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Diffstat (limited to 'include/ext_common.h')
-rw-r--r-- | include/ext_common.h | 265 |
1 files changed, 265 insertions, 0 deletions
diff --git a/include/ext_common.h b/include/ext_common.h new file mode 100644 index 00000000000..6e17fbd2771 --- /dev/null +++ b/include/ext_common.h @@ -0,0 +1,265 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * (C) Copyright 2011 - 2012 Samsung Electronics + * EXT4 filesystem implementation in Uboot by + * Uma Shankar <uma.shankar@samsung.com> + * Manjunatha C Achar <a.manjunatha@samsung.com> + * + * Data structures and headers for ext4 support have been taken from + * ext2 ls load support in Uboot + * + * (C) Copyright 2004 + * esd gmbh <www.esd-electronics.com> + * Reinhard Arlt <reinhard.arlt@esd-electronics.com> + * + * based on code from grub2 fs/ext2.c and fs/fshelp.c by + * GRUB -- GRand Unified Bootloader + * Copyright (C) 2003, 2004 Free Software Foundation, Inc. + */ + +#ifndef __EXT_COMMON__ +#define __EXT_COMMON__ + +#include <compiler.h> + +struct cmd_tbl; + +#define SECTOR_SIZE 0x200 +#define LOG2_SECTOR_SIZE 9 + +/* Magic value used to identify an ext2 filesystem. */ +#define EXT2_MAGIC 0xEF53 +/* Amount of indirect blocks in an inode. */ +#define INDIRECT_BLOCKS 12 +/* Maximum lenght of a pathname. */ +#define EXT2_PATH_MAX 4096 +/* Maximum nesting of symlinks, used to prevent a loop. */ +#define EXT2_MAX_SYMLINKCNT 8 +/* Maximum file name length */ +#define EXT2_NAME_LEN 255 + +/* + * Revision levels + */ +#define EXT2_GOOD_OLD_REV 0 /* The good old (original) format */ +#define EXT2_DYNAMIC_REV 1 /* V2 format w/ dynamic inode sizes */ + +#define EXT2_GOOD_OLD_INODE_SIZE 128 + +/* Filetype used in directory entry. */ +#define FILETYPE_UNKNOWN 0 +#define FILETYPE_REG 1 +#define FILETYPE_DIRECTORY 2 +#define FILETYPE_SYMLINK 7 + +/* Filetype information as used in inodes. */ +#define FILETYPE_INO_MASK 0170000 +#define FILETYPE_INO_REG 0100000 +#define FILETYPE_INO_DIRECTORY 0040000 +#define FILETYPE_INO_SYMLINK 0120000 +#define EXT2_ROOT_INO 2 /* Root inode */ +#define EXT2_BOOT_LOADER_INO 5 /* Boot loader inode */ + +/* First non-reserved inode for old ext2 filesystems */ +#define EXT2_GOOD_OLD_FIRST_INO 11 + +/* The size of an ext2 block in bytes. */ +#define EXT2_BLOCK_SIZE(data) (1 << LOG2_BLOCK_SIZE(data)) + +/* Log2 size of ext2 block in bytes. */ +#define LOG2_BLOCK_SIZE(data) (le32_to_cpu \ + (data->sblock.log2_block_size) \ + + EXT2_MIN_BLOCK_LOG_SIZE) + +#define EXT2_FT_DIR 2 +#define SUCCESS 1 + +/* Macro-instructions used to manage several block sizes */ +#define EXT2_MIN_BLOCK_LOG_SIZE 10 /* 1024 */ +#define EXT2_MAX_BLOCK_LOG_SIZE 16 /* 65536 */ +#define EXT2_MIN_BLOCK_SIZE (1 << EXT2_MIN_BLOCK_LOG_SIZE) +#define EXT2_MAX_BLOCK_SIZE (1 << EXT2_MAX_BLOCK_LOG_SIZE) + +/* The ext2 superblock. */ +struct ext2_sblock { + __le32 total_inodes; + __le32 total_blocks; + __le32 reserved_blocks; + __le32 free_blocks; + __le32 free_inodes; + __le32 first_data_block; + __le32 log2_block_size; + __le32 log2_fragment_size; + __le32 blocks_per_group; + __le32 fragments_per_group; + __le32 inodes_per_group; + __le32 mtime; + __le32 utime; + __le16 mnt_count; + __le16 max_mnt_count; + __le16 magic; + __le16 fs_state; + __le16 error_handling; + __le16 minor_revision_level; + __le32 lastcheck; + __le32 checkinterval; + __le32 creator_os; + __le32 revision_level; + __le16 uid_reserved; + __le16 gid_reserved; + __le32 first_inode; + __le16 inode_size; + __le16 block_group_number; + __le32 feature_compatibility; + __le32 feature_incompat; + __le32 feature_ro_compat; + __le32 unique_id[4]; + char volume_name[16]; + char last_mounted_on[64]; + __le32 compression_info; + uint8_t prealloc_blocks; + uint8_t prealloc_dir_blocks; + __le16 reserved_gdt_blocks; + uint8_t journal_uuid[16]; + __le32 journal_inode; + __le32 journal_dev; + __le32 last_orphan; + __le32 hash_seed[4]; + uint8_t default_hash_version; + uint8_t journal_backup_type; + __le16 descriptor_size; + __le32 default_mount_options; + __le32 first_meta_block_group; + __le32 mkfs_time; + __le32 journal_blocks[17]; + __le32 total_blocks_high; + __le32 reserved_blocks_high; + __le32 free_blocks_high; + __le16 min_extra_inode_size; + __le16 want_extra_inode_size; + __le32 flags; + __le16 raid_stride; + __le16 mmp_interval; + __le64 mmp_block; + __le32 raid_stripe_width; + uint8_t log2_groups_per_flex; + uint8_t checksum_type; +}; + +struct ext2_block_group { + __le32 block_id; /* Blocks bitmap block */ + __le32 inode_id; /* Inodes bitmap block */ + __le32 inode_table_id; /* Inodes table block */ + __le16 free_blocks; /* Free blocks count */ + __le16 free_inodes; /* Free inodes count */ + __le16 used_dir_cnt; /* Directories count */ + __le16 bg_flags; + __le32 bg_exclude_bitmap; + __le16 bg_block_id_csum; + __le16 bg_inode_id_csum; + __le16 bg_itable_unused; /* Unused inodes count */ + __le16 bg_checksum; /* crc16(s_uuid+group_num+group_desc)*/ + /* following fields only exist if descriptor size is 64 */ + __le32 block_id_high; + __le32 inode_id_high; + __le32 inode_table_id_high; + __le16 free_blocks_high; + __le16 free_inodes_high; + __le16 used_dir_cnt_high; + __le16 bg_itable_unused_high; + __le32 bg_exclude_bitmap_high; + __le16 bg_block_id_csum_high; + __le16 bg_inode_id_csum_high; + __le32 bg_reserved; +}; + +/** + * struct ext2_inode - ext2 inode + * + * For details see Linux file + * Documentation/filesystems/ext4/inodes.rst. + */ +struct ext2_inode { + /** @mode: file mode */ + __le16 mode; + /** @uid: lower 16 bits of owner UID */ + __le16 uid; + /** @size: lower 32 bits of file size */ + __le32 size; + /** @atime: last access time */ + __le32 atime; + /** @ctime: last change time */ + __le32 ctime; + /** @mtime: last modification time */ + __le32 mtime; + /** @dtime: deletion time */ + __le32 dtime; + /** @gid: lower 16 bits of group ID */ + __le16 gid; + /** @nlinks: number of hard links */ + __le16 nlinks; + /** @blockcnt: lower 32 bit of block count */ + __le32 blockcnt; + /** @flags: inode flags */ + __le32 flags; + /** @osd1: operating system specific data */ + __le32 osd1; + /** @b: block map or extent tree */ + union { + struct datablocks { + __le32 dir_blocks[INDIRECT_BLOCKS]; + __le32 indir_block; + __le32 double_indir_block; + __le32 triple_indir_block; + } blocks; + char symlink[60]; + char inline_data[60]; + } b; + /** @version: file version (for NFS) */ + __le32 version; + /** @acl: lower 32 bit of extended attribute block */ + __le32 acl; + /** @size_high - dir_acl on ext2/3, upper 32 size bits on ext4 + * + * In ext2/3 this field was named i_dir_acl, though it was usually set + * to zero and never used. + */ + __le32 size_high; + /** @fragment_addr - (obsolete) fragment address */ + __le32 fragment_addr; + /** @osd2: operating system specific data */ + __le32 osd2[3]; +}; + +/* The header of an ext2 directory entry. */ +struct ext2_dirent { + __le32 inode; + __le16 direntlen; + __u8 namelen; + __u8 filetype; +}; + +struct ext2fs_node { + struct ext2_data *data; + struct ext2_inode inode; + int ino; + int inode_read; +}; + +/* Information about a "mounted" ext2 filesystem. */ +struct ext2_data { + struct ext2_sblock sblock; + struct ext2_inode *inode; + struct ext2fs_node diropen; +}; + +extern lbaint_t part_offset; + +int do_ext2ls(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[]); +int do_ext2load(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[]); +int do_ext4_load(struct cmd_tbl *cmdtp, int flag, int argc, + char *const argv[]); +int do_ext4_ls(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[]); +int do_ext4_write(struct cmd_tbl *cmdtp, int flag, int argc, + char *const argv[]); +#endif |