mirror of
https://github.com/smaeul/u-boot.git
synced 2025-11-04 05:50:17 +00:00
9aabcad1a7
Provide Sphinx style documentation for struct ext2_inode. Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com> Reviewed-by: Simon Glass <sjg@chromium.org>
266 lines
7.0 KiB
C
266 lines
7.0 KiB
C
/* 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
|