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219 lines
5.7 KiB
219 lines
5.7 KiB
/* SPDX-License-Identifier: GPL-2.0+ */ |
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/* |
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* (C) Copyright 2011 - 2012 Samsung Electronics |
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* EXT4 filesystem implementation in Uboot by |
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* Uma Shankar <[email protected]> |
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* Manjunatha C Achar <[email protected]> |
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* |
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* Data structures and headers for ext4 support have been taken from |
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* ext2 ls load support in Uboot |
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* |
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* (C) Copyright 2004 |
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* esd gmbh <www.esd-electronics.com> |
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* Reinhard Arlt <[email protected]> |
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* |
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* based on code from grub2 fs/ext2.c and fs/fshelp.c by |
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* GRUB -- GRand Unified Bootloader |
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* Copyright (C) 2003, 2004 Free Software Foundation, Inc. |
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*/ |
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#ifndef __EXT_COMMON__ |
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#define __EXT_COMMON__ |
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#include <command.h> |
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#define SECTOR_SIZE 0x200 |
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/* Magic value used to identify an ext2 filesystem. */ |
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#define EXT2_MAGIC 0xEF53 |
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/* Amount of indirect blocks in an inode. */ |
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#define INDIRECT_BLOCKS 12 |
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/* Maximum lenght of a pathname. */ |
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#define EXT2_PATH_MAX 4096 |
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/* Maximum nesting of symlinks, used to prevent a loop. */ |
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#define EXT2_MAX_SYMLINKCNT 8 |
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/* Filetype used in directory entry. */ |
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#define FILETYPE_UNKNOWN 0 |
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#define FILETYPE_REG 1 |
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#define FILETYPE_DIRECTORY 2 |
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#define FILETYPE_SYMLINK 7 |
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/* Filetype information as used in inodes. */ |
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#define FILETYPE_INO_MASK 0170000 |
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#define FILETYPE_INO_REG 0100000 |
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#define FILETYPE_INO_DIRECTORY 0040000 |
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#define FILETYPE_INO_SYMLINK 0120000 |
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#define EXT2_ROOT_INO 2 /* Root inode */ |
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/* The size of an ext2 block in bytes. */ |
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#define EXT2_BLOCK_SIZE(data) (1 << LOG2_BLOCK_SIZE(data)) |
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/* Log2 size of ext2 block in bytes. */ |
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#define LOG2_BLOCK_SIZE(data) (le32_to_cpu \ |
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(data->sblock.log2_block_size) \ |
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+ EXT2_MIN_BLOCK_LOG_SIZE) |
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#define EXT2_FT_DIR 2 |
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#define SUCCESS 1 |
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/* Macro-instructions used to manage several block sizes */ |
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#define EXT2_MIN_BLOCK_LOG_SIZE 10 /* 1024 */ |
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#define EXT2_MAX_BLOCK_LOG_SIZE 16 /* 65536 */ |
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#define EXT2_MIN_BLOCK_SIZE (1 << EXT2_MIN_BLOCK_LOG_SIZE) |
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#define EXT2_MAX_BLOCK_SIZE (1 << EXT2_MAX_BLOCK_LOG_SIZE) |
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/* The ext2 superblock. */ |
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struct ext2_sblock { |
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__le32 total_inodes; |
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__le32 total_blocks; |
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__le32 reserved_blocks; |
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__le32 free_blocks; |
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__le32 free_inodes; |
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__le32 first_data_block; |
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__le32 log2_block_size; |
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__le32 log2_fragment_size; |
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__le32 blocks_per_group; |
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__le32 fragments_per_group; |
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__le32 inodes_per_group; |
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__le32 mtime; |
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__le32 utime; |
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__le16 mnt_count; |
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__le16 max_mnt_count; |
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__le16 magic; |
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__le16 fs_state; |
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__le16 error_handling; |
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__le16 minor_revision_level; |
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__le32 lastcheck; |
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__le32 checkinterval; |
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__le32 creator_os; |
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__le32 revision_level; |
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__le16 uid_reserved; |
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__le16 gid_reserved; |
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__le32 first_inode; |
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__le16 inode_size; |
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__le16 block_group_number; |
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__le32 feature_compatibility; |
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__le32 feature_incompat; |
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__le32 feature_ro_compat; |
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__le32 unique_id[4]; |
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char volume_name[16]; |
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char last_mounted_on[64]; |
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__le32 compression_info; |
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uint8_t prealloc_blocks; |
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uint8_t prealloc_dir_blocks; |
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__le16 reserved_gdt_blocks; |
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uint8_t journal_uuid[16]; |
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__le32 journal_inode; |
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__le32 journal_dev; |
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__le32 last_orphan; |
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__le32 hash_seed[4]; |
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uint8_t default_hash_version; |
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uint8_t journal_backup_type; |
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__le16 descriptor_size; |
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__le32 default_mount_options; |
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__le32 first_meta_block_group; |
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__le32 mkfs_time; |
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__le32 journal_blocks[17]; |
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__le32 total_blocks_high; |
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__le32 reserved_blocks_high; |
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__le32 free_blocks_high; |
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__le16 min_extra_inode_size; |
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__le16 want_extra_inode_size; |
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__le32 flags; |
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__le16 raid_stride; |
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__le16 mmp_interval; |
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__le64 mmp_block; |
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__le32 raid_stripe_width; |
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uint8_t log2_groups_per_flex; |
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uint8_t checksum_type; |
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}; |
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struct ext2_block_group { |
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__le32 block_id; /* Blocks bitmap block */ |
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__le32 inode_id; /* Inodes bitmap block */ |
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__le32 inode_table_id; /* Inodes table block */ |
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__le16 free_blocks; /* Free blocks count */ |
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__le16 free_inodes; /* Free inodes count */ |
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__le16 used_dir_cnt; /* Directories count */ |
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__le16 bg_flags; |
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__le32 bg_exclude_bitmap; |
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__le16 bg_block_id_csum; |
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__le16 bg_inode_id_csum; |
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__le16 bg_itable_unused; /* Unused inodes count */ |
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__le16 bg_checksum; /* crc16(s_uuid+group_num+group_desc)*/ |
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/* following fields only exist if descriptor size is 64 */ |
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__le32 block_id_high; |
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__le32 inode_id_high; |
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__le32 inode_table_id_high; |
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__le16 free_blocks_high; |
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__le16 free_inodes_high; |
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__le16 used_dir_cnt_high; |
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__le16 bg_itable_unused_high; |
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__le32 bg_exclude_bitmap_high; |
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__le16 bg_block_id_csum_high; |
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__le16 bg_inode_id_csum_high; |
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__le32 bg_reserved; |
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}; |
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/* The ext2 inode. */ |
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struct ext2_inode { |
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__le16 mode; |
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__le16 uid; |
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__le32 size; |
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__le32 atime; |
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__le32 ctime; |
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__le32 mtime; |
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__le32 dtime; |
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__le16 gid; |
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__le16 nlinks; |
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__le32 blockcnt; /* Blocks of either 512 or block_size bytes */ |
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__le32 flags; |
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__le32 osd1; |
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union { |
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struct datablocks { |
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__le32 dir_blocks[INDIRECT_BLOCKS]; |
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__le32 indir_block; |
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__le32 double_indir_block; |
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__le32 triple_indir_block; |
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} blocks; |
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char symlink[60]; |
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char inline_data[60]; |
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} b; |
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__le32 version; |
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__le32 acl; |
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__le32 size_high; /* previously dir_acl, but never used */ |
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__le32 fragment_addr; |
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__le32 osd2[3]; |
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}; |
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/* The header of an ext2 directory entry. */ |
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struct ext2_dirent { |
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__le32 inode; |
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__le16 direntlen; |
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__u8 namelen; |
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__u8 filetype; |
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}; |
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struct ext2fs_node { |
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struct ext2_data *data; |
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struct ext2_inode inode; |
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int ino; |
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int inode_read; |
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}; |
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/* Information about a "mounted" ext2 filesystem. */ |
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struct ext2_data { |
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struct ext2_sblock sblock; |
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struct ext2_inode *inode; |
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struct ext2fs_node diropen; |
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}; |
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extern lbaint_t part_offset; |
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int do_ext2ls(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]); |
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int do_ext2load(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]); |
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int do_ext4_load(cmd_tbl_t *cmdtp, int flag, int argc, |
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char *const argv[]); |
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int do_ext4_ls(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[]); |
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int do_ext4_write(cmd_tbl_t *cmdtp, int flag, int argc, |
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char *const argv[]); |
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#endif
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