test/image/spl_load_fs.c - u-boot - Git at Google


            
            // SPDX-License-Identifier: GPL-2.0+

            
            /*

            
             * Copyright (C) 2023 Sean Anderson <seanga2@gmail.com>

            
             */


            #include <blk.h>

            
            #include <ext_common.h>

            
            #include <ext4fs.h>

            
            #include <fat.h>

            
            #include <fs.h>

            
            #include <memalign.h>

            
            #include <spl.h>

            
            #include <asm/io.h>

            
            #include <linux/stat.h>

            
            #include <test/spl.h>

            
            #include <test/ut.h>


            /**

            
             * create_ext2() - Create an "ext2" filesystem with a single file

            
             * @dst: The location of the new filesystem; MUST be zeroed

            
             * @size: The size of the file

            
             * @filename: The name of the file

            
             * @data_offset: Filled with the offset of the file data from @dst

            
             *

            
             * Budget mke2fs. We use 1k blocks (to reduce overhead) with a single block

            
             * group, which limits us to 8M of data. Almost every feature which increases

            
             * complexity (checksums, hash tree directories, etc.) is disabled. We do cheat

            
             * a little and use extents from ext4 to save having to deal with indirects, but

            
             * U-Boot doesn't care.

            
             *

            
             * If @dst is %NULL, nothing is copied.

            
             *

            
             * Return: The size of the filesystem in bytes

            
             */

            
            static size_t create_ext2(void *dst, size_t size, const char *filename,

            
            			  size_t *data_offset)

            
            {

            
            	u32 super_block = 1;

            
            	u32 group_block = 2;

            
            	u32 block_bitmap_block = 3;

            
            	u32 inode_bitmap_block = 4;

            
            	u32 inode_table_block = 5;

            
            	u32 root_block = 6;

            
            	u32 file_block = 7;


            	u32 root_ino = EXT2_ROOT_INO;

            
            	u32 file_ino = EXT2_BOOT_LOADER_INO;


            	u32 block_size = EXT2_MIN_BLOCK_SIZE;

            
            	u32 inode_size = sizeof(struct ext2_inode);


            	u32 file_blocks = (size + block_size - 1) / block_size;

            
            	u32 blocks = file_block + file_blocks;

            
            	u32 inodes = block_size / inode_size;

            
            	u32 filename_len = strlen(filename);

            
            	u32 dirent_len = ALIGN(filename_len, sizeof(struct ext2_dirent)) +

            
            			    sizeof(struct ext2_dirent);


            	struct ext2_sblock *sblock = dst + super_block * block_size;

            
            	struct ext2_block_group *bg = dst + group_block * block_size;

            
            	struct ext2_inode *inode_table = dst + inode_table_block * block_size;

            
            	struct ext2_inode *root_inode = &inode_table[root_ino - 1];

            
            	struct ext2_inode *file_inode = &inode_table[file_ino - 1];

            
            	struct ext4_extent_header *ext_block = (void *)&file_inode->b;

            
            	struct ext4_extent *extent = (void *)(ext_block + 1);

            
            	struct ext2_dirent *dot = dst + root_block * block_size;

            
            	struct ext2_dirent *dotdot = dot + 2;

            
            	struct ext2_dirent *dirent = dotdot + 2;

            
            	struct ext2_dirent *last = ((void *)dirent) + dirent_len;


            	/* Make sure we fit in one block group */

            
            	if (blocks > block_size * 8)

            
            		return 0;


            	if (filename_len > EXT2_NAME_LEN)

            
            		return 0;


            	if (data_offset)

            
            		*data_offset = file_block * block_size;


            	if (!dst)

            
            		goto out;


            	sblock->total_inodes = cpu_to_le32(inodes);

            
            	sblock->total_blocks = cpu_to_le32(blocks);

            
            	sblock->first_data_block = cpu_to_le32(super_block);

            
            	sblock->blocks_per_group = cpu_to_le32(blocks);

            
            	sblock->fragments_per_group = cpu_to_le32(blocks);

            
            	sblock->inodes_per_group = cpu_to_le32(inodes);

            
            	sblock->magic = cpu_to_le16(EXT2_MAGIC);

            
            	/* Done mostly so we can pretend to be (in)compatible */

            
            	sblock->revision_level = cpu_to_le32(EXT2_DYNAMIC_REV);

            
            	/* Not really accurate but it doesn't matter */

            
            	sblock->first_inode = cpu_to_le32(EXT2_GOOD_OLD_FIRST_INO);

            
            	sblock->inode_size = cpu_to_le32(inode_size);

            
            	sblock->feature_incompat = cpu_to_le32(EXT4_FEATURE_INCOMPAT_EXTENTS);


            	bg->block_id = cpu_to_le32(block_bitmap_block);

            
            	bg->inode_id = cpu_to_le32(inode_bitmap_block);

            
            	bg->inode_table_id = cpu_to_le32(inode_table_block);


            	/*

            
            	 * All blocks/inodes are in-use. I don't want to have to deal with

            
            	 * endianness, so just fill everything in.

            
            	 */

            
            	memset(dst + block_bitmap_block * block_size, 0xff, block_size * 2);


            	root_inode->mode = cpu_to_le16(S_IFDIR | 0755);

            
            	root_inode->size = cpu_to_le32(block_size);

            
            	root_inode->nlinks = cpu_to_le16(3);

            
            	root_inode->blockcnt = cpu_to_le32(1);

            
            	root_inode->flags = cpu_to_le32(EXT4_TOPDIR_FL);

            
            	root_inode->b.blocks.dir_blocks[0] = root_block;


            	file_inode->mode = cpu_to_le16(S_IFREG | 0644);

            
            	file_inode->size = cpu_to_le32(size);

            
            	file_inode->nlinks = cpu_to_le16(1);

            
            	file_inode->blockcnt = cpu_to_le32(file_blocks);

            
            	file_inode->flags = cpu_to_le32(EXT4_EXTENTS_FL);

            
            	ext_block->eh_magic = cpu_to_le16(EXT4_EXT_MAGIC);

            
            	ext_block->eh_entries = cpu_to_le16(1);

            
            	ext_block->eh_max = cpu_to_le16(sizeof(file_inode->b) /

            
            					sizeof(*ext_block) - 1);

            
            	extent->ee_len = cpu_to_le16(file_blocks);

            
            	extent->ee_start_lo = cpu_to_le16(file_block);


            	/* I'm not sure we need these, but it can't hurt */

            
            	dot->inode = cpu_to_le32(root_ino);

            
            	dot->direntlen = cpu_to_le16(2 * sizeof(*dot));

            
            	dot->namelen = 1;

            
            	dot->filetype = FILETYPE_DIRECTORY;

            
            	memcpy(dot + 1, ".", dot->namelen);


            	dotdot->inode = cpu_to_le32(root_ino);

            
            	dotdot->direntlen = cpu_to_le16(2 * sizeof(*dotdot));

            
            	dotdot->namelen = 2;

            
            	dotdot->filetype = FILETYPE_DIRECTORY;

            
            	memcpy(dotdot + 1, "..", dotdot->namelen);


            	dirent->inode = cpu_to_le32(file_ino);

            
            	dirent->direntlen = cpu_to_le16(dirent_len);

            
            	dirent->namelen = filename_len;

            
            	dirent->filetype = FILETYPE_REG;

            
            	memcpy(dirent + 1, filename, filename_len);


            	last->direntlen = block_size - dirent_len;


            out:

            
            	return (size_t)blocks * block_size;

            
            }


            /**

            
             * create_fat() - Create a FAT32 filesystem with a single file

            
             * @dst: The location of the new filesystem; MUST be zeroed

            
             * @size: The size of the file

            
             * @filename: The name of the file

            
             * @data_offset: Filled with the offset of the file data from @dst

            
             *

            
             * Budget mkfs.fat. We use FAT32 (so I don't have to deal with FAT12) with no

            
             * info sector, and a single one-sector FAT. This limits us to 64k of data

            
             * (enough for anyone). The filename must fit in 8.3.

            
             *

            
             * If @dst is %NULL, nothing is copied.

            
             *

            
             * Return: The size of the filesystem in bytes

            
             */

            
            static size_t create_fat(void *dst, size_t size, const char *filename,

            
            			 size_t *data_offset)

            
            {

            
            	u16 boot_sector = 0;

            
            	u16 fat_sector = 1;

            
            	u32 root_sector = 2;

            
            	u32 file_sector = 3;


            	u16 sector_size = 512;

            
            	u32 file_sectors = (size + sector_size - 1) / sector_size;

            
            	u32 sectors = file_sector + file_sectors;


            	char *ext;

            
            	size_t filename_len, ext_len;

            
            	int i;


            	struct boot_sector *bs = dst + boot_sector * sector_size;

            
            	struct volume_info *vi = (void *)(bs + 1);

            
            	__le32 *fat = dst + fat_sector * sector_size;

            
            	struct dir_entry *dirent = dst + root_sector * sector_size;


            	/* Make sure we fit in the FAT */

            
            	if (sectors > sector_size / sizeof(u32))

            
            		return 0;


            	ext = strchr(filename, '.');

            
            	if (ext) {

            
            		filename_len = ext - filename;

            
            		ext++;

            
            		ext_len = strlen(ext);

            
            	} else {

            
            		filename_len = strlen(filename);

            
            		ext_len = 0;

            
            	}


            	if (filename_len > 8 || ext_len > 3)

            
            		return 0;


            	if (data_offset)

            
            		*data_offset = file_sector * sector_size;


            	if (!dst)

            
            		goto out;


            	bs->sector_size[0] = sector_size & 0xff;

            
            	bs->sector_size[1] = sector_size >> 8;

            
            	bs->cluster_size = 1;

            
            	bs->reserved = cpu_to_le16(fat_sector);

            
            	bs->fats = 1;

            
            	bs->media = 0xf8;

            
            	bs->total_sect = cpu_to_le32(sectors);

            
            	bs->fat32_length = cpu_to_le32(1);

            
            	bs->root_cluster = cpu_to_le32(root_sector);


            	vi->ext_boot_sign = 0x29;

            
            	memcpy(vi->fs_type, "FAT32   ", sizeof(vi->fs_type));


            	memcpy(dst + 0x1fe, "\x55\xAA", 2);


            	fat[0] = cpu_to_le32(0x0ffffff8);

            
            	fat[1] = cpu_to_le32(0x0fffffff);

            
            	fat[2] = cpu_to_le32(0x0ffffff8);

            
            	for (i = file_sector; file_sectors > 1; file_sectors--, i++)

            
            		fat[i] = cpu_to_le32(i + 1);

            
            	fat[i] = cpu_to_le32(0x0ffffff8);


            	for (i = 0; i < sizeof(dirent->nameext.name); i++) {

            
            		if (i < filename_len)

            
            			dirent->nameext.name[i] = toupper(filename[i]);

            
            		else

            
            			dirent->nameext.name[i] = ' ';

            
            	}


            	for (i = 0; i < sizeof(dirent->nameext.ext); i++) {

            
            		if (i < ext_len)

            
            			dirent->nameext.ext[i] = toupper(ext[i]);

            
            		else

            
            			dirent->nameext.ext[i] = ' ';

            
            	}


            	dirent->start = cpu_to_le16(file_sector);

            
            	dirent->size = cpu_to_le32(size);


            out:

            
            	return sectors * sector_size;

            
            }


            typedef size_t (*create_fs_t)(void *, size_t, const char *, size_t *);


            static int spl_test_fs(struct unit_test_state *uts, const char *test_name,

            
            		       create_fs_t create)

            
            {

            
            	const char *filename = CONFIG_SPL_FS_LOAD_PAYLOAD_NAME;

            
            	struct blk_desc *dev_desc;

            
            	char *data_write, *data_read;

            
            	void *fs;

            
            	size_t fs_size, fs_data, fs_blocks, data_size = SPL_TEST_DATA_SIZE;

            
            	loff_t actread;


            	fs_size = create(NULL, data_size, filename, &fs_data);

            
            	ut_assert(fs_size);

            
            	fs = calloc(fs_size, 1);

            
            	ut_assertnonnull(fs);


            	data_write = fs + fs_data;

            
            	generate_data(data_write, data_size, test_name);

            
            	ut_asserteq(fs_size, create(fs, data_size, filename, NULL));


            	dev_desc = blk_get_devnum_by_uclass_id(UCLASS_MMC, 0);

            
            	ut_assertnonnull(dev_desc);

            
            	ut_asserteq(512, dev_desc->blksz);

            
            	fs_blocks = fs_size / dev_desc->blksz;

            
            	ut_asserteq(fs_blocks, blk_dwrite(dev_desc, 0, fs_blocks, fs));


            	/* We have to use malloc so we can call virt_to_phys */

            
            	data_read = malloc_cache_aligned(data_size);

            
            	ut_assertnonnull(data_read);

            
            	ut_assertok(fs_set_blk_dev_with_part(dev_desc, 0));

            
            	ut_assertok(fs_read("/" CONFIG_SPL_FS_LOAD_PAYLOAD_NAME,

            
            			    virt_to_phys(data_read), 0, data_size, &actread));

            
            	ut_asserteq(data_size, actread);

            
            	ut_asserteq_mem(data_write, data_read, data_size);


            	free(data_read);

            
            	free(fs);

            
            	return 0;

            
            }


            static int spl_test_ext(struct unit_test_state *uts)

            
            {

            
            	return spl_test_fs(uts, __func__, create_ext2);

            
            }

            
            SPL_TEST(spl_test_ext, DM_FLAGS);


            static int spl_test_fat(struct unit_test_state *uts)

            
            {

            
            	spl_fat_force_reregister();

            
            	return spl_test_fs(uts, __func__, create_fat);

            
            }

            
            SPL_TEST(spl_test_fat, DM_FLAGS);


            static bool spl_mmc_raw;


            u32 spl_mmc_boot_mode(struct mmc *mmc, const u32 boot_device)

            
            {

            
            	return spl_mmc_raw ? MMCSD_MODE_RAW : MMCSD_MODE_FS;

            
            }


            static int spl_test_mmc_fs(struct unit_test_state *uts, const char *test_name,

            
            			   enum spl_test_image type, create_fs_t create_fs,

            
            			   bool blk_mode)

            
            {

            
            	const char *filename = CONFIG_SPL_FS_LOAD_PAYLOAD_NAME;

            
            	struct blk_desc *dev_desc;

            
            	size_t fs_size, fs_data, img_size, img_data,

            
            	       plain_size = SPL_TEST_DATA_SIZE;

            
            	struct spl_image_info info_write = {

            
            		.name = test_name,

            
            		.size = type == LEGACY_LZMA ? lzma_compressed_size :

            
            					      plain_size,

            
            	}, info_read = { };

            
            	struct disk_partition part = {

            
            		.start = 1,

            
            		.sys_ind = 0x83,

            
            	};

            
            	struct spl_image_loader *loader =

            
            		SPL_LOAD_IMAGE_GET(0, BOOT_DEVICE_MMC1, spl_mmc_load_image);

            
            	struct spl_boot_device bootdev = {

            
            		.boot_device = loader->boot_device,

            
            	};

            
            	void *fs;

            
            	char *data, *plain;


            	img_size = create_image(NULL, type, &info_write, &img_data);

            
            	ut_assert(img_size);

            
            	fs_size = create_fs(NULL, img_size, filename, &fs_data);

            
            	ut_assert(fs_size);

            
            	fs = calloc(fs_size, 1);

            
            	ut_assertnonnull(fs);


            	data = fs + fs_data + img_data;

            
            	if (type == LEGACY_LZMA) {

            
            		plain = malloc(plain_size);

            
            		ut_assertnonnull(plain);

            
            		generate_data(plain, plain_size, "lzma");

            
            		memcpy(data, lzma_compressed, lzma_compressed_size);

            
            	} else {

            
            		plain = data;

            
            		generate_data(plain, plain_size, test_name);

            
            	}

            
            	ut_asserteq(img_size, create_image(fs + fs_data, type, &info_write,

            
            					   NULL));

            
            	ut_asserteq(fs_size, create_fs(fs, img_size, filename, NULL));


            	dev_desc = blk_get_devnum_by_uclass_id(UCLASS_MMC, 0);

            
            	ut_assertnonnull(dev_desc);


            	ut_asserteq(512, dev_desc->blksz);

            
            	part.size = fs_size / dev_desc->blksz;

            
            	ut_assertok(write_mbr_partitions(dev_desc, &part, 1, 0));

            
            	ut_asserteq(part.size, blk_dwrite(dev_desc, part.start, part.size, fs));


            	spl_mmc_raw = false;

            
            	if (blk_mode)

            
            		ut_assertok(spl_blk_load_image(&info_read, &bootdev, UCLASS_MMC,

            
            					       0, 1));

            
            	else

            
            		ut_assertok(loader->load_image(&info_read, &bootdev));

            
            	if (check_image_info(uts, &info_write, &info_read))

            
            		return CMD_RET_FAILURE;

            
            	if (type == LEGACY_LZMA)

            
            		ut_asserteq(plain_size, info_read.size);

            
            	ut_asserteq_mem(plain, phys_to_virt(info_write.load_addr), plain_size);


            	if (type == LEGACY_LZMA)

            
            		free(plain);

            
            	free(fs);

            
            	return 0;

            
            }


            static int spl_test_blk(struct unit_test_state *uts, const char *test_name,

            
            			enum spl_test_image type)

            
            {

            
            	spl_fat_force_reregister();

            
            	if (spl_test_mmc_fs(uts, test_name, type, create_fat, true))

            
            		return CMD_RET_FAILURE;


            	return spl_test_mmc_fs(uts, test_name, type, create_ext2, true);

            
            }

            
            SPL_IMG_TEST(spl_test_blk, LEGACY, DM_FLAGS);

            
            SPL_IMG_TEST(spl_test_blk, LEGACY_LZMA, DM_FLAGS);

            
            SPL_IMG_TEST(spl_test_blk, IMX8, DM_FLAGS);

            
            SPL_IMG_TEST(spl_test_blk, FIT_EXTERNAL, DM_FLAGS);

            
            SPL_IMG_TEST(spl_test_blk, FIT_INTERNAL, DM_FLAGS);


            static int spl_test_mmc_write_image(struct unit_test_state *uts, void *img,

            
            				    size_t img_size)

            
            {

            
            	struct blk_desc *dev_desc;

            
            	size_t img_blocks;


            	dev_desc = blk_get_devnum_by_uclass_id(UCLASS_MMC, 0);

            
            	ut_assertnonnull(dev_desc);


            	img_blocks = DIV_ROUND_UP(img_size, dev_desc->blksz);

            
            	ut_asserteq(img_blocks, blk_dwrite(dev_desc,

            
            					   CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR,

            
            					   img_blocks, img));


            	spl_mmc_raw = true;

            
            	return 0;

            
            }


            static int spl_test_mmc(struct unit_test_state *uts, const char *test_name,

            
            			enum spl_test_image type)

            
            {

            
            	spl_mmc_clear_cache();

            
            	spl_fat_force_reregister();


            	if (spl_test_mmc_fs(uts, test_name, type, create_ext2, false))

            
            		return CMD_RET_FAILURE;


            	if (spl_test_mmc_fs(uts, test_name, type, create_fat, false))

            
            		return CMD_RET_FAILURE;


            	return do_spl_test_load(uts, test_name, type,

            
            				SPL_LOAD_IMAGE_GET(0, BOOT_DEVICE_MMC1,

            
            						   spl_mmc_load_image),

            
            				spl_test_mmc_write_image);

            
            }

            
            SPL_IMG_TEST(spl_test_mmc, LEGACY, DM_FLAGS);

            
            SPL_IMG_TEST(spl_test_mmc, LEGACY_LZMA, DM_FLAGS);

            
            SPL_IMG_TEST(spl_test_mmc, IMX8, DM_FLAGS);

            
            SPL_IMG_TEST(spl_test_mmc, FIT_EXTERNAL, DM_FLAGS);

            
            SPL_IMG_TEST(spl_test_mmc, FIT_INTERNAL, DM_FLAGS);
	// SPDX-License-Identifier: GPL-2.0+
	/*
	* Copyright (C) 2023 Sean Anderson <seanga2@gmail.com>
	*/

	#include <blk.h>
	#include <ext_common.h>
	#include <ext4fs.h>
	#include <fat.h>
	#include <fs.h>
	#include <memalign.h>
	#include <spl.h>
	#include <asm/io.h>
	#include <linux/stat.h>
	#include <test/spl.h>
	#include <test/ut.h>

	/**
	* create_ext2() - Create an "ext2" filesystem with a single file
	* @dst: The location of the new filesystem; MUST be zeroed
	* @size: The size of the file
	* @filename: The name of the file
	* @data_offset: Filled with the offset of the file data from @dst
	*
	* Budget mke2fs. We use 1k blocks (to reduce overhead) with a single block
	* group, which limits us to 8M of data. Almost every feature which increases
	* complexity (checksums, hash tree directories, etc.) is disabled. We do cheat
	* a little and use extents from ext4 to save having to deal with indirects, but
	* U-Boot doesn't care.
	*
	* If @dst is %NULL, nothing is copied.
	*
	* Return: The size of the filesystem in bytes
	*/
	static size_t create_ext2(void dst, size_t size, const char filename,
	size_t *data_offset)
	{
	u32 super_block = 1;
	u32 group_block = 2;
	u32 block_bitmap_block = 3;
	u32 inode_bitmap_block = 4;
	u32 inode_table_block = 5;
	u32 root_block = 6;
	u32 file_block = 7;

	u32 root_ino = EXT2_ROOT_INO;
	u32 file_ino = EXT2_BOOT_LOADER_INO;

	u32 block_size = EXT2_MIN_BLOCK_SIZE;
	u32 inode_size = sizeof(struct ext2_inode);

	u32 file_blocks = (size + block_size - 1) / block_size;
	u32 blocks = file_block + file_blocks;
	u32 inodes = block_size / inode_size;
	u32 filename_len = strlen(filename);
	u32 dirent_len = ALIGN(filename_len, sizeof(struct ext2_dirent)) +
	sizeof(struct ext2_dirent);

	struct ext2_sblock sblock = dst + super_block block_size;
	struct ext2_block_group bg = dst + group_block block_size;
	struct ext2_inode inode_table = dst + inode_table_block block_size;
	struct ext2_inode *root_inode = &inode_table[root_ino - 1];
	struct ext2_inode *file_inode = &inode_table[file_ino - 1];
	struct ext4_extent_header ext_block = (void )&file_inode->b;
	struct ext4_extent extent = (void )(ext_block + 1);
	struct ext2_dirent dot = dst + root_block block_size;
	struct ext2_dirent *dotdot = dot + 2;
	struct ext2_dirent *dirent = dotdot + 2;
	struct ext2_dirent last = ((void )dirent) + dirent_len;

	/* Make sure we fit in one block group */
	if (blocks > block_size * 8)
	return 0;

	if (filename_len > EXT2_NAME_LEN)
	return 0;

	if (data_offset)
	data_offset = file_block block_size;

	if (!dst)
	goto out;

	sblock->total_inodes = cpu_to_le32(inodes);
	sblock->total_blocks = cpu_to_le32(blocks);
	sblock->first_data_block = cpu_to_le32(super_block);
	sblock->blocks_per_group = cpu_to_le32(blocks);
	sblock->fragments_per_group = cpu_to_le32(blocks);
	sblock->inodes_per_group = cpu_to_le32(inodes);
	sblock->magic = cpu_to_le16(EXT2_MAGIC);
	/* Done mostly so we can pretend to be (in)compatible */
	sblock->revision_level = cpu_to_le32(EXT2_DYNAMIC_REV);
	/* Not really accurate but it doesn't matter */
	sblock->first_inode = cpu_to_le32(EXT2_GOOD_OLD_FIRST_INO);
	sblock->inode_size = cpu_to_le32(inode_size);
	sblock->feature_incompat = cpu_to_le32(EXT4_FEATURE_INCOMPAT_EXTENTS);

	bg->block_id = cpu_to_le32(block_bitmap_block);
	bg->inode_id = cpu_to_le32(inode_bitmap_block);
	bg->inode_table_id = cpu_to_le32(inode_table_block);

	/*
	* All blocks/inodes are in-use. I don't want to have to deal with
	* endianness, so just fill everything in.
	*/
	memset(dst + block_bitmap_block * block_size, 0xff, block_size * 2);

	root_inode->mode = cpu_to_le16(S_IFDIR \| 0755);
	root_inode->size = cpu_to_le32(block_size);
	root_inode->nlinks = cpu_to_le16(3);
	root_inode->blockcnt = cpu_to_le32(1);
	root_inode->flags = cpu_to_le32(EXT4_TOPDIR_FL);
	root_inode->b.blocks.dir_blocks[0] = root_block;

	file_inode->mode = cpu_to_le16(S_IFREG \| 0644);
	file_inode->size = cpu_to_le32(size);
	file_inode->nlinks = cpu_to_le16(1);
	file_inode->blockcnt = cpu_to_le32(file_blocks);
	file_inode->flags = cpu_to_le32(EXT4_EXTENTS_FL);
	ext_block->eh_magic = cpu_to_le16(EXT4_EXT_MAGIC);
	ext_block->eh_entries = cpu_to_le16(1);
	ext_block->eh_max = cpu_to_le16(sizeof(file_inode->b) /
	sizeof(*ext_block) - 1);
	extent->ee_len = cpu_to_le16(file_blocks);
	extent->ee_start_lo = cpu_to_le16(file_block);

	/* I'm not sure we need these, but it can't hurt */
	dot->inode = cpu_to_le32(root_ino);
	dot->direntlen = cpu_to_le16(2 * sizeof(*dot));
	dot->namelen = 1;
	dot->filetype = FILETYPE_DIRECTORY;
	memcpy(dot + 1, ".", dot->namelen);

	dotdot->inode = cpu_to_le32(root_ino);
	dotdot->direntlen = cpu_to_le16(2 * sizeof(*dotdot));
	dotdot->namelen = 2;
	dotdot->filetype = FILETYPE_DIRECTORY;
	memcpy(dotdot + 1, "..", dotdot->namelen);

	dirent->inode = cpu_to_le32(file_ino);
	dirent->direntlen = cpu_to_le16(dirent_len);
	dirent->namelen = filename_len;
	dirent->filetype = FILETYPE_REG;
	memcpy(dirent + 1, filename, filename_len);

	last->direntlen = block_size - dirent_len;

	out:
	return (size_t)blocks * block_size;
	}

	/**
	* create_fat() - Create a FAT32 filesystem with a single file
	* @dst: The location of the new filesystem; MUST be zeroed
	* @size: The size of the file
	* @filename: The name of the file
	* @data_offset: Filled with the offset of the file data from @dst
	*
	* Budget mkfs.fat. We use FAT32 (so I don't have to deal with FAT12) with no
	* info sector, and a single one-sector FAT. This limits us to 64k of data
	* (enough for anyone). The filename must fit in 8.3.
	*
	* If @dst is %NULL, nothing is copied.
	*
	* Return: The size of the filesystem in bytes
	*/
	static size_t create_fat(void dst, size_t size, const char filename,
	size_t *data_offset)
	{
	u16 boot_sector = 0;
	u16 fat_sector = 1;
	u32 root_sector = 2;
	u32 file_sector = 3;

	u16 sector_size = 512;
	u32 file_sectors = (size + sector_size - 1) / sector_size;
	u32 sectors = file_sector + file_sectors;

	char *ext;
	size_t filename_len, ext_len;
	int i;

	struct boot_sector bs = dst + boot_sector sector_size;
	struct volume_info vi = (void )(bs + 1);
	__le32 fat = dst + fat_sector sector_size;
	struct dir_entry dirent = dst + root_sector sector_size;

	/* Make sure we fit in the FAT */
	if (sectors > sector_size / sizeof(u32))
	return 0;

	ext = strchr(filename, '.');
	if (ext) {
	filename_len = ext - filename;
	ext++;
	ext_len = strlen(ext);
	} else {
	filename_len = strlen(filename);
	ext_len = 0;
	}

	if (filename_len > 8 \|\| ext_len > 3)
	return 0;

	if (data_offset)
	data_offset = file_sector sector_size;

	if (!dst)
	goto out;

	bs->sector_size[0] = sector_size & 0xff;
	bs->sector_size[1] = sector_size >> 8;
	bs->cluster_size = 1;
	bs->reserved = cpu_to_le16(fat_sector);
	bs->fats = 1;
	bs->media = 0xf8;
	bs->total_sect = cpu_to_le32(sectors);
	bs->fat32_length = cpu_to_le32(1);
	bs->root_cluster = cpu_to_le32(root_sector);

	vi->ext_boot_sign = 0x29;
	memcpy(vi->fs_type, "FAT32 ", sizeof(vi->fs_type));

	memcpy(dst + 0x1fe, "\x55\xAA", 2);

	fat[0] = cpu_to_le32(0x0ffffff8);
	fat[1] = cpu_to_le32(0x0fffffff);
	fat[2] = cpu_to_le32(0x0ffffff8);
	for (i = file_sector; file_sectors > 1; file_sectors--, i++)
	fat[i] = cpu_to_le32(i + 1);
	fat[i] = cpu_to_le32(0x0ffffff8);

	for (i = 0; i < sizeof(dirent->nameext.name); i++) {
	if (i < filename_len)
	dirent->nameext.name[i] = toupper(filename[i]);
	else
	dirent->nameext.name[i] = ' ';
	}

	for (i = 0; i < sizeof(dirent->nameext.ext); i++) {
	if (i < ext_len)
	dirent->nameext.ext[i] = toupper(ext[i]);
	else
	dirent->nameext.ext[i] = ' ';
	}

	dirent->start = cpu_to_le16(file_sector);
	dirent->size = cpu_to_le32(size);

	out:
	return sectors * sector_size;
	}

	typedef size_t (create_fs_t)(void , size_t, const char , size_t );

	static int spl_test_fs(struct unit_test_state uts, const char test_name,
	create_fs_t create)
	{
	const char *filename = CONFIG_SPL_FS_LOAD_PAYLOAD_NAME;
	struct blk_desc *dev_desc;
	char data_write, data_read;
	void *fs;
	size_t fs_size, fs_data, fs_blocks, data_size = SPL_TEST_DATA_SIZE;
	loff_t actread;

	fs_size = create(NULL, data_size, filename, &fs_data);
	ut_assert(fs_size);
	fs = calloc(fs_size, 1);
	ut_assertnonnull(fs);

	data_write = fs + fs_data;
	generate_data(data_write, data_size, test_name);
	ut_asserteq(fs_size, create(fs, data_size, filename, NULL));

	dev_desc = blk_get_devnum_by_uclass_id(UCLASS_MMC, 0);
	ut_assertnonnull(dev_desc);
	ut_asserteq(512, dev_desc->blksz);
	fs_blocks = fs_size / dev_desc->blksz;
	ut_asserteq(fs_blocks, blk_dwrite(dev_desc, 0, fs_blocks, fs));

	/* We have to use malloc so we can call virt_to_phys */
	data_read = malloc_cache_aligned(data_size);
	ut_assertnonnull(data_read);
	ut_assertok(fs_set_blk_dev_with_part(dev_desc, 0));
	ut_assertok(fs_read("/" CONFIG_SPL_FS_LOAD_PAYLOAD_NAME,
	virt_to_phys(data_read), 0, data_size, &actread));
	ut_asserteq(data_size, actread);
	ut_asserteq_mem(data_write, data_read, data_size);

	free(data_read);
	free(fs);
	return 0;
	}

	static int spl_test_ext(struct unit_test_state *uts)
	{
	return spl_test_fs(uts, __func__, create_ext2);
	}
	SPL_TEST(spl_test_ext, DM_FLAGS);

	static int spl_test_fat(struct unit_test_state *uts)
	{
	spl_fat_force_reregister();
	return spl_test_fs(uts, __func__, create_fat);
	}
	SPL_TEST(spl_test_fat, DM_FLAGS);

	static bool spl_mmc_raw;

	u32 spl_mmc_boot_mode(struct mmc *mmc, const u32 boot_device)
	{
	return spl_mmc_raw ? MMCSD_MODE_RAW : MMCSD_MODE_FS;
	}

	static int spl_test_mmc_fs(struct unit_test_state uts, const char test_name,
	enum spl_test_image type, create_fs_t create_fs,
	bool blk_mode)
	{
	const char *filename = CONFIG_SPL_FS_LOAD_PAYLOAD_NAME;
	struct blk_desc *dev_desc;
	size_t fs_size, fs_data, img_size, img_data,
	plain_size = SPL_TEST_DATA_SIZE;
	struct spl_image_info info_write = {
	.name = test_name,
	.size = type == LEGACY_LZMA ? lzma_compressed_size :
	plain_size,
	}, info_read = { };
	struct disk_partition part = {
	.start = 1,
	.sys_ind = 0x83,
	};
	struct spl_image_loader *loader =
	SPL_LOAD_IMAGE_GET(0, BOOT_DEVICE_MMC1, spl_mmc_load_image);
	struct spl_boot_device bootdev = {
	.boot_device = loader->boot_device,
	};
	void *fs;
	char data, plain;

	img_size = create_image(NULL, type, &info_write, &img_data);
	ut_assert(img_size);
	fs_size = create_fs(NULL, img_size, filename, &fs_data);
	ut_assert(fs_size);
	fs = calloc(fs_size, 1);
	ut_assertnonnull(fs);

	data = fs + fs_data + img_data;
	if (type == LEGACY_LZMA) {
	plain = malloc(plain_size);
	ut_assertnonnull(plain);
	generate_data(plain, plain_size, "lzma");
	memcpy(data, lzma_compressed, lzma_compressed_size);
	} else {
	plain = data;
	generate_data(plain, plain_size, test_name);
	}
	ut_asserteq(img_size, create_image(fs + fs_data, type, &info_write,
	NULL));
	ut_asserteq(fs_size, create_fs(fs, img_size, filename, NULL));

	dev_desc = blk_get_devnum_by_uclass_id(UCLASS_MMC, 0);
	ut_assertnonnull(dev_desc);

	ut_asserteq(512, dev_desc->blksz);
	part.size = fs_size / dev_desc->blksz;
	ut_assertok(write_mbr_partitions(dev_desc, &part, 1, 0));
	ut_asserteq(part.size, blk_dwrite(dev_desc, part.start, part.size, fs));

	spl_mmc_raw = false;
	if (blk_mode)
	ut_assertok(spl_blk_load_image(&info_read, &bootdev, UCLASS_MMC,
	0, 1));
	else
	ut_assertok(loader->load_image(&info_read, &bootdev));
	if (check_image_info(uts, &info_write, &info_read))
	return CMD_RET_FAILURE;
	if (type == LEGACY_LZMA)
	ut_asserteq(plain_size, info_read.size);
	ut_asserteq_mem(plain, phys_to_virt(info_write.load_addr), plain_size);

	if (type == LEGACY_LZMA)
	free(plain);
	free(fs);
	return 0;
	}

	static int spl_test_blk(struct unit_test_state uts, const char test_name,
	enum spl_test_image type)
	{
	spl_fat_force_reregister();
	if (spl_test_mmc_fs(uts, test_name, type, create_fat, true))
	return CMD_RET_FAILURE;

	return spl_test_mmc_fs(uts, test_name, type, create_ext2, true);
	}
	SPL_IMG_TEST(spl_test_blk, LEGACY, DM_FLAGS);
	SPL_IMG_TEST(spl_test_blk, LEGACY_LZMA, DM_FLAGS);
	SPL_IMG_TEST(spl_test_blk, IMX8, DM_FLAGS);
	SPL_IMG_TEST(spl_test_blk, FIT_EXTERNAL, DM_FLAGS);
	SPL_IMG_TEST(spl_test_blk, FIT_INTERNAL, DM_FLAGS);

	static int spl_test_mmc_write_image(struct unit_test_state uts, void img,
	size_t img_size)
	{
	struct blk_desc *dev_desc;
	size_t img_blocks;

	dev_desc = blk_get_devnum_by_uclass_id(UCLASS_MMC, 0);
	ut_assertnonnull(dev_desc);

	img_blocks = DIV_ROUND_UP(img_size, dev_desc->blksz);
	ut_asserteq(img_blocks, blk_dwrite(dev_desc,
	CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR,
	img_blocks, img));

	spl_mmc_raw = true;
	return 0;
	}

	static int spl_test_mmc(struct unit_test_state uts, const char test_name,
	enum spl_test_image type)
	{
	spl_mmc_clear_cache();
	spl_fat_force_reregister();

	if (spl_test_mmc_fs(uts, test_name, type, create_ext2, false))
	return CMD_RET_FAILURE;

	if (spl_test_mmc_fs(uts, test_name, type, create_fat, false))
	return CMD_RET_FAILURE;

	return do_spl_test_load(uts, test_name, type,
	SPL_LOAD_IMAGE_GET(0, BOOT_DEVICE_MMC1,
	spl_mmc_load_image),
	spl_test_mmc_write_image);
	}
	SPL_IMG_TEST(spl_test_mmc, LEGACY, DM_FLAGS);
	SPL_IMG_TEST(spl_test_mmc, LEGACY_LZMA, DM_FLAGS);
	SPL_IMG_TEST(spl_test_mmc, IMX8, DM_FLAGS);
	SPL_IMG_TEST(spl_test_mmc, FIT_EXTERNAL, DM_FLAGS);
	SPL_IMG_TEST(spl_test_mmc, FIT_INTERNAL, DM_FLAGS);