83 lines · c
1// SPDX-License-Identifier: GPL-2.02 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 than58 * 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 packets73 * 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