300 lines
9.4 KiB
C
300 lines
9.4 KiB
C
#ifndef _LINUX_FS_H
|
|
#define _LINUX_FS_H
|
|
|
|
/*
|
|
* This file has definitions for some important file table
|
|
* structures etc.
|
|
*/
|
|
|
|
#include <linux/limits.h>
|
|
#include <linux/wait.h>
|
|
#include <linux/types.h>
|
|
#include <linux/dirent.h>
|
|
#include <linux/vfs.h>
|
|
|
|
/* devices are as follows: (same as minix, so we can use the minix
|
|
* file system. These are major numbers.)
|
|
*
|
|
* 0 - unused (nodev)
|
|
* 1 - /dev/mem
|
|
* 2 - /dev/fd
|
|
* 3 - /dev/hd
|
|
* 4 - /dev/ttyx
|
|
* 5 - /dev/tty
|
|
* 6 - /dev/lp
|
|
* 7 -
|
|
* 8 - /dev/sd
|
|
* 9 - /dev/st
|
|
* 10 - mice
|
|
* 11 - scsi cdrom
|
|
*/
|
|
|
|
#define MAY_EXEC 1
|
|
#define MAY_WRITE 2
|
|
#define MAY_READ 4
|
|
|
|
#define READ 0
|
|
#define WRITE 1
|
|
#define READA 2 /* read-ahead - don't pause */
|
|
#define WRITEA 3 /* "write-ahead" - silly, but somewhat useful */
|
|
|
|
extern void buffer_init(void);
|
|
extern void inode_init(void);
|
|
|
|
#define MAJOR(a) (((unsigned)(a))>>8)
|
|
#define MINOR(a) ((a)&0xff)
|
|
|
|
#ifndef NULL
|
|
#define NULL ((void *) 0)
|
|
#endif
|
|
|
|
#define NIL_FILP ((struct file *)0)
|
|
#define SEL_IN 1
|
|
#define SEL_OUT 2
|
|
#define SEL_EX 4
|
|
|
|
/*
|
|
* These are the fs-independent mount-flags: up to 16 flags are supported
|
|
*/
|
|
#define MS_RDONLY 1 /* mount read-only */
|
|
#define MS_NOSUID 2 /* ignore suid and sgid bits */
|
|
#define MS_NODEV 4 /* disallow access to device special files */
|
|
#define MS_NOEXEC 8 /* disallow program execution */
|
|
#define MS_SYNC 16 /* writes are synced at once */
|
|
|
|
/*
|
|
* Note that read-only etc flags are inode-specific: setting some file-system
|
|
* flags just means all the inodes inherit those flags by default. It might be
|
|
* possible to overrride it sevelctively if you really wanted to with some
|
|
* ioctl() that is not currently implemented.
|
|
*/
|
|
#define IS_RDONLY(inode) ((inode)->i_flags & MS_RDONLY)
|
|
#define IS_NOSUID(inode) ((inode)->i_flags & MS_NOSUID)
|
|
#define IS_NODEV(inode) ((inode)->i_flags & MS_NODEV)
|
|
#define IS_NOEXEC(inode) ((inode)->i_flags & MS_NOEXEC)
|
|
#define IS_SYNC(inode) ((inode)->i_flags & MS_SYNC)
|
|
|
|
/* the read-only stuff doesn't really belong here, but any other place is
|
|
probably as bad and I don't want to create yet another include file. */
|
|
|
|
#define BLKROSET 4701 /* set device read-only (0 = read-write) */
|
|
#define BLKROGET 4702 /* get read-only status (0 = read_write) */
|
|
#define BLKRRPART 4703 /* re-read partition table */
|
|
|
|
#define BMAP_IOCTL 1 /* obsolete - kept for compatibility */
|
|
#define FIBMAP 1 /* bmap access */
|
|
#define FIGETBSZ 2 /* get the block size used for bmap */
|
|
|
|
typedef char buffer_block[BLOCK_SIZE];
|
|
|
|
struct buffer_head {
|
|
char * b_data; /* pointer to data block (1024 bytes) */
|
|
unsigned long b_size; /* block size */
|
|
unsigned long b_blocknr; /* block number */
|
|
dev_t b_dev; /* device (0 = free) */
|
|
unsigned short b_count; /* users using this block */
|
|
unsigned char b_uptodate;
|
|
unsigned char b_dirt; /* 0-clean,1-dirty */
|
|
unsigned char b_lock; /* 0 - ok, 1 -locked */
|
|
struct wait_queue * b_wait;
|
|
struct buffer_head * b_prev; /* doubly linked list of hash-queue */
|
|
struct buffer_head * b_next;
|
|
struct buffer_head * b_prev_free; /* doubly linked list of buffers */
|
|
struct buffer_head * b_next_free;
|
|
struct buffer_head * b_this_page; /* circular list of buffers in one page */
|
|
struct buffer_head * b_reqnext; /* request queue */
|
|
};
|
|
|
|
#include <linux/pipe_fs_i.h>
|
|
#include <linux/minix_fs_i.h>
|
|
#include <linux/ext_fs_i.h>
|
|
#include <linux/msdos_fs_i.h>
|
|
#include <linux/iso_fs_i.h>
|
|
|
|
struct inode {
|
|
dev_t i_dev;
|
|
unsigned long i_ino;
|
|
umode_t i_mode;
|
|
nlink_t i_nlink;
|
|
uid_t i_uid;
|
|
gid_t i_gid;
|
|
dev_t i_rdev;
|
|
off_t i_size;
|
|
time_t i_atime;
|
|
time_t i_mtime;
|
|
time_t i_ctime;
|
|
unsigned long i_blksize;
|
|
unsigned long i_blocks;
|
|
struct inode_operations * i_op;
|
|
struct super_block * i_sb;
|
|
struct wait_queue * i_wait;
|
|
struct file_lock * i_flock;
|
|
struct vm_area_struct * i_mmap;
|
|
unsigned short i_count;
|
|
unsigned short i_flags;
|
|
unsigned char i_lock;
|
|
unsigned char i_dirt;
|
|
unsigned char i_pipe;
|
|
unsigned char i_mount;
|
|
unsigned char i_seek;
|
|
unsigned char i_update;
|
|
union {
|
|
struct pipe_inode_info pipe_i;
|
|
struct minix_inode_info minix_i;
|
|
struct ext_inode_info ext_i;
|
|
struct msdos_inode_info msdos_i;
|
|
struct iso_inode_info isofs_i;
|
|
} u;
|
|
};
|
|
|
|
struct file {
|
|
mode_t f_mode;
|
|
dev_t f_rdev; /* needed for /dev/tty */
|
|
off_t f_pos;
|
|
unsigned short f_flags;
|
|
unsigned short f_count;
|
|
unsigned short f_reada;
|
|
struct inode * f_inode;
|
|
struct file_operations * f_op;
|
|
};
|
|
|
|
struct file_lock {
|
|
struct file_lock *fl_next; /* singly linked list */
|
|
struct task_struct *fl_owner; /* NULL if on free list, for sanity checks */
|
|
struct wait_queue *fl_wait;
|
|
char fl_type;
|
|
char fl_whence;
|
|
off_t fl_start;
|
|
off_t fl_end;
|
|
};
|
|
|
|
#include <linux/minix_fs_sb.h>
|
|
#include <linux/ext_fs_sb.h>
|
|
#include <linux/msdos_fs_sb.h>
|
|
#include <linux/iso_fs_sb.h>
|
|
|
|
struct super_block {
|
|
dev_t s_dev;
|
|
unsigned long s_blocksize;
|
|
unsigned char s_lock;
|
|
unsigned char s_rd_only;
|
|
unsigned char s_dirt;
|
|
struct super_operations *s_op;
|
|
unsigned long s_flags;
|
|
unsigned long s_magic;
|
|
unsigned long s_time;
|
|
struct inode * s_covered;
|
|
struct inode * s_mounted;
|
|
struct wait_queue * s_wait;
|
|
union {
|
|
struct minix_sb_info minix_sb;
|
|
struct ext_sb_info ext_sb;
|
|
struct msdos_sb_info msdos_sb;
|
|
struct isofs_sb_info isofs_sb;
|
|
} u;
|
|
};
|
|
|
|
struct file_operations {
|
|
int (*lseek) (struct inode *, struct file *, off_t, int);
|
|
int (*read) (struct inode *, struct file *, char *, int);
|
|
int (*write) (struct inode *, struct file *, char *, int);
|
|
int (*readdir) (struct inode *, struct file *, struct dirent *, int count);
|
|
int (*select) (struct inode *, struct file *, int, select_table *);
|
|
int (*ioctl) (struct inode *, struct file *, unsigned int, unsigned int);
|
|
int (*mmap) (void);
|
|
int (*open) (struct inode *, struct file *);
|
|
void (*release) (struct inode *, struct file *);
|
|
};
|
|
|
|
struct inode_operations {
|
|
struct file_operations * default_file_ops;
|
|
int (*create) (struct inode *,const char *,int,int,struct inode **);
|
|
int (*lookup) (struct inode *,const char *,int,struct inode **);
|
|
int (*link) (struct inode *,struct inode *,const char *,int);
|
|
int (*unlink) (struct inode *,const char *,int);
|
|
int (*symlink) (struct inode *,const char *,int,const char *);
|
|
int (*mkdir) (struct inode *,const char *,int,int);
|
|
int (*rmdir) (struct inode *,const char *,int);
|
|
int (*mknod) (struct inode *,const char *,int,int,int);
|
|
int (*rename) (struct inode *,const char *,int,struct inode *,const char *,int);
|
|
int (*readlink) (struct inode *,char *,int);
|
|
int (*follow_link) (struct inode *, struct inode *, int flag, int mode, struct inode ** res_inode);
|
|
int (*bmap) (struct inode *,int);
|
|
void (*truncate) (struct inode *);
|
|
};
|
|
|
|
struct super_operations {
|
|
void (*read_inode)(struct inode *inode);
|
|
void (*write_inode) (struct inode *inode);
|
|
void (*put_inode) (struct inode *inode);
|
|
void (*put_super)(struct super_block *sb);
|
|
void (*write_super) (struct super_block *sb);
|
|
void (*statfs) (struct super_block *sb, struct statfs *buf);
|
|
};
|
|
|
|
struct file_system_type {
|
|
struct super_block *(*read_super)(struct super_block *sb,void *mode);
|
|
char *name;
|
|
};
|
|
|
|
extern struct file_operations * chrdev_fops[MAX_CHRDEV];
|
|
extern struct file_operations * blkdev_fops[MAX_BLKDEV];
|
|
|
|
extern struct file_system_type *get_fs_type(char *name);
|
|
|
|
extern int fs_may_mount(dev_t dev);
|
|
extern int fs_may_umount(dev_t dev, struct inode * mount_root);
|
|
|
|
extern struct file file_table[NR_FILE];
|
|
extern struct super_block super_block[NR_SUPER];
|
|
|
|
extern void grow_buffers(int size);
|
|
extern int shrink_buffers(unsigned int priority);
|
|
|
|
extern int nr_buffers;
|
|
extern int nr_buffer_heads;
|
|
|
|
extern void check_disk_change(dev_t dev);
|
|
extern void invalidate_inodes(dev_t dev);
|
|
extern void invalidate_buffers(dev_t dev);
|
|
extern int floppy_change(struct buffer_head * first_block);
|
|
extern int ticks_to_floppy_on(unsigned int dev);
|
|
extern void floppy_on(unsigned int dev);
|
|
extern void floppy_off(unsigned int dev);
|
|
extern void sync_inodes(dev_t dev);
|
|
extern void sync_dev(dev_t dev);
|
|
extern void sync_supers(dev_t dev);
|
|
extern int bmap(struct inode * inode,int block);
|
|
extern int namei(const char * pathname, struct inode ** res_inode);
|
|
extern int lnamei(const char * pathname, struct inode ** res_inode);
|
|
extern int permission(struct inode * inode,int mask);
|
|
extern int open_namei(const char * pathname, int flag, int mode,
|
|
struct inode ** res_inode, struct inode * base);
|
|
extern int do_mknod(const char * filename, int mode, dev_t dev);
|
|
extern void iput(struct inode * inode);
|
|
extern struct inode * iget(struct super_block * sb,int nr);
|
|
extern struct inode * get_empty_inode(void);
|
|
extern struct inode * get_pipe_inode(void);
|
|
extern struct file * get_empty_filp(void);
|
|
extern struct buffer_head * get_hash_table(dev_t dev, int block, int size);
|
|
extern struct buffer_head * getblk(dev_t dev, int block, int size);
|
|
extern void ll_rw_block(int rw, struct buffer_head * bh);
|
|
extern void ll_rw_page(int rw, int dev, int nr, char * buffer);
|
|
extern void ll_rw_swap_file(int rw, int dev, unsigned int *b, int nb, char *buffer);
|
|
extern void brelse(struct buffer_head * buf);
|
|
extern struct buffer_head * bread(dev_t dev, int block, int size);
|
|
extern void bread_page(unsigned long addr,dev_t dev,int b[4]);
|
|
extern struct buffer_head * breada(dev_t dev,int block,...);
|
|
extern void put_super(dev_t dev);
|
|
extern dev_t ROOT_DEV;
|
|
|
|
extern void mount_root(void);
|
|
|
|
extern int char_read(struct inode *, struct file *, char *, int);
|
|
extern int block_read(struct inode *, struct file *, char *, int);
|
|
|
|
extern int char_write(struct inode *, struct file *, char *, int);
|
|
extern int block_write(struct inode *, struct file *, char *, int);
|
|
|
|
#endif
|