mirror of
https://github.com/reactos/reactos.git
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133 lines
3.8 KiB
C
133 lines
3.8 KiB
C
#include <ntddk.h>
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#include <ntifs.h>
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#define MINIX_ROOT_INO 1
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/* Not the same as the bogus LINK_MAX in <linux/limits.h>. Oh well. */
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#define MINIX_LINK_MAX 250
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#define MINIX_I_MAP_SLOTS 8
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#define MINIX_Z_MAP_SLOTS 64
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#define MINIX_SUPER_MAGIC 0x137F /* original minix fs */
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#define MINIX_SUPER_MAGIC2 0x138F /* minix fs, 30 char names */
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#define MINIX2_SUPER_MAGIC 0x2468 /* minix V2 fs */
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#define MINIX2_SUPER_MAGIC2 0x2478 /* minix V2 fs, 30 char names */
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#define MINIX_VALID_FS 0x0001 /* Clean fs. */
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#define MINIX_ERROR_FS 0x0002 /* fs has errors. */
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#define MINIX_INODES_PER_BLOCK ((BLOCKSIZE)/(sizeof (struct minix_inode)))
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#define MINIX2_INODES_PER_BLOCK ((BLOCKSIZE)/(sizeof (struct minix2_inode)))
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#define MINIX_V1 0x0001 /* original minix fs */
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#define MINIX_V2 0x0002 /* minix V2 fs */
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/*
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* This is the original minix inode layout on disk.
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* Note the 8-bit gid and atime and ctime.
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*/
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struct minix_inode {
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unsigned short int i_mode;
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unsigned short int i_uid;
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unsigned long i_size;
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unsigned long i_time;
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unsigned char i_gid;
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unsigned char i_nlinks;
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unsigned short int i_zone[9];
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};
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/*
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* The new minix inode has all the time entries, as well as
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* long block numbers and a third indirect block (7+1+1+1
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* instead of 7+1+1). Also, some previously 8-bit values are
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* now 16-bit. The inode is now 64 bytes instead of 32.
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*/
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struct minix2_inode {
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unsigned short int i_mode;
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unsigned short int i_nlinks;
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unsigned short int i_uid;
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unsigned short int i_gid;
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unsigned long i_size;
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unsigned long i_atime;
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unsigned long i_mtime;
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unsigned long i_ctime;
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unsigned long i_zone[10];
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};
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/*
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* minix super-block data on disk
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*/
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struct minix_super_block {
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unsigned short int s_ninodes;
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unsigned short int s_nzones;
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unsigned short int s_imap_blocks;
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unsigned short int s_zmap_blocks;
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unsigned short int s_firstdatazone;
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unsigned short int s_log_zone_size;
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unsigned long s_max_size;
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unsigned short int s_magic;
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unsigned short int s_state;
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unsigned long s_zones;
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};
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struct minix_dir_entry {
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unsigned short int inode;
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char name[0];
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};
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#define MINIX_DIR_ENTRY_SIZE (sizeof(struct minix_dir_entry)+30)
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BOOLEAN MinixReadSector(IN PDEVICE_OBJECT pDeviceObject,
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IN ULONG DiskSector,
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IN PVOID Buffer);
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BOOLEAN MinixWriteSector(IN PDEVICE_OBJECT pDeviceObject,
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IN ULONG DiskSector,
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IN PVOID Buffer);
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#define BLOCKSIZE (1024)
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//extern PDRIVER_OBJECT DriverObject;
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typedef struct
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{
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PDEVICE_OBJECT AttachedDevice;
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struct minix_inode root_inode;
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char superblock_buf[BLOCKSIZE];
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struct minix_super_block* sb;
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PFILE_OBJECT FileObject;
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} MINIX_DEVICE_EXTENSION, *PMINIX_DEVICE_EXTENSION;
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typedef struct
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{
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struct minix_inode inode;
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} MINIX_FSCONTEXT, *PMINIX_FSCONTEXT;
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NTSTATUS STDCALL MinixCreate(PDEVICE_OBJECT DeviceObject, PIRP Irp);
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NTSTATUS STDCALL MinixClose(PDEVICE_OBJECT DeviceObject, PIRP Irp);
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NTSTATUS STDCALL MinixWrite(PDEVICE_OBJECT DeviceObject, PIRP Irp);
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NTSTATUS STDCALL MinixRead(PDEVICE_OBJECT DeviceObject, PIRP Irp);
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NTSTATUS STDCALL MinixDirectoryControl(PDEVICE_OBJECT DeviceObject, PIRP Irp);
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ULONG MinixNewInode(PDEVICE_OBJECT Volume,
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MINIX_DEVICE_EXTENSION* DeviceExt,
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struct minix_inode* new_inode);
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NTSTATUS MinixWriteInode(PDEVICE_OBJECT Volume,
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MINIX_DEVICE_EXTENSION* DeviceExt,
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ULONG ino,
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struct minix_inode* result);
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NTSTATUS MinixReadInode(PDEVICE_OBJECT DeviceObject,
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MINIX_DEVICE_EXTENSION* DeviceExt,
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ULONG ino,
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struct minix_inode* result);
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NTSTATUS MinixDeleteInode(PDEVICE_OBJECT Volume,
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MINIX_DEVICE_EXTENSION* DeviceExt,
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ULONG ino);
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NTSTATUS MinixReadBlock(PDEVICE_OBJECT DeviceObject,
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PMINIX_DEVICE_EXTENSION DeviceExt,
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struct minix_inode* inode,
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ULONG FileOffset,
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PULONG DiskOffset);
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BOOLEAN MinixReadPage(PDEVICE_OBJECT DeviceObject,
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ULONG Offset,
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PVOID Buffer);
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