diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/ext2fs.h | 81 | ||||
| -rw-r--r-- | include/ext4fs.h | 132 | ||||
| -rw-r--r-- | include/ext_common.h | 197 |
3 files changed, 329 insertions, 81 deletions
diff --git a/include/ext2fs.h b/include/ext2fs.h deleted file mode 100644 index 163a9bbc0..000000000 --- a/include/ext2fs.h +++ /dev/null @@ -1,81 +0,0 @@ -/* - * GRUB -- GRand Unified Bootloader - * Copyright (C) 2000, 2001 Free Software Foundation, Inc. - * - * (C) Copyright 2003 Sysgo Real-Time Solutions, AG <www.elinos.com> - * Pavel Bartusek <pba@sysgo.de> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - */ - -/* An implementation for the Ext2FS filesystem ported from GRUB. - * Some parts of this code (mainly the structures and defines) are - * from the original ext2 fs code, as found in the linux kernel. - */ - - -#define SECTOR_SIZE 0x200 -#define SECTOR_BITS 9 - -/* Error codes */ -typedef enum -{ - ERR_NONE = 0, - ERR_BAD_FILENAME, - ERR_BAD_FILETYPE, - ERR_BAD_GZIP_DATA, - ERR_BAD_GZIP_HEADER, - ERR_BAD_PART_TABLE, - ERR_BAD_VERSION, - ERR_BELOW_1MB, - ERR_BOOT_COMMAND, - ERR_BOOT_FAILURE, - ERR_BOOT_FEATURES, - ERR_DEV_FORMAT, - ERR_DEV_VALUES, - ERR_EXEC_FORMAT, - ERR_FILELENGTH, - ERR_FILE_NOT_FOUND, - ERR_FSYS_CORRUPT, - ERR_FSYS_MOUNT, - ERR_GEOM, - ERR_NEED_LX_KERNEL, - ERR_NEED_MB_KERNEL, - ERR_NO_DISK, - ERR_NO_PART, - ERR_NUMBER_PARSING, - ERR_OUTSIDE_PART, - ERR_READ, - ERR_SYMLINK_LOOP, - ERR_UNRECOGNIZED, - ERR_WONT_FIT, - ERR_WRITE, - ERR_BAD_ARGUMENT, - ERR_UNALIGNED, - ERR_PRIVILEGED, - ERR_DEV_NEED_INIT, - ERR_NO_DISK_SPACE, - ERR_NUMBER_OVERFLOW, - - MAX_ERR_NUM -} ext2fs_error_t; - - -extern int ext2fs_set_blk_dev(block_dev_desc_t *rbdd, int part); -extern int ext2fs_ls (const char *dirname); -extern int ext2fs_open (const char *filename); -extern int ext2fs_read (char *buf, unsigned len); -extern int ext2fs_mount (unsigned part_length); -extern int ext2fs_close(void); diff --git a/include/ext4fs.h b/include/ext4fs.h new file mode 100644 index 000000000..58a6a1dcf --- /dev/null +++ b/include/ext4fs.h @@ -0,0 +1,132 @@ +/* + * (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> + * + * Ext4 Extent data structures are taken from original ext4 fs code + * as found in the linux kernel. + * + * Copyright (c) 2003-2006, Cluster File Systems, Inc, info@clusterfs.com + * Written by Alex Tomas <alex@clusterfs.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#ifndef __EXT4__ +#define __EXT4__ +#include <ext_common.h> + +#define EXT4_EXTENTS_FL 0x00080000 /* Inode uses extents */ +#define EXT4_EXT_MAGIC 0xf30a +#define EXT4_FEATURE_RO_COMPAT_GDT_CSUM 0x0010 +#define EXT4_FEATURE_INCOMPAT_EXTENTS 0x0040 +#define EXT4_INDIRECT_BLOCKS 12 + +#define EXT4_BG_INODE_UNINIT 0x0001 +#define EXT4_BG_BLOCK_UNINIT 0x0002 +#define EXT4_BG_INODE_ZEROED 0x0004 + +/* + * ext4_inode has i_block array (60 bytes total). + * The first 12 bytes store ext4_extent_header; + * the remainder stores an array of ext4_extent. + */ + +/* + * This is the extent on-disk structure. + * It's used at the bottom of the tree. + */ +struct ext4_extent { + __le32 ee_block; /* first logical block extent covers */ + __le16 ee_len; /* number of blocks covered by extent */ + __le16 ee_start_hi; /* high 16 bits of physical block */ + __le32 ee_start_lo; /* low 32 bits of physical block */ +}; + +/* + * This is index on-disk structure. + * It's used at all the levels except the bottom. + */ +struct ext4_extent_idx { + __le32 ei_block; /* index covers logical blocks from 'block' */ + __le32 ei_leaf_lo; /* pointer to the physical block of the next * + * level. leaf or next index could be there */ + __le16 ei_leaf_hi; /* high 16 bits of physical block */ + __u16 ei_unused; +}; + +/* Each block (leaves and indexes), even inode-stored has header. */ +struct ext4_extent_header { + __le16 eh_magic; /* probably will support different formats */ + __le16 eh_entries; /* number of valid entries */ + __le16 eh_max; /* capacity of store in entries */ + __le16 eh_depth; /* has tree real underlying blocks? */ + __le32 eh_generation; /* generation of the tree */ +}; + +struct ext_filesystem { + /* Total Sector of partition */ + uint64_t total_sect; + /* Block size of partition */ + uint32_t blksz; + /* Inode size of partition */ + uint32_t inodesz; + /* Sectors per Block */ + uint32_t sect_perblk; + /* Group Descriptor Block Number */ + uint32_t gdtable_blkno; + /* Total block groups of partition */ + uint32_t no_blkgrp; + /* No of blocks required for bgdtable */ + uint32_t no_blk_pergdt; + /* Superblock */ + struct ext2_sblock *sb; + /* Block group descritpor table */ + struct ext2_block_group *gd; + char *gdtable; + + /* Block Bitmap Related */ + unsigned char **blk_bmaps; + long int curr_blkno; + uint16_t first_pass_bbmap; + + /* Inode Bitmap Related */ + unsigned char **inode_bmaps; + int curr_inode_no; + uint16_t first_pass_ibmap; + + /* Journal Related */ + + /* Block Device Descriptor */ + block_dev_desc_t *dev_desc; +}; + +extern block_dev_desc_t *ext4_dev_desc; +extern struct ext2_data *ext4fs_root; +extern struct ext2fs_node *ext4fs_file; + +struct ext_filesystem *get_fs(void); +int init_fs(block_dev_desc_t *dev_desc); +void deinit_fs(block_dev_desc_t *dev_desc); +int ext4fs_open(const char *filename); +int ext4fs_read(char *buf, unsigned len); +int ext4fs_mount(unsigned part_length); +void ext4fs_close(void); +int ext4fs_ls(const char *dirname); +void ext4fs_free_node(struct ext2fs_node *node, struct ext2fs_node *currroot); +int ext4fs_devread(int sector, int byte_offset, int byte_len, char *buf); +int ext4fs_set_blk_dev(block_dev_desc_t *rbdd, int part); +long int read_allocated_block(struct ext2_inode *inode, int fileblock); +#endif diff --git a/include/ext_common.h b/include/ext_common.h new file mode 100644 index 000000000..c90d95b00 --- /dev/null +++ b/include/ext_common.h @@ -0,0 +1,197 @@ +/* + * (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. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#ifndef __EXT_COMMON__ +#define __EXT_COMMON__ +#include <command.h> +#define SECTOR_SIZE 0x200 +#define SECTOR_BITS 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 + +/* 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 */ + +/* Bits used as offset in sector */ +#define DISK_SECTOR_BITS 9 +/* The size of an ext2 block in bytes. */ +#define EXT2_BLOCK_SIZE(data) (1 << LOG2_BLOCK_SIZE(data)) + +/* Log2 size of ext2 block in 512 blocks. */ +#define LOG2_EXT2_BLOCK_SIZE(data) (__le32_to_cpu \ + (data->sblock.log2_block_size) + 1) + +/* Log2 size of ext2 block in bytes. */ +#define LOG2_BLOCK_SIZE(data) (__le32_to_cpu \ + (data->sblock.log2_block_size) + 10) +#define INODE_SIZE_FILESYSTEM(data) (__le32_to_cpu \ + (data->sblock.inode_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 { + uint32_t total_inodes; + uint32_t total_blocks; + uint32_t reserved_blocks; + uint32_t free_blocks; + uint32_t free_inodes; + uint32_t first_data_block; + uint32_t log2_block_size; + uint32_t log2_fragment_size; + uint32_t blocks_per_group; + uint32_t fragments_per_group; + uint32_t inodes_per_group; + uint32_t mtime; + uint32_t utime; + uint16_t mnt_count; + uint16_t max_mnt_count; + uint16_t magic; + uint16_t fs_state; + uint16_t error_handling; + uint16_t minor_revision_level; + uint32_t lastcheck; + uint32_t checkinterval; + uint32_t creator_os; + uint32_t revision_level; + uint16_t uid_reserved; + uint16_t gid_reserved; + uint32_t first_inode; + uint16_t inode_size; + uint16_t block_group_number; + uint32_t feature_compatibility; + uint32_t feature_incompat; + uint32_t feature_ro_compat; + uint32_t unique_id[4]; + char volume_name[16]; + char last_mounted_on[64]; + uint32_t compression_info; +}; + +struct ext2_block_group { + __u32 block_id; /* Blocks bitmap block */ + __u32 inode_id; /* Inodes bitmap block */ + __u32 inode_table_id; /* Inodes table block */ + __u16 free_blocks; /* Free blocks count */ + __u16 free_inodes; /* Free inodes count */ + __u16 used_dir_cnt; /* Directories count */ + __u16 bg_flags; + __u32 bg_reserved[2]; + __u16 bg_itable_unused; /* Unused inodes count */ + __u16 bg_checksum; /* crc16(s_uuid+grouo_num+group_desc)*/ +}; + +/* The ext2 inode. */ +struct ext2_inode { + uint16_t mode; + uint16_t uid; + uint32_t size; + uint32_t atime; + uint32_t ctime; + uint32_t mtime; + uint32_t dtime; + uint16_t gid; + uint16_t nlinks; + uint32_t blockcnt; /* Blocks of 512 bytes!! */ + uint32_t flags; + uint32_t osd1; + union { + struct datablocks { + uint32_t dir_blocks[INDIRECT_BLOCKS]; + uint32_t indir_block; + uint32_t double_indir_block; + uint32_t triple_indir_block; + } blocks; + char symlink[60]; + } b; + uint32_t version; + uint32_t acl; + uint32_t dir_acl; + uint32_t fragment_addr; + uint32_t osd2[3]; +}; + +/* The header of an ext2 directory entry. */ +struct ext2_dirent { + uint32_t inode; + uint16_t direntlen; + uint8_t namelen; + uint8_t 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; +}; + +int do_ext2ls(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]); +int do_ext2load(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]); +int do_ext4_load(cmd_tbl_t *cmdtp, int flag, int argc, + char *const argv[]); +int do_ext4_ls(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[]); +int do_ext_load(cmd_tbl_t *cmdtp, int flag, int argc, + char *const argv[]); +int do_ext_ls(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[]); +#endif |