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// 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 (!ASSERT_OK_PTR(map, "hashmap__new"))
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 (!ASSERT_OK_PTR(map, "hashmap__new"))
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 (!ASSERT_OK_PTR(map, "hashmap__new"))
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();
}
|
