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// SPDX-License-Identifier: GPL-2.0
#include <sys/sysinfo.h>
#include <test_progs.h>
#include "network_helpers.h"
#include "netcnt_prog.skel.h"
#include "netcnt_common.h"
#define CG_NAME "/netcnt"
void test_netcnt(void)
{
union percpu_net_cnt *percpu_netcnt = NULL;
struct bpf_cgroup_storage_key key;
int map_fd, percpu_map_fd;
struct netcnt_prog *skel;
unsigned long packets;
union net_cnt netcnt;
unsigned long bytes;
int cpu, nproc;
int cg_fd = -1;
char cmd[128];
skel = netcnt_prog__open_and_load();
if (!ASSERT_OK_PTR(skel, "netcnt_prog__open_and_load"))
return;
nproc = get_nprocs_conf();
percpu_netcnt = malloc(sizeof(*percpu_netcnt) * nproc);
if (!ASSERT_OK_PTR(percpu_netcnt, "malloc(percpu_netcnt)"))
goto err;
cg_fd = test__join_cgroup(CG_NAME);
if (!ASSERT_GE(cg_fd, 0, "test__join_cgroup"))
goto err;
skel->links.bpf_nextcnt = bpf_program__attach_cgroup(skel->progs.bpf_nextcnt, cg_fd);
if (!ASSERT_OK_PTR(skel->links.bpf_nextcnt,
"attach_cgroup(bpf_nextcnt)"))
goto err;
snprintf(cmd, sizeof(cmd), "%s ::1 -A -c 10000 -q > /dev/null", ping_command(AF_INET6));
ASSERT_OK(system(cmd), cmd);
map_fd = bpf_map__fd(skel->maps.netcnt);
if (!ASSERT_OK(bpf_map_get_next_key(map_fd, NULL, &key), "bpf_map_get_next_key"))
goto err;
if (!ASSERT_OK(bpf_map_lookup_elem(map_fd, &key, &netcnt), "bpf_map_lookup_elem(netcnt)"))
goto err;
percpu_map_fd = bpf_map__fd(skel->maps.percpu_netcnt);
if (!ASSERT_OK(bpf_map_lookup_elem(percpu_map_fd, &key, &percpu_netcnt[0]),
"bpf_map_lookup_elem(percpu_netcnt)"))
goto err;
/* Some packets can be still in per-cpu cache, but not more than
* MAX_PERCPU_PACKETS.
*/
packets = netcnt.packets;
bytes = netcnt.bytes;
for (cpu = 0; cpu < nproc; cpu++) {
ASSERT_LE(percpu_netcnt[cpu].packets, MAX_PERCPU_PACKETS, "MAX_PERCPU_PACKETS");
packets += percpu_netcnt[cpu].packets;
bytes += percpu_netcnt[cpu].bytes;
}
/* No packets should be lost */
ASSERT_EQ(packets, 10000, "packets");
/* Let's check that bytes counter matches the number of packets
* multiplied by the size of ipv6 ICMP packet.
*/
ASSERT_EQ(bytes, packets * 104, "bytes");
err:
if (cg_fd != -1)
close(cg_fd);
free(percpu_netcnt);
netcnt_prog__destroy(skel);
}
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