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