LXR linux/tools/testing/selftests/bpf/prog_tests/l4lb

   1// SPDX-License-Identifier: GPL-2.0
   2#include <test_progs.h>
   3#include <network_helpers.h>
   4
   5static void test_l4lb(const char *file)
   6{
   7        unsigned int nr_cpus = bpf_num_possible_cpus();
   8        struct vip key = {.protocol = 6};
   9        struct vip_meta {
  10                __u32 flags;
  11                __u32 vip_num;
  12        } value = {.vip_num = VIP_NUM};
  13        __u32 stats_key = VIP_NUM;
  14        struct vip_stats {
  15                __u64 bytes;
  16                __u64 pkts;
  17        } stats[nr_cpus];
  18        struct real_definition {
  19                union {
  20                        __be32 dst;
  21                        __be32 dstv6[4];
  22                };
  23                __u8 flags;
  24        } real_def = {.dst = MAGIC_VAL};
  25        __u32 ch_key = 11, real_num = 3;
  26        __u32 duration, retval, size;
  27        int err, i, prog_fd, map_fd;
  28        __u64 bytes = 0, pkts = 0;
  29        struct bpf_object *obj;
  30        char buf[128];
  31        u32 *magic = (u32 *)buf;
  32
  33        err = bpf_prog_load(file, BPF_PROG_TYPE_SCHED_CLS, &obj, &prog_fd);
  34        if (CHECK_FAIL(err))
  35                return;
  36
  37        map_fd = bpf_find_map(__func__, obj, "vip_map");
  38        if (map_fd < 0)
  39                goto out;
  40        bpf_map_update_elem(map_fd, &key, &value, 0);
  41
  42        map_fd = bpf_find_map(__func__, obj, "ch_rings");
  43        if (map_fd < 0)
  44                goto out;
  45        bpf_map_update_elem(map_fd, &ch_key, &real_num, 0);
  46
  47        map_fd = bpf_find_map(__func__, obj, "reals");
  48        if (map_fd < 0)
  49                goto out;
  50        bpf_map_update_elem(map_fd, &real_num, &real_def, 0);
  51
  52        err = bpf_prog_test_run(prog_fd, NUM_ITER, &pkt_v4, sizeof(pkt_v4),
  53                                buf, &size, &retval, &duration);
  54        CHECK(err || retval != 7/*TC_ACT_REDIRECT*/ || size != 54 ||
  55              *magic != MAGIC_VAL, "ipv4",
  56              "err %d errno %d retval %d size %d magic %x\n",
  57              err, errno, retval, size, *magic);
  58
  59        err = bpf_prog_test_run(prog_fd, NUM_ITER, &pkt_v6, sizeof(pkt_v6),
  60                                buf, &size, &retval, &duration);
  61        CHECK(err || retval != 7/*TC_ACT_REDIRECT*/ || size != 74 ||
  62              *magic != MAGIC_VAL, "ipv6",
  63              "err %d errno %d retval %d size %d magic %x\n",
  64              err, errno, retval, size, *magic);
  65
  66        map_fd = bpf_find_map(__func__, obj, "stats");
  67        if (map_fd < 0)
  68                goto out;
  69        bpf_map_lookup_elem(map_fd, &stats_key, stats);
  70        for (i = 0; i < nr_cpus; i++) {
  71                bytes += stats[i].bytes;
  72                pkts += stats[i].pkts;
  73        }
  74        if (CHECK_FAIL(bytes != MAGIC_BYTES * NUM_ITER * 2 ||
  75                       pkts != NUM_ITER * 2))
  76                printf("test_l4lb:FAIL:stats %lld %lld\n", bytes, pkts);
  77out:
  78        bpf_object__close(obj);
  79}
  80
  81void test_l4lb_all(void)
  82{
  83        if (test__start_subtest("l4lb_inline"))
  84                test_l4lb("test_l4lb.o");
  85        if (test__start_subtest("l4lb_noinline"))
  86                test_l4lb("test_l4lb_noinline.o");
  87}
  88