mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
synced 2024-12-29 17:22:07 +00:00
lib/hashtable_test.c: add test for the hashtable structure
Add a KUnit test for the kernel hashtable implementation in include/linux/hashtable.h. Note that this version does not yet test each of the rcu alternative versions of functions. Signed-off-by: Rae Moar <rmoar@google.com> Reviewed-by: David Gow <davidgow@google.com> Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
This commit is contained in:
Rae Moar
Shuah Khan
parent
9ecc9cdd16
commit
789538c61f
@ -2497,6 +2497,19 @@ config LIST_KUNIT_TEST
|
||||
|
||||
If unsure, say N.
|
||||
|
||||
config HASHTABLE_KUNIT_TEST
|
||||
tristate "KUnit Test for Kernel Hashtable structures" if !KUNIT_ALL_TESTS
|
||||
depends on KUNIT
|
||||
default KUNIT_ALL_TESTS
|
||||
help
|
||||
This builds the hashtable KUnit test suite.
|
||||
It tests the basic functionality of the API defined in
|
||||
include/linux/hashtable.h. For more information on KUnit and
|
||||
unit tests in general please refer to the KUnit documentation
|
||||
in Documentation/dev-tools/kunit/.
|
||||
|
||||
If unsure, say N.
|
||||
|
||||
config LINEAR_RANGES_TEST
|
||||
tristate "KUnit test for linear_ranges"
|
||||
depends on KUNIT
|
||||
|
||||
@ -377,6 +377,7 @@ obj-$(CONFIG_PLDMFW) += pldmfw/
|
||||
CFLAGS_bitfield_kunit.o := $(DISABLE_STRUCTLEAK_PLUGIN)
|
||||
obj-$(CONFIG_BITFIELD_KUNIT) += bitfield_kunit.o
|
||||
obj-$(CONFIG_LIST_KUNIT_TEST) += list-test.o
|
||||
obj-$(CONFIG_HASHTABLE_KUNIT_TEST) += hashtable_test.o
|
||||
obj-$(CONFIG_LINEAR_RANGES_TEST) += test_linear_ranges.o
|
||||
obj-$(CONFIG_BITS_TEST) += test_bits.o
|
||||
obj-$(CONFIG_CMDLINE_KUNIT_TEST) += cmdline_kunit.o
|
||||
|
||||
317
lib/hashtable_test.c
Normal file
317
lib/hashtable_test.c
Normal file
@ -0,0 +1,317 @@
|
||||
// SPDX-License-Identifier: GPL-2.0
|
||||
/*
|
||||
* KUnit test for the Kernel Hashtable structures.
|
||||
*
|
||||
* Copyright (C) 2022, Google LLC.
|
||||
* Author: Rae Moar <rmoar@google.com>
|
||||
*/
|
||||
#include <kunit/test.h>
|
||||
|
||||
#include <linux/hashtable.h>
|
||||
|
||||
struct hashtable_test_entry {
|
||||
int key;
|
||||
int data;
|
||||
struct hlist_node node;
|
||||
int visited;
|
||||
};
|
||||
|
||||
static void hashtable_test_hash_init(struct kunit *test)
|
||||
{
|
||||
/* Test the different ways of initialising a hashtable. */
|
||||
DEFINE_HASHTABLE(hash1, 2);
|
||||
DECLARE_HASHTABLE(hash2, 3);
|
||||
|
||||
/* When using DECLARE_HASHTABLE, must use hash_init to
|
||||
* initialize the hashtable.
|
||||
*/
|
||||
hash_init(hash2);
|
||||
|
||||
KUNIT_EXPECT_TRUE(test, hash_empty(hash1));
|
||||
KUNIT_EXPECT_TRUE(test, hash_empty(hash2));
|
||||
}
|
||||
|
||||
static void hashtable_test_hash_empty(struct kunit *test)
|
||||
{
|
||||
struct hashtable_test_entry a;
|
||||
DEFINE_HASHTABLE(hash, 1);
|
||||
|
||||
KUNIT_EXPECT_TRUE(test, hash_empty(hash));
|
||||
|
||||
a.key = 1;
|
||||
a.data = 13;
|
||||
hash_add(hash, &a.node, a.key);
|
||||
|
||||
/* Hashtable should no longer be empty. */
|
||||
KUNIT_EXPECT_FALSE(test, hash_empty(hash));
|
||||
}
|
||||
|
||||
static void hashtable_test_hash_hashed(struct kunit *test)
|
||||
{
|
||||
struct hashtable_test_entry a, b;
|
||||
DEFINE_HASHTABLE(hash, 4);
|
||||
|
||||
a.key = 1;
|
||||
a.data = 13;
|
||||
hash_add(hash, &a.node, a.key);
|
||||
b.key = 1;
|
||||
b.data = 2;
|
||||
hash_add(hash, &b.node, b.key);
|
||||
|
||||
KUNIT_EXPECT_TRUE(test, hash_hashed(&a.node));
|
||||
KUNIT_EXPECT_TRUE(test, hash_hashed(&b.node));
|
||||
}
|
||||
|
||||
static void hashtable_test_hash_add(struct kunit *test)
|
||||
{
|
||||
struct hashtable_test_entry a, b, *x;
|
||||
int bkt;
|
||||
DEFINE_HASHTABLE(hash, 3);
|
||||
|
||||
a.key = 1;
|
||||
a.data = 13;
|
||||
a.visited = 0;
|
||||
hash_add(hash, &a.node, a.key);
|
||||
b.key = 2;
|
||||
b.data = 10;
|
||||
b.visited = 0;
|
||||
hash_add(hash, &b.node, b.key);
|
||||
|
||||
hash_for_each(hash, bkt, x, node) {
|
||||
x->visited++;
|
||||
if (x->key == a.key)
|
||||
KUNIT_EXPECT_EQ(test, x->data, 13);
|
||||
else if (x->key == b.key)
|
||||
KUNIT_EXPECT_EQ(test, x->data, 10);
|
||||
else
|
||||
KUNIT_FAIL(test, "Unexpected key in hashtable.");
|
||||
}
|
||||
|
||||
/* Both entries should have been visited exactly once. */
|
||||
KUNIT_EXPECT_EQ(test, a.visited, 1);
|
||||
KUNIT_EXPECT_EQ(test, b.visited, 1);
|
||||
}
|
||||
|
||||
static void hashtable_test_hash_del(struct kunit *test)
|
||||
{
|
||||
struct hashtable_test_entry a, b, *x;
|
||||
DEFINE_HASHTABLE(hash, 6);
|
||||
|
||||
a.key = 1;
|
||||
a.data = 13;
|
||||
hash_add(hash, &a.node, a.key);
|
||||
b.key = 2;
|
||||
b.data = 10;
|
||||
b.visited = 0;
|
||||
hash_add(hash, &b.node, b.key);
|
||||
|
||||
hash_del(&b.node);
|
||||
hash_for_each_possible(hash, x, node, b.key) {
|
||||
x->visited++;
|
||||
KUNIT_EXPECT_NE(test, x->key, b.key);
|
||||
}
|
||||
|
||||
/* The deleted entry should not have been visited. */
|
||||
KUNIT_EXPECT_EQ(test, b.visited, 0);
|
||||
|
||||
hash_del(&a.node);
|
||||
|
||||
/* The hashtable should be empty. */
|
||||
KUNIT_EXPECT_TRUE(test, hash_empty(hash));
|
||||
}
|
||||
|
||||
static void hashtable_test_hash_for_each(struct kunit *test)
|
||||
{
|
||||
struct hashtable_test_entry entries[3];
|
||||
struct hashtable_test_entry *x;
|
||||
int bkt, i, j, count;
|
||||
DEFINE_HASHTABLE(hash, 3);
|
||||
|
||||
/* Add three entries to the hashtable. */
|
||||
for (i = 0; i < 3; i++) {
|
||||
entries[i].key = i;
|
||||
entries[i].data = i + 10;
|
||||
entries[i].visited = 0;
|
||||
hash_add(hash, &entries[i].node, entries[i].key);
|
||||
}
|
||||
|
||||
count = 0;
|
||||
hash_for_each(hash, bkt, x, node) {
|
||||
x->visited += 1;
|
||||
KUNIT_ASSERT_GE_MSG(test, x->key, 0, "Unexpected key in hashtable.");
|
||||
KUNIT_ASSERT_LT_MSG(test, x->key, 3, "Unexpected key in hashtable.");
|
||||
count++;
|
||||
}
|
||||
|
||||
/* Should have visited each entry exactly once. */
|
||||
KUNIT_EXPECT_EQ(test, count, 3);
|
||||
for (j = 0; j < 3; j++)
|
||||
KUNIT_EXPECT_EQ(test, entries[j].visited, 1);
|
||||
}
|
||||
|
||||
static void hashtable_test_hash_for_each_safe(struct kunit *test)
|
||||
{
|
||||
struct hashtable_test_entry entries[3];
|
||||
struct hashtable_test_entry *x;
|
||||
struct hlist_node *tmp;
|
||||
int bkt, i, j, count;
|
||||
DEFINE_HASHTABLE(hash, 3);
|
||||
|
||||
/* Add three entries to the hashtable. */
|
||||
for (i = 0; i < 3; i++) {
|
||||
entries[i].key = i;
|
||||
entries[i].data = i + 10;
|
||||
entries[i].visited = 0;
|
||||
hash_add(hash, &entries[i].node, entries[i].key);
|
||||
}
|
||||
|
||||
count = 0;
|
||||
hash_for_each_safe(hash, bkt, tmp, x, node) {
|
||||
x->visited += 1;
|
||||
KUNIT_ASSERT_GE_MSG(test, x->key, 0, "Unexpected key in hashtable.");
|
||||
KUNIT_ASSERT_LT_MSG(test, x->key, 3, "Unexpected key in hashtable.");
|
||||
count++;
|
||||
|
||||
/* Delete entry during loop. */
|
||||
hash_del(&x->node);
|
||||
}
|
||||
|
||||
/* Should have visited each entry exactly once. */
|
||||
KUNIT_EXPECT_EQ(test, count, 3);
|
||||
for (j = 0; j < 3; j++)
|
||||
KUNIT_EXPECT_EQ(test, entries[j].visited, 1);
|
||||
}
|
||||
|
||||
static void hashtable_test_hash_for_each_possible(struct kunit *test)
|
||||
{
|
||||
struct hashtable_test_entry entries[4];
|
||||
struct hashtable_test_entry *x, *y;
|
||||
int buckets[2];
|
||||
int bkt, i, j, count;
|
||||
DEFINE_HASHTABLE(hash, 5);
|
||||
|
||||
/* Add three entries with key = 0 to the hashtable. */
|
||||
for (i = 0; i < 3; i++) {
|
||||
entries[i].key = 0;
|
||||
entries[i].data = i;
|
||||
entries[i].visited = 0;
|
||||
hash_add(hash, &entries[i].node, entries[i].key);
|
||||
}
|
||||
|
||||
/* Add an entry with key = 1. */
|
||||
entries[3].key = 1;
|
||||
entries[3].data = 3;
|
||||
entries[3].visited = 0;
|
||||
hash_add(hash, &entries[3].node, entries[3].key);
|
||||
|
||||
count = 0;
|
||||
hash_for_each_possible(hash, x, node, 0) {
|
||||
x->visited += 1;
|
||||
KUNIT_ASSERT_GE_MSG(test, x->data, 0, "Unexpected data in hashtable.");
|
||||
KUNIT_ASSERT_LT_MSG(test, x->data, 4, "Unexpected data in hashtable.");
|
||||
count++;
|
||||
}
|
||||
|
||||
/* Should have visited each entry with key = 0 exactly once. */
|
||||
for (j = 0; j < 3; j++)
|
||||
KUNIT_EXPECT_EQ(test, entries[j].visited, 1);
|
||||
|
||||
/* Save the buckets for the different keys. */
|
||||
hash_for_each(hash, bkt, y, node) {
|
||||
KUNIT_ASSERT_GE_MSG(test, y->key, 0, "Unexpected key in hashtable.");
|
||||
KUNIT_ASSERT_LE_MSG(test, y->key, 1, "Unexpected key in hashtable.");
|
||||
buckets[y->key] = bkt;
|
||||
}
|
||||
|
||||
/* If entry with key = 1 is in the same bucket as the entries with
|
||||
* key = 0, check it was visited. Otherwise ensure that only three
|
||||
* entries were visited.
|
||||
*/
|
||||
if (buckets[0] == buckets[1]) {
|
||||
KUNIT_EXPECT_EQ(test, count, 4);
|
||||
KUNIT_EXPECT_EQ(test, entries[3].visited, 1);
|
||||
} else {
|
||||
KUNIT_EXPECT_EQ(test, count, 3);
|
||||
KUNIT_EXPECT_EQ(test, entries[3].visited, 0);
|
||||
}
|
||||
}
|
||||
|
||||
static void hashtable_test_hash_for_each_possible_safe(struct kunit *test)
|
||||
{
|
||||
struct hashtable_test_entry entries[4];
|
||||
struct hashtable_test_entry *x, *y;
|
||||
struct hlist_node *tmp;
|
||||
int buckets[2];
|
||||
int bkt, i, j, count;
|
||||
DEFINE_HASHTABLE(hash, 5);
|
||||
|
||||
/* Add three entries with key = 0 to the hashtable. */
|
||||
for (i = 0; i < 3; i++) {
|
||||
entries[i].key = 0;
|
||||
entries[i].data = i;
|
||||
entries[i].visited = 0;
|
||||
hash_add(hash, &entries[i].node, entries[i].key);
|
||||
}
|
||||
|
||||
/* Add an entry with key = 1. */
|
||||
entries[3].key = 1;
|
||||
entries[3].data = 3;
|
||||
entries[3].visited = 0;
|
||||
hash_add(hash, &entries[3].node, entries[3].key);
|
||||
|
||||
count = 0;
|
||||
hash_for_each_possible_safe(hash, x, tmp, node, 0) {
|
||||
x->visited += 1;
|
||||
KUNIT_ASSERT_GE_MSG(test, x->data, 0, "Unexpected data in hashtable.");
|
||||
KUNIT_ASSERT_LT_MSG(test, x->data, 4, "Unexpected data in hashtable.");
|
||||
count++;
|
||||
|
||||
/* Delete entry during loop. */
|
||||
hash_del(&x->node);
|
||||
}
|
||||
|
||||
/* Should have visited each entry with key = 0 exactly once. */
|
||||
for (j = 0; j < 3; j++)
|
||||
KUNIT_EXPECT_EQ(test, entries[j].visited, 1);
|
||||
|
||||
/* Save the buckets for the different keys. */
|
||||
hash_for_each(hash, bkt, y, node) {
|
||||
KUNIT_ASSERT_GE_MSG(test, y->key, 0, "Unexpected key in hashtable.");
|
||||
KUNIT_ASSERT_LE_MSG(test, y->key, 1, "Unexpected key in hashtable.");
|
||||
buckets[y->key] = bkt;
|
||||
}
|
||||
|
||||
/* If entry with key = 1 is in the same bucket as the entries with
|
||||
* key = 0, check it was visited. Otherwise ensure that only three
|
||||
* entries were visited.
|
||||
*/
|
||||
if (buckets[0] == buckets[1]) {
|
||||
KUNIT_EXPECT_EQ(test, count, 4);
|
||||
KUNIT_EXPECT_EQ(test, entries[3].visited, 1);
|
||||
} else {
|
||||
KUNIT_EXPECT_EQ(test, count, 3);
|
||||
KUNIT_EXPECT_EQ(test, entries[3].visited, 0);
|
||||
}
|
||||
}
|
||||
|
||||
static struct kunit_case hashtable_test_cases[] = {
|
||||
KUNIT_CASE(hashtable_test_hash_init),
|
||||
KUNIT_CASE(hashtable_test_hash_empty),
|
||||
KUNIT_CASE(hashtable_test_hash_hashed),
|
||||
KUNIT_CASE(hashtable_test_hash_add),
|
||||
KUNIT_CASE(hashtable_test_hash_del),
|
||||
KUNIT_CASE(hashtable_test_hash_for_each),
|
||||
KUNIT_CASE(hashtable_test_hash_for_each_safe),
|
||||
KUNIT_CASE(hashtable_test_hash_for_each_possible),
|
||||
KUNIT_CASE(hashtable_test_hash_for_each_possible_safe),
|
||||
{},
|
||||
};
|
||||
|
||||
static struct kunit_suite hashtable_test_module = {
|
||||
.name = "hashtable",
|
||||
.test_cases = hashtable_test_cases,
|
||||
};
|
||||
|
||||
kunit_test_suites(&hashtable_test_module);
|
||||
|
||||
MODULE_LICENSE("GPL");
|
||||
Loading…
Reference in New Issue
Block a user