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

   1// SPDX-License-Identifier: GPL-2.0
   2#include <test_progs.h>
   3
   4static void test_l4lb(const char *file)
   5{
   6        unsigned int nr_cpus = bpf_num_possible_cpus();
   7        struct vip key = {.protocol = 6};
   8        struct vip_meta {
   9                __u32 flags;
  10                __u32 vip_num;
  11        } value = {.vip_num = VIP_NUM};
  12        __u32 stats_key = VIP_NUM;
  13        struct vip_stats {
  14                __u64 bytes;
  15                __u64 pkts;
  16        } stats[nr_cpus];
  17        struct real_definition {
  18                union {
  19                        __be32 dst;
  20                        __be32 dstv6[4];
  21                };
  22                __u8 flags;
  23        } real_def = {.dst = MAGIC_VAL};
  24        __u32 ch_key = 11, real_num = 3;
  25        __u32 duration, retval, size;
  26        int err, i, prog_fd, map_fd;
  27        __u64 bytes = 0, pkts = 0;
  28        struct bpf_object *obj;
  29        char buf[128];
  30        u32 *magic = (u32 *)buf;
  31
  32        err = bpf_prog_load(file, BPF_PROG_TYPE_SCHED_CLS, &obj, &prog_fd);
  33        if (CHECK_FAIL(err))
  34                return;
  35
  36        map_fd = bpf_find_map(__func__, obj, "vip_map");
  37        if (map_fd < 0)
  38                goto out;
  39        bpf_map_update_elem(map_fd, &key, &value, 0);
  40
  41        map_fd = bpf_find_map(__func__, obj, "ch_rings");
  42        if (map_fd < 0)
  43                goto out;
  44        bpf_map_update_elem(map_fd, &ch_key, &real_num, 0);
  45
  46        map_fd = bpf_find_map(__func__, obj, "reals");
  47        if (map_fd < 0)
  48                goto out;
  49        bpf_map_update_elem(map_fd, &real_num, &real_def, 0);
  50
  51        err = bpf_prog_test_run(prog_fd, NUM_ITER, &pkt_v4, sizeof(pkt_v4),
  52                                buf, &size, &retval, &duration);
  53        CHECK(err || retval != 7/*TC_ACT_REDIRECT*/ || size != 54 ||
  54              *magic != MAGIC_VAL, "ipv4",
  55              "err %d errno %d retval %d size %d magic %x\n",
  56              err, errno, retval, size, *magic);
  57
  58        err = bpf_prog_test_run(prog_fd, NUM_ITER, &pkt_v6, sizeof(pkt_v6),
  59                                buf, &size, &retval, &duration);
  60        CHECK(err || retval != 7/*TC_ACT_REDIRECT*/ || size != 74 ||
  61              *magic != MAGIC_VAL, "ipv6",
  62              "err %d errno %d retval %d size %d magic %x\n",
  63              err, errno, retval, size, *magic);
  64
  65        map_fd = bpf_find_map(__func__, obj, "stats");
  66        if (map_fd < 0)
  67                goto out;
  68        bpf_map_lookup_elem(map_fd, &stats_key, stats);
  69        for (i = 0; i < nr_cpus; i++) {
  70                bytes += stats[i].bytes;
  71                pkts += stats[i].pkts;
  72        }
  73        if (CHECK_FAIL(bytes != MAGIC_BYTES * NUM_ITER * 2 ||
  74                       pkts != NUM_ITER * 2))
  75                printf("test_l4lb:FAIL:stats %lld %lld\n", bytes, pkts);
  76out:
  77        bpf_object__close(obj);
  78}
  79
  80void test_l4lb_all(void)
  81{
  82        const char *file1 = "./test_l4lb.o";
  83        const char *file2 = "./test_l4lb_noinline.o";
  84
  85        test_l4lb(file1);
  86        test_l4lb(file2);
  87}
  88