 0xDEADC0DE;
int i, j, cpu, map_fd, err;
u64 batch = 0, flags;
void *values_row;
u32 count, v;
LIBBPF_OPTS(bpf_map_batch_opts, batch_opts);
value_sz_cpus = value_sz * nr_cpus;
values = calloc(entries, value_sz_cpus);
if (!ASSERT_OK_PTR(values, "calloc values"))
return;
values_percpu = calloc(entries, roundup(value_sz, 8) * nr_cpus);
if (!ASSERT_OK_PTR(values_percpu, "calloc values_percpu")) {
free(values);
return;
}
value_sz_total = value_sz_cpus * entries;
memset(values, 0, value_sz_total);
map_fd = bpf_map__fd(map);
flags = BPF_F_CPU | BPF_F_ALL_CPUS;
err = bpf_map_lookup_elem_flags(map_fd, keys, values, flags);
if (!ASSERT_ERR(err, "bpf_map_lookup_elem_flags cpu|all_cpus"))
goto out;
err = bpf_map_update_elem(map_fd, keys, values, flags);
if (!ASSERT_ERR(err, "bpf_map_update_elem cpu|all_cpus"))
goto out;
flags = BPF_F_ALL_CPUS;
err = bpf_map_lookup_elem_flags(map_fd, keys, values, flags);
if (!ASSERT_ERR(err, "bpf_map_lookup_elem_flags all_cpus"))
goto out;
flags = BPF_F_LOCK | BPF_F_CPU;
err = bpf_map_lookup_elem_flags(map_fd, keys, values, flags);
if (!ASSERT_ERR(err, "bpf_map_lookup_elem_flags BPF_F_LOCK"))
goto out;
flags = BPF_F_LOCK | BPF_F_ALL_CPUS;
err = bpf_map_update_elem(map_fd, keys, values, flags);
if (!ASSERT_ERR(err, "bpf_map_update_elem BPF_F_LOCK"))
goto out;
flags = (u64)nr_cpus << 32 | BPF_F_CPU;
err = bpf_map_update_elem(map_fd, keys, values, flags);
if (!ASSERT_EQ(err, -ERANGE, "bpf_map_update_elem -ERANGE"))
goto out;
err = bpf_map__update_elem(map, keys, key_sz, values, value_sz, flags);
if (!ASSERT_EQ(err, -ERANGE, "bpf_map__update_elem -ERANGE"))
goto out;
err = bpf_map_lookup_elem_flags(map_fd, keys, values, flags);
if (!ASSERT_EQ(err, -ERANGE, "bpf_map_lookup_elem_flags -ERANGE"))
goto out;
err = bpf_map__lookup_elem(map, keys, key_sz, values, value_sz, flags);
if (!ASSERT_EQ(err, -ERANGE, "bpf_map__lookup_elem -ERANGE"))
goto out;
for (cpu = 0; cpu < nr_cpus; cpu++) {
values[0] = 0;
flags = BPF_F_ALL_CPUS;
for (i = 0; i < entries; i++) {
err = bpf_map__update_elem(map, keys + i * key_sz, key_sz, values,
value_sz, flags);
if (!ASSERT_OK(err, "bpf_map__update_elem all_cpus"))
goto out;
}
for (i = 0; i < entries; i++) {
values[0] = value;
flags = (u64)cpu << 32 | BPF_F_CPU;
err = bpf_map__update_elem(map, keys + i * key_sz, key_sz, values,
value_sz, flags);
if (!ASSERT_OK(err, "bpf_map__update_elem specified cpu"))
goto out;
for (j = 0; j < nr_cpus; j++) {
flags = (u64)j << 32 | BPF_F_CPU;
err = bpf_map__lookup_elem(map, keys + i * key_sz, key_sz, values,
value_sz, flags);
if (!ASSERT_OK(err, "bpf_map__lookup_elem specified cpu"))
goto out;
if (!ASSERT_EQ(values[0], j != cpu ? 0 : value,
"bpf_map__lookup_elem value on specified cpu"))
goto out;
}
}
}
if (!test_batch)
goto out;
count = entries;
batch_opts.elem_flags = (u64)nr_cpus << 32 | BPF_F_CPU;
err = bpf_map_update_batch(map_fd, keys, values, &count, &batch_opts);
if (!ASSERT_EQ(err, -ERANGE, "bpf_map_update_batch -ERANGE"))
goto out;
for (cpu = 0; cpu < nr_cpus; cpu++) {
memset(values, 0, value_sz_total);
count = entries;
batch_opts.elem_flags = BPF_F_ALL_CPUS;
err = bpf_map_update_batch(map_fd, keys, values, &count, &batch_opts);
if (!ASSERT_OK(err, "bpf_map_update_batch all_cpus"))
goto out;
if (!ASSERT_EQ(count, entries, "bpf_map_update_batch count"))
goto out;
for (i = 0; i < entries; i++)
values[i] = value;
count = entries;
batch_opts.elem_flags = (u64)cpu << 32 | BPF_F_CPU;
err = bpf_map_update_batch(map_fd, keys, values, &count, &batch_opts);
if (!ASSERT_OK(err, "bpf_map_update_batch specified cpu"))
goto out;
if (!ASSERT_EQ(count, entries, "bpf_map_update_batch count"))
goto out;
batch = 0;
count = entries;
memset(values, 0, entries * value_sz);
err = bpf_map_lookup_batch(map_fd, NULL, &batch, keys, values, &count, &batch_opts);
if (!ASSERT_TRUE(!err || err == -ENOENT, "bpf_map_lookup_batch specified cpu"))
goto out;
if (!ASSERT_EQ(count, entries, "bpf_map_lookup_batch count"))
goto out;
for (i = 0; i < entries; i++)
if (!ASSERT_EQ(values[i], value,
"bpf_map_lookup_batch value on specified cpu"))
goto out;
batch = 0;
count = entries;
batch_opts.elem_flags = 0;
memset(values_percpu, 0, roundup(value_sz, 8) * nr_cpus * entries);
err = bpf_map_lookup_batch(map_fd, NULL, &batch, keys, values_percpu, &count,
&batch_opts);
if (!ASSERT_TRUE(!err || err == -ENOENT, "bpf_map_lookup_batch all_cpus"))
goto out;
if (!ASSERT_EQ(count, entries, "bpf_map_lookup_batch count"))
goto out;
for (i = 0; i < entries; i++) {
values_row = (void *) values_percpu +
roundup(value_sz, 8) * i * nr_cpus;
for (j = 0; j < nr_cpus; j++) {
v = *(u32 *) (values_row + roundup(value_sz, 8) * j);
if (!ASSERT_EQ(v, j != cpu ? 0 : value,
"bpf_map_lookup_batch value all_cpus"))
goto out;
}
}
}
out:
free(values_percpu);
free(values);
}
static void test_percpu_map_cpu_flag(enum bpf_map_type map_type)
{
struct percpu_alloc_array *skel;
size_t key_sz = sizeof(int);
int *keys, nr_cpus, i, err;
struct bpf_map *map;
u32 max_entries;
nr_cpus = libbpf_num_possible_cpus();
if (!ASSERT_GT(nr_cpus, 0, "libbpf_num_possible_cpus"))
return;
max_entries = nr_cpus * 2;
keys = calloc(max_entries, key_sz);
if (!ASSERT_OK_PTR(keys, "calloc keys"))
return;
for (i = 0; i < max_entries; i++)
keys[i] = i;
skel = percpu_alloc_array__open();
if (!ASSERT_OK_PTR(skel, "percpu_alloc_array__open")) {
free(keys);
return;
}
map = skel->maps.percpu;
bpf_map__set_type(map, map_type);
bpf_map__set_max_entries(map, max_entries);
err = percpu_alloc_array__load(skel);
if (!ASSERT_OK(err, "test_percpu_alloc__load"))
goto out;
test_percpu_map_op_cpu_flag(map, keys, key_sz, nr_cpus, nr_cpus, true);
out:
percpu_alloc_array__destroy(skel);
free(keys);
}
static void test_percpu_array_cpu_flag(void)
{
test_percpu_map_cpu_flag(BPF_MAP_TYPE_PERCPU_ARRAY);
}
static void test_percpu_hash_cpu_flag(void)
{
test_percpu_map_cpu_flag(BPF_MAP_TYPE_PERCPU_HASH);
}
static void test_lru_percpu_hash_cpu_flag(void)
{
test_percpu_map_cpu_flag(BPF_MAP_TYPE_LRU_PERCPU_HASH);
}
static void test_percpu_cgroup_storage_cpu_flag(void)
{
struct percpu_alloc_array *skel = NULL;
struct bpf_cgroup_storage_key key;
int cgroup, prog_fd, nr_cpus, err;
struct bpf_map *map;
nr_cpus = libbpf_num_possible_cpus();
if (!ASSERT_GT(nr_cpus, 0, "libbpf_num_possible_cpus"))
return;
err = setup_cgroup_environment();
if (!ASSERT_OK(err, "setup_cgroup_environment"))
return;
cgroup = create_and_get_cgroup("/cg_percpu");
if (!ASSERT_GE(cgroup, 0, "create_and_get_cgroup")) {
cleanup_cgroup_environment();
return;
}
err = join_cgroup("/cg_percpu");
if (!ASSERT_OK(err, "join_cgroup"))
goto out;
skel = percpu_alloc_array__open_and_load();
if (!ASSERT_OK_PTR(skel, "percpu_alloc_array__open_and_load"))
goto out;
prog_fd = bpf_program__fd(skel->progs.cgroup_egress);
err = bpf_prog_attach(prog_fd, cgroup, BPF_CGROUP_INET_EGRESS, 0);
if (!ASSERT_OK(err, "bpf_prog_attach"))
goto out;
map = skel->maps.percpu_cgroup_storage;
err = bpf_map_get_next_key(bpf_map__fd(map), NULL, &key);
if (!ASSERT_OK(err, "bpf_map_get_next_key"))
goto out;
test_percpu_map_op_cpu_flag(map, &key, sizeof(key), 1, nr_cpus, false);
out:
bpf_prog_detach2(-1, cgroup, BPF_CGROUP_INET_EGRESS);
close(cgroup);
cleanup_cgroup_environment();
percpu_alloc_array__destroy(skel);
}
static void test_map_op_cpu_flag(enum bpf_map_type map_type)
{
u32 max_entries = 1, count = max_entries;
u64 flags, batch = 0, val = 0;
int err, map_fd, key = 0;
LIBBPF_OPTS(bpf_map_batch_opts, batch_opts);
map_fd = bpf_map_create(map_type, "test_cpu_flag", sizeof(int), sizeof(u64), max_entries,
NULL);
if (!ASSERT_GE(map_fd, 0, "bpf_map_create"))
return;
flags = BPF_F_ALL_CPUS;
err = bpf_map_update_elem(map_fd, &key, &val, flags);
ASSERT_ERR(err, "bpf_map_update_elem all_cpus");
batch_opts.elem_flags = BPF_F_ALL_CPUS;
err = bpf_map_update_batch(map_fd, &key, &val, &count, &batch_opts);
ASSERT_ERR(err, "bpf_map_update_batch all_cpus");
flags = BPF_F_CPU;
err = bpf_map_lookup_elem_flags(map_fd, &key, &val, flags);
ASSERT_ERR(err, "bpf_map_lookup_elem_flags cpu");
batch_opts.elem_flags = BPF_F_CPU;
err = bpf_map_lookup_batch(map_fd, NULL, &batch, &key, &val, &count, &batch_opts);
ASSERT_ERR(err, "bpf_map_lookup_batch cpu");
close(map_fd);
}
static void test_array_cpu_flag(void)
{
test_map_op_cpu_flag(BPF_MAP_TYPE_ARRAY);
}
static void test_hash_cpu_flag(void)
{
test_map_op_cpu_flag(BPF_MAP_TYPE_HASH);
}
void test_percpu_alloc(void)
{
if (test__start_subtest("array"))
test_array();
if (test__start_subtest("array_sleepable"))
test_array_sleepable();
if (test__start_subtest("cgrp_local_storage"))
test_cgrp_local_storage();
if (test__start_subtest("failure_tests"))
test_failure();
if (test__start_subtest("cpu_flag_percpu_array"))
test_percpu_array_cpu_flag();
if (test__start_subtest("cpu_flag_percpu_hash"))
test_percpu_hash_cpu_flag();
if (test__start_subtest("cpu_flag_lru_percpu_hash"))
test_lru_percpu_hash_cpu_flag();
if (test__start_subtest("cpu_flag_percpu_cgroup_storage"))
test_percpu_cgroup_storage_cpu_flag();
if (test__start_subtest("cpu_flag_array"))
test_array_cpu_flag();
if (test__start_subtest("cpu_flag_hash"))
test_hash_cpu_flag();
}
