1// SPDX-License-Identifier: GPL-2.0
2
3#include <sys/sysinfo.h>
4#include <test_progs.h>
5#include "network_helpers.h"
6#include "netcnt_prog.skel.h"
7#include "netcnt_common.h"
8
9#define CG_NAME "/netcnt"
10
11void serial_test_netcnt(void)
12{
13	union percpu_net_cnt *percpu_netcnt = NULL;
14	struct bpf_cgroup_storage_key key;
15	int map_fd, percpu_map_fd;
16	struct netcnt_prog *skel;
17	unsigned long packets;
18	union net_cnt netcnt;
19	unsigned long bytes;
20	int cpu, nproc;
21	int cg_fd = -1;
22	char cmd[128];
23
24	skel = netcnt_prog__open_and_load();
25	if (!ASSERT_OK_PTR(skel, "netcnt_prog__open_and_load"))
26		return;
27
28	nproc = bpf_num_possible_cpus();
29	percpu_netcnt = malloc(sizeof(*percpu_netcnt) * nproc);
30	if (!ASSERT_OK_PTR(percpu_netcnt, "malloc(percpu_netcnt)"))
31		goto err;
32
33	cg_fd = test__join_cgroup(CG_NAME);
34	if (!ASSERT_GE(cg_fd, 0, "test__join_cgroup"))
35		goto err;
36
37	skel->links.bpf_nextcnt = bpf_program__attach_cgroup(skel->progs.bpf_nextcnt, cg_fd);
38	if (!ASSERT_OK_PTR(skel->links.bpf_nextcnt,
39			   "attach_cgroup(bpf_nextcnt)"))
40		goto err;
41
42	snprintf(cmd, sizeof(cmd), "%s ::1 -A -c 10000 -q > /dev/null", ping_command(AF_INET6));
43	ASSERT_OK(system(cmd), cmd);
44
45	map_fd = bpf_map__fd(skel->maps.netcnt);
46	if (!ASSERT_OK(bpf_map_get_next_key(map_fd, NULL, &key), "bpf_map_get_next_key"))
47		goto err;
48
49	if (!ASSERT_OK(bpf_map_lookup_elem(map_fd, &key, &netcnt), "bpf_map_lookup_elem(netcnt)"))
50		goto err;
51
52	percpu_map_fd = bpf_map__fd(skel->maps.percpu_netcnt);
53	if (!ASSERT_OK(bpf_map_lookup_elem(percpu_map_fd, &key, &percpu_netcnt[0]),
54		       "bpf_map_lookup_elem(percpu_netcnt)"))
55		goto err;
56
57	/* Some packets can be still in per-cpu cache, but not more than
58	 * MAX_PERCPU_PACKETS.
59	 */
60	packets = netcnt.packets;
61	bytes = netcnt.bytes;
62	for (cpu = 0; cpu < nproc; cpu++) {
63		ASSERT_LE(percpu_netcnt[cpu].packets, MAX_PERCPU_PACKETS, "MAX_PERCPU_PACKETS");
64
65		packets += percpu_netcnt[cpu].packets;
66		bytes += percpu_netcnt[cpu].bytes;
67	}
68
69	/* No packets should be lost */
70	ASSERT_GE(packets, 10000, "packets");
71
72	/* Let's check that bytes counter matches the number of packets
73	 * multiplied by the size of ipv6 ICMP packet.
74	 */
75	ASSERT_GE(bytes, packets * 104, "bytes");
76
77err:
78	if (cg_fd != -1)
79		close(cg_fd);
80	free(percpu_netcnt);
81	netcnt_prog__destroy(skel);
82}
83