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ext4: Add unit test for ext4_mb_mark_diskspace_used 

Add unit test for ext4_mb_mark_diskspace_used

Signed-off-by: Kemeng Shi <shikemeng@huaweicloud.com>
Link: https://lore.kernel.org/r/20240103104900.464789-6-shikemeng@huaweicloud.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
This commit is contained in:
Kemeng Shi 2024-01-03 18:49:00 +08:00 committed by Theodore Ts'o
parent b7098e1fa7
commit 2b81493f8e
1 changed files with 52 additions and 0 deletions
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52
fs/ext4/mballoc-test.c
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@ -470,6 +470,57 @@ static void test_free_blocks_simple(struct kunit *test)
ranges[i].start, ranges[i].len);
}
static void
test_mark_diskspace_used_range(struct kunit *test,
struct ext4_allocation_context *ac,
ext4_grpblk_t start,
ext4_grpblk_t len)
{
struct super_block *sb = (struct super_block *)test->priv;
int ret;
void *bitmap;
ext4_grpblk_t i, max;
/* ext4_mb_mark_diskspace_used will BUG if len is 0 */
if (len == 0)
return;
ac->ac_b_ex.fe_group = TEST_GOAL_GROUP;
ac->ac_b_ex.fe_start = start;
ac->ac_b_ex.fe_len = len;
bitmap = mbt_ctx_bitmap(sb, TEST_GOAL_GROUP);
memset(bitmap, 0, sb->s_blocksize);
ret = ext4_mb_mark_diskspace_used(ac, NULL, 0);
KUNIT_ASSERT_EQ(test, ret, 0);
max = EXT4_CLUSTERS_PER_GROUP(sb);
i = mb_find_next_bit(bitmap, max, 0);
KUNIT_ASSERT_EQ(test, i, start);
i = mb_find_next_zero_bit(bitmap, max, i + 1);
KUNIT_ASSERT_EQ(test, i, start + len);
i = mb_find_next_bit(bitmap, max, i + 1);
KUNIT_ASSERT_EQ(test, max, i);
}
static void test_mark_diskspace_used(struct kunit *test)
{
struct super_block *sb = (struct super_block *)test->priv;
struct inode inode = { .i_sb = sb, };
struct ext4_allocation_context ac;
struct test_range ranges[TEST_RANGE_COUNT];
int i;
mbt_generate_test_ranges(sb, ranges, TEST_RANGE_COUNT);
ac.ac_status = AC_STATUS_FOUND;
ac.ac_sb = sb;
ac.ac_inode = &inode;
for (i = 0; i < TEST_RANGE_COUNT; i++)
test_mark_diskspace_used_range(test, &ac, ranges[i].start,
ranges[i].len);
}
static void mbt_generate_buddy(struct super_block *sb, void *buddy,
void *bitmap, struct ext4_group_info *grp)
{
@ -784,6 +835,7 @@ static struct kunit_case mbt_test_cases[] = {
KUNIT_CASE_PARAM(test_mb_generate_buddy, mbt_layouts_gen_params),
KUNIT_CASE_PARAM(test_mb_mark_used, mbt_layouts_gen_params),
KUNIT_CASE_PARAM(test_mb_free_blocks, mbt_layouts_gen_params),
KUNIT_CASE_PARAM(test_mark_diskspace_used, mbt_layouts_gen_params),
{}
};