157 lines
4.3 KiB
C++
157 lines
4.3 KiB
C++
// ext2.h
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// ext2 filesystem driver for HOS
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// Author: Josh Holtrop
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// Date: 05/10/05
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// Modified: 05/23/05
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#ifndef __HOS_EXT2_H__
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#define __HOS_EXT2_H__ __HOS_EXT2_H__
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#define EXT2_MAGIC 0xEF53
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#define EXT2_NAME_LEN 255
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#define EXT2_I_MODE_ATTR_MASK 0x0FFF
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#define EXT2_I_MODE_OX 0x0001
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#define EXT2_I_MODE_OW 0x0002
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#define EXT2_I_MODE_OR 0x0004
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#define EXT2_I_MODE_GX 0x0008
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#define EXT2_I_MODE_GW 0x0010
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#define EXT2_I_MODE_GR 0x0020
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#define EXT2_I_MODE_UX 0x0040
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#define EXT2_I_MODE_UW 0x0080
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#define EXT2_I_MODE_UR 0x0100
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#define EXT2_I_MODE_STICKY 0x0200
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#define EXT2_I_MODE_SGID 0x0400
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#define EXT2_I_MODE_SUID 0x0800
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#define EXT2_I_MODE_TYPE_MASK 0xF000
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#define EXT2_I_MODE_FIFO 0x1000
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#define EXT2_I_MODE_CHAR 0x2000
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#define EXT2_I_MODE_DIR 0x4000
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#define EXT2_I_MODE_BLOCK 0x6000
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#define EXT2_I_MODE_FILE 0x8000
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#define EXT2_I_MODE_SYM 0xA000
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#define EXT2_I_MODE_SOCK 0xC000
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#define EXT2_I_FLAGS_SEC_DEL 0x01
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#define EXT2_I_FLAGS_UNDELETE 0x02
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#define EXT2_I_FLAGS_COMPRESS 0x04
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#define EXT2_I_FLAGS_SYNC 0x08
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#define EXT2_I_FLAGS_IMMUTABLE 0x10
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#define EXT2_I_FLAGS_APPEND 0x20
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#define EXT2_I_FLAGS_NODUMP 0x40
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#define EXT2_INODE_BAD_BLOCKS 1
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#define EXT2_INODE_ROOT 2
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#define EXT2_INODE_ACL_INDEX 3
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#define EXT2_INODE_ACL_DATA 4
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#define EXT2_INODE_BOOT_LOADER 5
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#define EXT2_INODE_UNDELETE_DIR 6
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#define EXT2_INODE_AVAIL 11
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#define EXT2_FT_UNKNOWN 0
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#define EXT2_FT_FILE 1
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#define EXT2_FT_DIR 2
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#define EXT2_FT_CHAR 3
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#define EXT2_FT_BLOCK 4
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#define EXT2_FT_FIFO 5
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#define EXT2_FT_SOCK 6
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#define EXT2_FT_SYMLINK 7
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#define EXT2_FT_MAX 8
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#include "fs/vfs.h"
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typedef struct
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{
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u32_t s_inodes_count; /* Inodes count */
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u32_t s_blocks_count; /* Blocks count */
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u32_t s_r_blocks_count; /* Reserved blocks count */
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u32_t s_free_blocks_count; /* Free blocks count */
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u32_t s_free_inodes_count; /* Free inodes count */
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u32_t s_first_data_block; /* First Data Block */
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u32_t s_log_block_size; /* Block size: 0->1024, 1->2048, 2->4096 */
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int s_log_frag_size; /* Fragment size */
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u32_t s_blocks_per_group; /* # Blocks per group */
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u32_t s_frags_per_group; /* # Fragments per group */
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u32_t s_inodes_per_group; /* # Inodes per group */
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u32_t s_mtime; /* Mount time */
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u32_t s_wtime; /* Write time */
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u16_t s_mnt_count; /* Mount count */
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short s_max_mnt_count; /* Maximal mount count */
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u16_t s_magic; /* Magic signature */
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u16_t s_state; /* File system state */
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u16_t s_errors; /* Behaviour when detecting errors */
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u16_t s_minor_rev_level; /* minor revision level */
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u32_t s_lastcheck; /* time of last check */
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u32_t s_checkinterval; /* max. time between checks */
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u32_t s_creator_os; /* OS */
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u32_t s_rev_level; /* Revision level */
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u16_t s_def_resuid; /* Default uid for reserved blocks */
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u16_t s_def_resgid; /* Default gid for reserved blocks */
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u32_t s_reserved[235];
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} ext2_super_block_t;
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typedef struct
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{
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u32_t bg_block_bitmap; // Blocks bitmap block
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u32_t bg_inode_bitmap; // Inode bitmap block
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u32_t bg_inode_table; // Inode table block
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u16_t bg_free_blocks_count; // Free blocks count
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u16_t bg_free_inodes_count; // Free Inodes count
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u16_t bg_used_dirs_count; // Directories count
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u16_t bg_pad1;
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u32_t bg_reserved[3];
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} ext2_group_desc_t;
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typedef struct
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{
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u16_t i_mode; // File mode
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u16_t i_uid; // Owner UID
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u32_t i_size; // Size in bytes
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u32_t i_atime; // Access time
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u32_t i_ctime; // Creation time
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u32_t i_mtime; // Modification time
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u32_t i_dtime; // Deletion time
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u16_t i_gid; // Group ID
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u16_t i_links_count; // Links count
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u32_t i_blocks; // Blocks count
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u32_t i_flags; // File flags
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u32_t i_reserved1;
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u32_t i_block[15]; // Pointers to blocks (12 direct, single, double, triple indirect)
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u32_t i_version; // File version (for NFS)
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u32_t i_file_acl; // File ACL
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u32_t i_dir_acl; // Directory ACL
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u32_t i_faddr; // Fragment address
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u8_t i_frag; // Fragment number
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u8_t i_fsize; // Fragment size
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u16_t i_pad1;
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u32_t i_reserved2[2];
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} ext2_inode_t;
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typedef struct
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{
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u32_t inode; // inode number
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u16_t length; // directory entry length
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u8_t name_length; // name length
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u8_t file_type; // File type
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char name[EXT2_NAME_LEN];
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} ext2_dir_entry_t;
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#ifdef _HOS_CPP_
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class Ext2fs : public FileSystem
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{
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protected:
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ext2_super_block_t mySuper;
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int mySuperDirty;
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public:
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Ext2fs(device_t dev);
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~Ext2fs();
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};
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#endif
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#endif
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