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// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright 2020 Google LLC.
*/
#include <test_progs.h>
#include <cgroup_helpers.h>
#include <network_helpers.h>
#include "progs/cg_storage_multi.h"
#include "cg_storage_multi_egress_only.skel.h"
#include "cg_storage_multi_isolated.skel.h"
#include "cg_storage_multi_shared.skel.h"
#define PARENT_CGROUP "/cgroup_storage"
#define CHILD_CGROUP "/cgroup_storage/child"
static int duration;
static bool assert_storage(struct bpf_map *map, const void *key,
struct cgroup_value *expected)
{
struct cgroup_value value;
int map_fd;
map_fd = bpf_map__fd(map);
if (CHECK(bpf_map_lookup_elem(map_fd, key, &value) < 0,
"map-lookup", "errno %d", errno))
return true;
if (CHECK(memcmp(&value, expected, sizeof(struct cgroup_value)),
"assert-storage", "storages differ"))
return true;
return false;
}
static bool assert_storage_noexist(struct bpf_map *map, const void *key)
{
struct cgroup_value value;
int map_fd;
map_fd = bpf_map__fd(map);
if (CHECK(bpf_map_lookup_elem(map_fd, key, &value) == 0,
"map-lookup", "succeeded, expected ENOENT"))
return true;
if (CHECK(errno != ENOENT,
"map-lookup", "errno %d, expected ENOENT", errno))
return true;
return false;
}
static bool connect_send(const char *cgroup_path)
{
bool res = true;
int server_fd = -1, client_fd = -1;
if (join_cgroup(cgroup_path))
goto out_clean;
server_fd = start_server(AF_INET, SOCK_DGRAM, NULL, 0, 0);
if (server_fd < 0)
goto out_clean;
client_fd = connect_to_fd(server_fd, 0);
if (client_fd < 0)
goto out_clean;
if (send(client_fd, "message", strlen("message"), 0) < 0)
goto out_clean;
res = false;
out_clean:
close(client_fd);
close(server_fd);
return res;
}
static void test_egress_only(int parent_cgroup_fd, int child_cgroup_fd)
{
struct cg_storage_multi_egress_only *obj;
struct cgroup_value expected_cgroup_value;
struct bpf_cgroup_storage_key key;
struct bpf_link *parent_link = NULL, *child_link = NULL;
bool err;
key.attach_type = BPF_CGROUP_INET_EGRESS;
obj = cg_storage_multi_egress_only__open_and_load();
if (CHECK(!obj, "skel-load", "errno %d", errno))
return;
/* Attach to parent cgroup, trigger packet from child.
* Assert that there is only one run and in that run the storage is
* parent cgroup's storage.
* Also assert that child cgroup's storage does not exist
*/
parent_link = bpf_program__attach_cgroup(obj->progs.egress,
parent_cgroup_fd);
if (!ASSERT_OK_PTR(parent_link, "parent-cg-attach"))
goto close_bpf_object;
err = connect_send(CHILD_CGROUP);
if (CHECK(err, "first-connect-send", "errno %d", errno))
goto close_bpf_object;
if (CHECK(obj->bss->invocations != 1,
"first-invoke", "invocations=%d", obj->bss->invocations))
goto close_bpf_object;
key.cgroup_inode_id = get_cgroup_id(PARENT_CGROUP);
expected_cgroup_value = (struct cgroup_value) { .egress_pkts = 1 };
if (assert_storage(obj->maps.cgroup_storage,
&key, &expected_cgroup_value))
goto close_bpf_object;
key.cgroup_inode_id = get_cgroup_id(CHILD_CGROUP);
if (assert_storage_noexist(obj->maps.cgroup_storage, &key))
goto close_bpf_object;
/* Attach to parent and child cgroup, trigger packet from child.
* Assert that there are two additional runs, one that run with parent
* cgroup's storage and one with child cgroup's storage.
*/
child_link = bpf_program__attach_cgroup(obj->progs.egress,
child_cgroup_fd);
if (!ASSERT_OK_PTR(child_link, "child-cg-attach"))
goto close_bpf_object;
err = connect_send(CHILD_CGROUP);
if (CHECK(err, "second-connect-send", "errno %d", errno))
goto close_bpf_object;
if (CHECK(obj->bss->invocations != 3,
"second-invoke", "invocations=%d", obj->bss->invocations))
goto close_bpf_object;
key.cgroup_inode_id = get_cgroup_id(PARENT_CGROUP);
expected_cgroup_value = (struct cgroup_value) { .egress_pkts = 2 };
if (assert_storage(obj->maps.cgroup_storage,
&key, &expected_cgroup_value))
goto close_bpf_object;
key.cgroup_inode_id = get_cgroup_id(CHILD_CGROUP);
expected_cgroup_value = (struct cgroup_value) { .egress_pkts = 1 };
if (assert_storage(obj->maps.cgroup_storage,
&key, &expected_cgroup_value))
goto close_bpf_object;
close_bpf_object:
bpf_link__destroy(parent_link);
bpf_link__destroy(child_link);
cg_storage_multi_egress_only__destroy(obj);
}
static void test_isolated(int parent_cgroup_fd, int child_cgroup_fd)
{
struct cg_storage_multi_isolated *obj;
struct cgroup_value expected_cgroup_value;
struct bpf_cgroup_storage_key key;
struct bpf_link *parent_egress1_link = NULL, *parent_egress2_link = NULL;
struct bpf_link *child_egress1_link = NULL, *child_egress2_link = NULL;
struct bpf_link *parent_ingress_link = NULL, *child_ingress_link = NULL;
bool err;
obj = cg_storage_multi_isolated__open_and_load();
if (CHECK(!obj, "skel-load", "errno %d", errno))
return;
/* Attach to parent cgroup, trigger packet from child.
* Assert that there is three runs, two with parent cgroup egress and
* one with parent cgroup ingress, stored in separate parent storages.
* Also assert that child cgroup's storages does not exist
*/
parent_egress1_link = bpf_program__attach_cgroup(obj->progs.egress1,
parent_cgroup_fd);
if (!ASSERT_OK_PTR(parent_egress1_link, "parent-egress1-cg-attach"))
goto close_bpf_object;
parent_egress2_link = bpf_program__attach_cgroup(obj->progs.egress2,
parent_cgroup_fd);
if (!ASSERT_OK_PTR(parent_egress2_link, "parent-egress2-cg-attach"))
goto close_bpf_object;
parent_ingress_link = bpf_program__attach_cgroup(obj->progs.ingress,
parent_cgroup_fd);
if (!ASSERT_OK_PTR(parent_ingress_link, "parent-ingress-cg-attach"))
goto close_bpf_object;
err = connect_send(CHILD_CGROUP);
if (CHECK(err, "first-connect-send", "errno %d", errno))
goto close_bpf_object;
if (CHECK(obj->bss->invocations != 3,
"first-invoke", "invocations=%d", obj->bss->invocations))
goto close_bpf_object;
key.cgroup_inode_id = get_cgroup_id(PARENT_CGROUP);
key.attach_type = BPF_CGROUP_INET_EGRESS;
expected_cgroup_value = (struct cgroup_value) { .egress_pkts = 2 };
if (assert_storage(obj->maps.cgroup_storage,
&key, &expected_cgroup_value))
goto close_bpf_object;
key.attach_type = BPF_CGROUP_INET_INGRESS;
expected_cgroup_value = (struct cgroup_value) { .ingress_pkts = 1 };
if (assert_storage(obj->maps.cgroup_storage,
&key, &expected_cgroup_value))
goto close_bpf_object;
key.cgroup_inode_id = get_cgroup_id(CHILD_CGROUP);
key.attach_type = BPF_CGROUP_INET_EGRESS;
if (assert_storage_noexist(obj->maps.cgroup_storage, &key))
goto close_bpf_object;
key.attach_type = BPF_CGROUP_INET_INGRESS;
if (assert_storage_noexist(obj->maps.cgroup_storage, &key))
goto close_bpf_object;
/* Attach to parent and child cgroup, trigger packet from child.
* Assert that there is six additional runs, parent cgroup egresses and
* ingress, child cgroup egresses and ingress.
* Assert that egree and ingress storages are separate.
*/
child_egress1_link = bpf_program__attach_cgroup(obj->progs.egress1,
child_cgroup_fd);
if (!ASSERT_OK_PTR(child_egress1_link, "child-egress1-cg-attach"))
goto close_bpf_object;
child_egress2_link = bpf_program__attach_cgroup(obj->progs.egress2,
child_cgroup_fd);
if (!ASSERT_OK_PTR(child_egress2_link, "child-egress2-cg-attach"))
goto close_bpf_object;
child_ingress_link = bpf_program__attach_cgroup(obj->progs.ingress,
child_cgroup_fd);
if (!ASSERT_OK_PTR(child_ingress_link, "child-ingress-cg-attach"))
goto close_bpf_object;
err = connect_send(CHILD_CGROUP);
if (CHECK(err, "second-connect-send", "errno %d", errno))
goto close_bpf_object;
if (CHECK(obj->bss->invocations != 9,
"second-invoke", "invocations=%d", obj->bss->invocations))
goto close_bpf_object;
key.cgroup_inode_id = get_cgroup_id(PARENT_CGROUP);
key.attach_type = BPF_CGROUP_INET_EGRESS;
expected_cgroup_value = (struct cgroup_value) { .egress_pkts = 4 };
if (assert_storage(obj->maps.cgroup_storage,
&key, &expected_cgroup_value))
goto close_bpf_object;
key.attach_type = BPF_CGROUP_INET_INGRESS;
expected_cgroup_value = (struct cgroup_value) { .ingress_pkts = 2 };
if (assert_storage(obj->maps.cgroup_storage,
&key, &expected_cgroup_value))
goto close_bpf_object;
key.cgroup_inode_id = get_cgroup_id(CHILD_CGROUP);
key.attach_type = BPF_CGROUP_INET_EGRESS;
expected_cgroup_value = (struct cgroup_value) { .egress_pkts = 2 };
if (assert_storage(obj->maps.cgroup_storage,
&key, &expected_cgroup_value))
goto close_bpf_object;
key.attach_type = BPF_CGROUP_INET_INGRESS;
expected_cgroup_value = (struct cgroup_value) { .ingress_pkts = 1 };
if (assert_storage(obj->maps.cgroup_storage,
&key, &expected_cgroup_value))
goto close_bpf_object;
close_bpf_object:
bpf_link__destroy(parent_egress1_link);
bpf_link__destroy(parent_egress2_link);
bpf_link__destroy(parent_ingress_link);
bpf_link__destroy(child_egress1_link);
bpf_link__destroy(child_egress2_link);
bpf_link__destroy(child_ingress_link);
cg_storage_multi_isolated__destroy(obj);
}
static void test_shared(int parent_cgroup_fd, int child_cgroup_fd)
{
struct cg_storage_multi_shared *obj;
struct cgroup_value expected_cgroup_value;
__u64 key;
struct bpf_link *parent_egress1_link = NULL, *parent_egress2_link = NULL;
struct bpf_link *child_egress1_link = NULL, *child_egress2_link = NULL;
struct bpf_link *parent_ingress_link = NULL, *child_ingress_link = NULL;
bool err;
obj = cg_storage_multi_shared__open_and_load();
if (CHECK(!obj, "skel-load", "errno %d", errno))
return;
/* Attach to parent cgroup, trigger packet from child.
* Assert that there is three runs, two with parent cgroup egress and
* one with parent cgroup ingress.
* Also assert that child cgroup's storage does not exist
*/
parent_egress1_link = bpf_program__attach_cgroup(obj->progs.egress1,
parent_cgroup_fd);
if (!ASSERT_OK_PTR(parent_egress1_link, "parent-egress1-cg-attach"))
goto close_bpf_object;
parent_egress2_link = bpf_program__attach_cgroup(obj->progs.egress2,
parent_cgroup_fd);
if (!ASSERT_OK_PTR(parent_egress2_link, "parent-egress2-cg-attach"))
goto close_bpf_object;
parent_ingress_link = bpf_program__attach_cgroup(obj->progs.ingress,
parent_cgroup_fd);
if (!ASSERT_OK_PTR(parent_ingress_link, "parent-ingress-cg-attach"))
goto close_bpf_object;
err = connect_send(CHILD_CGROUP);
if (CHECK(err, "first-connect-send", "errno %d", errno))
goto close_bpf_object;
if (CHECK(obj->bss->invocations != 3,
"first-invoke", "invocations=%d", obj->bss->invocations))
goto close_bpf_object;
key = get_cgroup_id(PARENT_CGROUP);
expected_cgroup_value = (struct cgroup_value) {
.egress_pkts = 2,
.ingress_pkts = 1,
};
if (assert_storage(obj->maps.cgroup_storage,
&key, &expected_cgroup_value))
goto close_bpf_object;
key = get_cgroup_id(CHILD_CGROUP);
if (assert_storage_noexist(obj->maps.cgroup_storage, &key))
goto close_bpf_object;
/* Attach to parent and child cgroup, trigger packet from child.
* Assert that there is six additional runs, parent cgroup egresses and
* ingress, child cgroup egresses and ingress.
*/
child_egress1_link = bpf_program__attach_cgroup(obj->progs.egress1,
child_cgroup_fd);
if (!ASSERT_OK_PTR(child_egress1_link, "child-egress1-cg-attach"))
goto close_bpf_object;
child_egress2_link = bpf_program__attach_cgroup(obj->progs.egress2,
child_cgroup_fd);
if (!ASSERT_OK_PTR(child_egress2_link, "child-egress2-cg-attach"))
goto close_bpf_object;
child_ingress_link = bpf_program__attach_cgroup(obj->progs.ingress,
child_cgroup_fd);
if (!ASSERT_OK_PTR(child_ingress_link, "child-ingress-cg-attach"))
goto close_bpf_object;
err = connect_send(CHILD_CGROUP);
if (CHECK(err, "second-connect-send", "errno %d", errno))
goto close_bpf_object;
if (CHECK(obj->bss->invocations != 9,
"second-invoke", "invocations=%d", obj->bss->invocations))
goto close_bpf_object;
key = get_cgroup_id(PARENT_CGROUP);
expected_cgroup_value = (struct cgroup_value) {
.egress_pkts = 4,
.ingress_pkts = 2,
};
if (assert_storage(obj->maps.cgroup_storage,
&key, &expected_cgroup_value))
goto close_bpf_object;
key = get_cgroup_id(CHILD_CGROUP);
expected_cgroup_value = (struct cgroup_value) {
.egress_pkts = 2,
.ingress_pkts = 1,
};
if (assert_storage(obj->maps.cgroup_storage,
&key, &expected_cgroup_value))
goto close_bpf_object;
close_bpf_object:
bpf_link__destroy(parent_egress1_link);
bpf_link__destroy(parent_egress2_link);
bpf_link__destroy(parent_ingress_link);
bpf_link__destroy(child_egress1_link);
bpf_link__destroy(child_egress2_link);
bpf_link__destroy(child_ingress_link);
cg_storage_multi_shared__destroy(obj);
}
void test_cg_storage_multi(void)
{
int parent_cgroup_fd = -1, child_cgroup_fd = -1;
parent_cgroup_fd = test__join_cgroup(PARENT_CGROUP);
if (CHECK(parent_cgroup_fd < 0, "cg-create-parent", "errno %d", errno))
goto close_cgroup_fd;
child_cgroup_fd = create_and_get_cgroup(CHILD_CGROUP);
if (CHECK(child_cgroup_fd < 0, "cg-create-child", "errno %d", errno))
goto close_cgroup_fd;
if (test__start_subtest("egress_only"))
test_egress_only(parent_cgroup_fd, child_cgroup_fd);
if (test__start_subtest("isolated"))
test_isolated(parent_cgroup_fd, child_cgroup_fd);
if (test__start_subtest("shared"))
test_shared(parent_cgroup_fd, child_cgroup_fd);
close_cgroup_fd:
close(child_cgroup_fd);
close(parent_cgroup_fd);
}
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