diff options
| -rw-r--r-- | fs/ext4/mballoc-test.c | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/fs/ext4/mballoc-test.c b/fs/ext4/mballoc-test.c index 6964974fa536..38e3644cb810 100644 --- a/fs/ext4/mballoc-test.c +++ b/fs/ext4/mballoc-test.c @@ -148,9 +148,13 @@ static void mbt_init_sb_layout(struct super_block *sb, static int mbt_grp_ctx_init(struct super_block *sb, struct mbt_grp_ctx *grp_ctx) { + ext4_grpblk_t max = EXT4_CLUSTERS_PER_GROUP(sb); + grp_ctx->bitmap_bh.b_data = kzalloc(EXT4_BLOCK_SIZE(sb), GFP_KERNEL); if (grp_ctx->bitmap_bh.b_data == NULL) return -ENOMEM; + mb_set_bits(grp_ctx->bitmap_bh.b_data, max, sb->s_blocksize * 8 - max); + ext4_free_group_clusters_set(sb, &grp_ctx->desc, max); return 0; } @@ -197,6 +201,8 @@ static int mbt_ctx_init(struct super_block *sb) * block which will fail ext4_sb_block_valid check. */ mb_set_bits(ctx->grp_ctx[0].bitmap_bh.b_data, 0, 1); + ext4_free_group_clusters_set(sb, &ctx->grp_ctx[0].desc, + EXT4_CLUSTERS_PER_GROUP(sb) - 1); return 0; out: @@ -231,6 +237,13 @@ static int ext4_wait_block_bitmap_stub(struct super_block *sb, ext4_group_t block_group, struct buffer_head *bh) { + /* + * real ext4_wait_block_bitmap will set these flags and + * functions like ext4_mb_init_cache will verify the flags. + */ + set_buffer_uptodate(bh); + set_bitmap_uptodate(bh); + set_buffer_verified(bh); return 0; } @@ -598,6 +611,70 @@ static void test_mb_generate_buddy(struct kunit *test) } } +static void +test_mb_mark_used_range(struct kunit *test, struct ext4_buddy *e4b, + ext4_grpblk_t start, ext4_grpblk_t len, void *bitmap, + void *buddy, struct ext4_group_info *grp) +{ + struct super_block *sb = (struct super_block *)test->priv; + struct ext4_free_extent ex; + int i; + + /* mb_mark_used only accepts non-zero len */ + if (len == 0) + return; + + ex.fe_start = start; + ex.fe_len = len; + ex.fe_group = TEST_GOAL_GROUP; + mb_mark_used(e4b, &ex); + + mb_set_bits(bitmap, start, len); + /* bypass bb_free validatoin in ext4_mb_generate_buddy */ + grp->bb_free -= len; + memset(buddy, 0xff, sb->s_blocksize); + for (i = 0; i < MB_NUM_ORDERS(sb); i++) + grp->bb_counters[i] = 0; + ext4_mb_generate_buddy(sb, buddy, bitmap, 0, grp); + + KUNIT_ASSERT_EQ(test, memcmp(buddy, e4b->bd_buddy, sb->s_blocksize), + 0); + mbt_validate_group_info(test, grp, e4b->bd_info); +} + +static void test_mb_mark_used(struct kunit *test) +{ + struct ext4_buddy e4b; + struct super_block *sb = (struct super_block *)test->priv; + void *bitmap, *buddy; + struct ext4_group_info *grp; + int ret; + struct test_range ranges[TEST_RANGE_COUNT]; + int i; + + /* buddy cache assumes that each page contains at least one block */ + if (sb->s_blocksize > PAGE_SIZE) + kunit_skip(test, "blocksize exceeds pagesize"); + + bitmap = kunit_kzalloc(test, sb->s_blocksize, GFP_KERNEL); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, bitmap); + buddy = kunit_kzalloc(test, sb->s_blocksize, GFP_KERNEL); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, buddy); + grp = kunit_kzalloc(test, offsetof(struct ext4_group_info, + bb_counters[MB_NUM_ORDERS(sb)]), GFP_KERNEL); + + ret = ext4_mb_load_buddy(sb, TEST_GOAL_GROUP, &e4b); + KUNIT_ASSERT_EQ(test, ret, 0); + + grp->bb_free = EXT4_CLUSTERS_PER_GROUP(sb); + mbt_generate_test_ranges(sb, ranges, TEST_RANGE_COUNT); + for (i = 0; i < TEST_RANGE_COUNT; i++) + test_mb_mark_used_range(test, &e4b, ranges[i].start, + ranges[i].len, bitmap, buddy, grp); + + ext4_mb_unload_buddy(&e4b); +} + static const struct mbt_ext4_block_layout mbt_test_layouts[] = { { .blocksize_bits = 10, @@ -637,6 +714,7 @@ static struct kunit_case mbt_test_cases[] = { KUNIT_CASE_PARAM(test_new_blocks_simple, mbt_layouts_gen_params), KUNIT_CASE_PARAM(test_free_blocks_simple, mbt_layouts_gen_params), KUNIT_CASE_PARAM(test_mb_generate_buddy, mbt_layouts_gen_params), + KUNIT_CASE_PARAM(test_mb_mark_used, mbt_layouts_gen_params), {} }; |