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
11 void 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
77 err:
78 if (cg_fd != -1)
79 close(cg_fd);
80 free(percpu_netcnt);
81 netcnt_prog__destroy(skel);
82 }
83
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