summaryrefslogtreecommitdiff
path: root/tools/testing/selftests/bpf/prog_tests/hashmap.c
blob: 428d488830c672b4f44fb6c8eda5f11b0ade9158 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
// SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause)

/*
 * Tests for libbpf's hashmap.
 *
 * Copyright (c) 2019 Facebook
 */
#include "test_progs.h"
#include "bpf/hashmap.h"

static int duration = 0;

static size_t hash_fn(const void *k, void *ctx)
{
	return (long)k;
}

static bool equal_fn(const void *a, const void *b, void *ctx)
{
	return (long)a == (long)b;
}

static inline size_t next_pow_2(size_t n)
{
	size_t r = 1;

	while (r < n)
		r <<= 1;
	return r;
}

static inline size_t exp_cap(size_t sz)
{
	size_t r = next_pow_2(sz);

	if (sz * 4 / 3 > r)
		r <<= 1;
	return r;
}

#define ELEM_CNT 62

static void test_hashmap_generic(void)
{
	struct hashmap_entry *entry, *tmp;
	int err, bkt, found_cnt, i;
	long long found_msk;
	struct hashmap *map;

	map = hashmap__new(hash_fn, equal_fn, NULL);
	if (CHECK(IS_ERR(map), "hashmap__new",
		  "failed to create map: %ld\n", PTR_ERR(map)))
		return;

	for (i = 0; i < ELEM_CNT; i++) {
		const void *oldk, *k = (const void *)(long)i;
		void *oldv, *v = (void *)(long)(1024 + i);

		err = hashmap__update(map, k, v, &oldk, &oldv);
		if (CHECK(err != -ENOENT, "hashmap__update",
			  "unexpected result: %d\n", err))
			goto cleanup;

		if (i % 2) {
			err = hashmap__add(map, k, v);
		} else {
			err = hashmap__set(map, k, v, &oldk, &oldv);
			if (CHECK(oldk != NULL || oldv != NULL, "check_kv",
				  "unexpected k/v: %p=%p\n", oldk, oldv))
				goto cleanup;
		}

		if (CHECK(err, "elem_add", "failed to add k/v %ld = %ld: %d\n",
			       (long)k, (long)v, err))
			goto cleanup;

		if (CHECK(!hashmap__find(map, k, &oldv), "elem_find",
			  "failed to find key %ld\n", (long)k))
			goto cleanup;
		if (CHECK(oldv != v, "elem_val",
			  "found value is wrong: %ld\n", (long)oldv))
			goto cleanup;
	}

	if (CHECK(hashmap__size(map) != ELEM_CNT, "hashmap__size",
		  "invalid map size: %zu\n", hashmap__size(map)))
		goto cleanup;
	if (CHECK(hashmap__capacity(map) != exp_cap(hashmap__size(map)),
		  "hashmap_cap",
		  "unexpected map capacity: %zu\n", hashmap__capacity(map)))
		goto cleanup;

	found_msk = 0;
	hashmap__for_each_entry(map, entry, bkt) {
		long k = (long)entry->key;
		long v = (long)entry->value;

		found_msk |= 1ULL << k;
		if (CHECK(v - k != 1024, "check_kv",
			  "invalid k/v pair: %ld = %ld\n", k, v))
			goto cleanup;
	}
	if (CHECK(found_msk != (1ULL << ELEM_CNT) - 1, "elem_cnt",
		  "not all keys iterated: %llx\n", found_msk))
		goto cleanup;

	for (i = 0; i < ELEM_CNT; i++) {
		const void *oldk, *k = (const void *)(long)i;
		void *oldv, *v = (void *)(long)(256 + i);

		err = hashmap__add(map, k, v);
		if (CHECK(err != -EEXIST, "hashmap__add",
			  "unexpected add result: %d\n", err))
			goto cleanup;

		if (i % 2)
			err = hashmap__update(map, k, v, &oldk, &oldv);
		else
			err = hashmap__set(map, k, v, &oldk, &oldv);

		if (CHECK(err, "elem_upd",
			  "failed to update k/v %ld = %ld: %d\n",
			  (long)k, (long)v, err))
			goto cleanup;
		if (CHECK(!hashmap__find(map, k, &oldv), "elem_find",
			  "failed to find key %ld\n", (long)k))
			goto cleanup;
		if (CHECK(oldv != v, "elem_val",
			  "found value is wrong: %ld\n", (long)oldv))
			goto cleanup;
	}

	if (CHECK(hashmap__size(map) != ELEM_CNT, "hashmap__size",
		  "invalid updated map size: %zu\n", hashmap__size(map)))
		goto cleanup;
	if (CHECK(hashmap__capacity(map) != exp_cap(hashmap__size(map)),
		  "hashmap__capacity",
		  "unexpected map capacity: %zu\n", hashmap__capacity(map)))
		goto cleanup;

	found_msk = 0;
	hashmap__for_each_entry_safe(map, entry, tmp, bkt) {
		long k = (long)entry->key;
		long v = (long)entry->value;

		found_msk |= 1ULL << k;
		if (CHECK(v - k != 256, "elem_check",
			  "invalid updated k/v pair: %ld = %ld\n", k, v))
			goto cleanup;
	}
	if (CHECK(found_msk != (1ULL << ELEM_CNT) - 1, "elem_cnt",
		  "not all keys iterated after update: %llx\n", found_msk))
		goto cleanup;

	found_cnt = 0;
	hashmap__for_each_key_entry(map, entry, (void *)0) {
		found_cnt++;
	}
	if (CHECK(!found_cnt, "found_cnt",
		  "didn't find any entries for key 0\n"))
		goto cleanup;

	found_msk = 0;
	found_cnt = 0;
	hashmap__for_each_key_entry_safe(map, entry, tmp, (void *)0) {
		const void *oldk, *k;
		void *oldv, *v;

		k = entry->key;
		v = entry->value;

		found_cnt++;
		found_msk |= 1ULL << (long)k;

		if (CHECK(!hashmap__delete(map, k, &oldk, &oldv), "elem_del",
			  "failed to delete k/v %ld = %ld\n",
			  (long)k, (long)v))
			goto cleanup;
		if (CHECK(oldk != k || oldv != v, "check_old",
			  "invalid deleted k/v: expected %ld = %ld, got %ld = %ld\n",
			  (long)k, (long)v, (long)oldk, (long)oldv))
			goto cleanup;
		if (CHECK(hashmap__delete(map, k, &oldk, &oldv), "elem_del",
			  "unexpectedly deleted k/v %ld = %ld\n",
			  (long)oldk, (long)oldv))
			goto cleanup;
	}

	if (CHECK(!found_cnt || !found_msk, "found_entries",
		  "didn't delete any key entries\n"))
		goto cleanup;
	if (CHECK(hashmap__size(map) != ELEM_CNT - found_cnt, "elem_cnt",
		  "invalid updated map size (already deleted: %d): %zu\n",
		  found_cnt, hashmap__size(map)))
		goto cleanup;
	if (CHECK(hashmap__capacity(map) != exp_cap(hashmap__size(map)),
		  "hashmap__capacity",
		  "unexpected map capacity: %zu\n", hashmap__capacity(map)))
		goto cleanup;

	hashmap__for_each_entry_safe(map, entry, tmp, bkt) {
		const void *oldk, *k;
		void *oldv, *v;

		k = entry->key;
		v = entry->value;

		found_cnt++;
		found_msk |= 1ULL << (long)k;

		if (CHECK(!hashmap__delete(map, k, &oldk, &oldv), "elem_del",
			  "failed to delete k/v %ld = %ld\n",
			  (long)k, (long)v))
			goto cleanup;
		if (CHECK(oldk != k || oldv != v, "elem_check",
			  "invalid old k/v: expect %ld = %ld, got %ld = %ld\n",
			  (long)k, (long)v, (long)oldk, (long)oldv))
			goto cleanup;
		if (CHECK(hashmap__delete(map, k, &oldk, &oldv), "elem_del",
			  "unexpectedly deleted k/v %ld = %ld\n",
			  (long)k, (long)v))
			goto cleanup;
	}

	if (CHECK(found_cnt != ELEM_CNT || found_msk != (1ULL << ELEM_CNT) - 1,
		  "found_cnt",
		  "not all keys were deleted: found_cnt:%d, found_msk:%llx\n",
		  found_cnt, found_msk))
		goto cleanup;
	if (CHECK(hashmap__size(map) != 0, "hashmap__size",
		  "invalid updated map size (already deleted: %d): %zu\n",
		  found_cnt, hashmap__size(map)))
		goto cleanup;

	found_cnt = 0;
	hashmap__for_each_entry(map, entry, bkt) {
		CHECK(false, "elem_exists",
		      "unexpected map entries left: %ld = %ld\n",
		      (long)entry->key, (long)entry->value);
		goto cleanup;
	}

	hashmap__clear(map);
	hashmap__for_each_entry(map, entry, bkt) {
		CHECK(false, "elem_exists",
		      "unexpected map entries left: %ld = %ld\n",
		      (long)entry->key, (long)entry->value);
		goto cleanup;
	}

cleanup:
	hashmap__free(map);
}

static size_t collision_hash_fn(const void *k, void *ctx)
{
	return 0;
}

static void test_hashmap_multimap(void)
{
	void *k1 = (void *)0, *k2 = (void *)1;
	struct hashmap_entry *entry;
	struct hashmap *map;
	long found_msk;
	int err, bkt;

	/* force collisions */
	map = hashmap__new(collision_hash_fn, equal_fn, NULL);
	if (CHECK(IS_ERR(map), "hashmap__new",
		  "failed to create map: %ld\n", PTR_ERR(map)))
		return;

	/* set up multimap:
	 * [0] -> 1, 2, 4;
	 * [1] -> 8, 16, 32;
	 */
	err = hashmap__append(map, k1, (void *)1);
	if (CHECK(err, "elem_add", "failed to add k/v: %d\n", err))
		goto cleanup;
	err = hashmap__append(map, k1, (void *)2);
	if (CHECK(err, "elem_add", "failed to add k/v: %d\n", err))
		goto cleanup;
	err = hashmap__append(map, k1, (void *)4);
	if (CHECK(err, "elem_add", "failed to add k/v: %d\n", err))
		goto cleanup;

	err = hashmap__append(map, k2, (void *)8);
	if (CHECK(err, "elem_add", "failed to add k/v: %d\n", err))
		goto cleanup;
	err = hashmap__append(map, k2, (void *)16);
	if (CHECK(err, "elem_add", "failed to add k/v: %d\n", err))
		goto cleanup;
	err = hashmap__append(map, k2, (void *)32);
	if (CHECK(err, "elem_add", "failed to add k/v: %d\n", err))
		goto cleanup;

	if (CHECK(hashmap__size(map) != 6, "hashmap_size",
		  "invalid map size: %zu\n", hashmap__size(map)))
		goto cleanup;

	/* verify global iteration still works and sees all values */
	found_msk = 0;
	hashmap__for_each_entry(map, entry, bkt) {
		found_msk |= (long)entry->value;
	}
	if (CHECK(found_msk != (1 << 6) - 1, "found_msk",
		  "not all keys iterated: %lx\n", found_msk))
		goto cleanup;

	/* iterate values for key 1 */
	found_msk = 0;
	hashmap__for_each_key_entry(map, entry, k1) {
		found_msk |= (long)entry->value;
	}
	if (CHECK(found_msk != (1 | 2 | 4), "found_msk",
		  "invalid k1 values: %lx\n", found_msk))
		goto cleanup;

	/* iterate values for key 2 */
	found_msk = 0;
	hashmap__for_each_key_entry(map, entry, k2) {
		found_msk |= (long)entry->value;
	}
	if (CHECK(found_msk != (8 | 16 | 32), "found_msk",
		  "invalid k2 values: %lx\n", found_msk))
		goto cleanup;

cleanup:
	hashmap__free(map);
}

static void test_hashmap_empty()
{
	struct hashmap_entry *entry;
	int bkt;
	struct hashmap *map;
	void *k = (void *)0;

	/* force collisions */
	map = hashmap__new(hash_fn, equal_fn, NULL);
	if (CHECK(IS_ERR(map), "hashmap__new",
		  "failed to create map: %ld\n", PTR_ERR(map)))
		goto cleanup;

	if (CHECK(hashmap__size(map) != 0, "hashmap__size",
		  "invalid map size: %zu\n", hashmap__size(map)))
		goto cleanup;
	if (CHECK(hashmap__capacity(map) != 0, "hashmap__capacity",
		  "invalid map capacity: %zu\n", hashmap__capacity(map)))
		goto cleanup;
	if (CHECK(hashmap__find(map, k, NULL), "elem_find",
		  "unexpected find\n"))
		goto cleanup;
	if (CHECK(hashmap__delete(map, k, NULL, NULL), "elem_del",
		  "unexpected delete\n"))
		goto cleanup;

	hashmap__for_each_entry(map, entry, bkt) {
		CHECK(false, "elem_found", "unexpected iterated entry\n");
		goto cleanup;
	}
	hashmap__for_each_key_entry(map, entry, k) {
		CHECK(false, "key_found", "unexpected key entry\n");
		goto cleanup;
	}

cleanup:
	hashmap__free(map);
}

void test_hashmap()
{
	if (test__start_subtest("generic"))
		test_hashmap_generic();
	if (test__start_subtest("multimap"))
		test_hashmap_multimap();
	if (test__start_subtest("empty"))
		test_hashmap_empty();
}