samples/bpf/map_perf_test_kern.c

   1 /* Copyright (c) 2016 Facebook
   2  *
   3  * This program is free software; you can redistribute it and/or
   4  * modify it under the terms of version 2 of the GNU General Public
   5  * License as published by the Free Software Foundation.
   6  */
   7 #include <linux/skbuff.h>
   8 #include <linux/netdevice.h>
   9 #include <linux/version.h>
  10 #include <uapi/linux/bpf.h>
  11 #include "bpf_helpers.h"
  12
  13 #define MAX_ENTRIES 1000
  14 #define MAX_NR_CPUS 1024
  15
  16 struct bpf_map_def SEC("maps") hash_map = {
  17         .type = BPF_MAP_TYPE_HASH,
  18         .key_size = sizeof(u32),
  19         .value_size = sizeof(long),
  20         .max_entries = MAX_ENTRIES,
  21 };
  22
  23 struct bpf_map_def SEC("maps") lru_hash_map = {
  24         .type = BPF_MAP_TYPE_LRU_HASH,
  25         .key_size = sizeof(u32),
  26         .value_size = sizeof(long),
  27         .max_entries = 10000,
  28 };
  29
  30 struct bpf_map_def SEC("maps") nocommon_lru_hash_map = {
  31         .type = BPF_MAP_TYPE_LRU_HASH,
  32         .key_size = sizeof(u32),
  33         .value_size = sizeof(long),
  34         .max_entries = 10000,
  35         .map_flags = BPF_F_NO_COMMON_LRU,
  36 };
  37
  38 struct bpf_map_def SEC("maps") inner_lru_hash_map = {
  39         .type = BPF_MAP_TYPE_LRU_HASH,
  40         .key_size = sizeof(u32),
  41         .value_size = sizeof(long),
  42         .max_entries = MAX_ENTRIES,
  43 };
  44
  45 struct bpf_map_def SEC("maps") array_of_lru_hashs = {
  46         .type = BPF_MAP_TYPE_ARRAY_OF_MAPS,
  47         .key_size = sizeof(u32),
  48         .max_entries = MAX_NR_CPUS,
  49 };
  50
  51 struct bpf_map_def SEC("maps") percpu_hash_map = {
  52         .type = BPF_MAP_TYPE_PERCPU_HASH,
  53         .key_size = sizeof(u32),
  54         .value_size = sizeof(long),
  55         .max_entries = MAX_ENTRIES,
  56 };
  57
  58 struct bpf_map_def SEC("maps") hash_map_alloc = {
  59         .type = BPF_MAP_TYPE_HASH,
  60         .key_size = sizeof(u32),
  61         .value_size = sizeof(long),
  62         .max_entries = MAX_ENTRIES,
  63         .map_flags = BPF_F_NO_PREALLOC,
  64 };
  65
  66 struct bpf_map_def SEC("maps") percpu_hash_map_alloc = {
  67         .type = BPF_MAP_TYPE_PERCPU_HASH,
  68         .key_size = sizeof(u32),
  69         .value_size = sizeof(long),
  70         .max_entries = MAX_ENTRIES,
  71         .map_flags = BPF_F_NO_PREALLOC,
  72 };
  73
  74 struct bpf_map_def SEC("maps") lpm_trie_map_alloc = {
  75         .type = BPF_MAP_TYPE_LPM_TRIE,
  76         .key_size = 8,
  77         .value_size = sizeof(long),
  78         .max_entries = 10000,
  79         .map_flags = BPF_F_NO_PREALLOC,
  80 };
  81
  82 struct bpf_map_def SEC("maps") array_map = {
  83         .type = BPF_MAP_TYPE_ARRAY,
  84         .key_size = sizeof(u32),
  85         .value_size = sizeof(long),
  86         .max_entries = MAX_ENTRIES,
  87 };
  88
  89 SEC("kprobe/sys_getuid")
  90 int stress_hmap(struct pt_regs *ctx)
  91 {
  92         u32 key = bpf_get_current_pid_tgid();
  93         long init_val = 1;
  94         long *value;
  95
  96         bpf_map_update_elem(&hash_map, &key, &init_val, BPF_ANY);
  97         value = bpf_map_lookup_elem(&hash_map, &key);
  98         if (value)
  99                 bpf_map_delete_elem(&hash_map, &key);
 100
 101         return 0;
 102 }
 103
 104 SEC("kprobe/sys_geteuid")
 105 int stress_percpu_hmap(struct pt_regs *ctx)
 106 {
 107         u32 key = bpf_get_current_pid_tgid();
 108         long init_val = 1;
 109         long *value;
 110
 111         bpf_map_update_elem(&percpu_hash_map, &key, &init_val, BPF_ANY);
 112         value = bpf_map_lookup_elem(&percpu_hash_map, &key);
 113         if (value)
 114                 bpf_map_delete_elem(&percpu_hash_map, &key);
 115         return 0;
 116 }
 117
 118 SEC("kprobe/sys_getgid")
 119 int stress_hmap_alloc(struct pt_regs *ctx)
 120 {
 121         u32 key = bpf_get_current_pid_tgid();
 122         long init_val = 1;
 123         long *value;
 124
 125         bpf_map_update_elem(&hash_map_alloc, &key, &init_val, BPF_ANY);
 126         value = bpf_map_lookup_elem(&hash_map_alloc, &key);
 127         if (value)
 128                 bpf_map_delete_elem(&hash_map_alloc, &key);
 129         return 0;
 130 }
 131
 132 SEC("kprobe/sys_getegid")
 133 int stress_percpu_hmap_alloc(struct pt_regs *ctx)
 134 {
 135         u32 key = bpf_get_current_pid_tgid();
 136         long init_val = 1;
 137         long *value;
 138
 139         bpf_map_update_elem(&percpu_hash_map_alloc, &key, &init_val, BPF_ANY);
 140         value = bpf_map_lookup_elem(&percpu_hash_map_alloc, &key);
 141         if (value)
 142                 bpf_map_delete_elem(&percpu_hash_map_alloc, &key);
 143         return 0;
 144 }
 145
 146 SEC("kprobe/sys_connect")
 147 int stress_lru_hmap_alloc(struct pt_regs *ctx)
 148 {
 149         struct sockaddr_in6 *in6;
 150         u16 test_case, dst6[8];
 151         int addrlen, ret;
 152         char fmt[] = "Failed at stress_lru_hmap_alloc. ret:%d\n";
 153         long val = 1;
 154         u32 key = bpf_get_prandom_u32();
 155
 156         in6 = (struct sockaddr_in6 *)PT_REGS_PARM2(ctx);
 157         addrlen = (int)PT_REGS_PARM3(ctx);
 158
 159         if (addrlen != sizeof(*in6))
 160                 return 0;
 161
 162         ret = bpf_probe_read(dst6, sizeof(dst6), &in6->sin6_addr);
 163         if (ret)
 164                 goto done;
 165
 166         if (dst6[0] != 0xdead || dst6[1] != 0xbeef)
 167                 return 0;
 168
 169         test_case = dst6[7];
 170
 171         if (test_case == 0) {
 172                 ret = bpf_map_update_elem(&lru_hash_map, &key, &val, BPF_ANY);
 173         } else if (test_case == 1) {
 174                 ret = bpf_map_update_elem(&nocommon_lru_hash_map, &key, &val,
 175                                           BPF_ANY);
 176         } else if (test_case == 2) {
 177                 void *nolocal_lru_map;
 178                 int cpu = bpf_get_smp_processor_id();
 179
 180                 nolocal_lru_map = bpf_map_lookup_elem(&array_of_lru_hashs,
 181                                                       &cpu);
 182                 if (!nolocal_lru_map) {
 183                         ret = -ENOENT;
 184                         goto done;
 185                 }
 186
 187                 ret = bpf_map_update_elem(nolocal_lru_map, &key, &val,
 188                                           BPF_ANY);
 189         } else {
 190                 ret = -EINVAL;
 191         }
 192
 193 done:
 194         if (ret)
 195                 bpf_trace_printk(fmt, sizeof(fmt), ret);
 196
 197         return 0;
 198 }
 199
 200 SEC("kprobe/sys_gettid")
 201 int stress_lpm_trie_map_alloc(struct pt_regs *ctx)
 202 {
 203         union {
 204                 u32 b32[2];
 205                 u8 b8[8];
 206         } key;
 207         unsigned int i;
 208
 209         key.b32[0] = 32;
 210         key.b8[4] = 192;
 211         key.b8[5] = 168;
 212         key.b8[6] = 0;
 213         key.b8[7] = 1;
 214
 215 #pragma clang loop unroll(full)
 216         for (i = 0; i < 32; ++i)
 217                 bpf_map_lookup_elem(&lpm_trie_map_alloc, &key);
 218
 219         return 0;
 220 }
 221
 222 SEC("kprobe/sys_getpgid")
 223 int stress_hash_map_lookup(struct pt_regs *ctx)
 224 {
 225         u32 key = 1, i;
 226         long *value;
 227
 228 #pragma clang loop unroll(full)
 229         for (i = 0; i < 64; ++i)
 230                 value = bpf_map_lookup_elem(&hash_map, &key);
 231
 232         return 0;
 233 }
 234
 235 SEC("kprobe/sys_getpgrp")
 236 int stress_array_map_lookup(struct pt_regs *ctx)
 237 {
 238         u32 key = 1, i;
 239         long *value;
 240
 241 #pragma clang loop unroll(full)
 242         for (i = 0; i < 64; ++i)
 243                 value = bpf_map_lookup_elem(&array_map, &key);
 244
 245         return 0;
 246 }
 247
 248 char _license[] SEC("license") = "GPL";
 249 u32 _version SEC("version") = LINUX_VERSION_CODE;