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lxapi32.zip
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fs.h
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2002-04-26
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/* $Id: fs.h,v 1.2 2002/04/26 23:09:05 smilcke Exp $ */
#ifndef _LINUX_FS_H
#define _LINUX_FS_H
/*
* It's silly to have NR_OPEN bigger than NR_FILE, but you can change
* the file limit at runtime and only root can increase the per-process
* nr_file rlimit, so it's safe to set up a ridiculously high absolute
* upper limit on files-per-process.
*
* Some programs (notably those using select()) may have to be
* recompiled to take full advantage of the new limits..
*/
#include <linux/types.h>
#include <linux/fcntl.h>
#include <linux/signal.h>
#include <linux/kdev_t.h>
#include <linux/wait.h>
#include <linux/list.h>
#include <linux/dcache.h>
#include <linux/vmalloc.h>
#include <linux/tqueue.h>
#define FALSE 0
#define TRUE 1
/* Fixed constants first: */
#undef NR_OPEN
#define NR_OPEN (1024*1024) /* Absolute upper limit on fd num */
#define INR_OPEN 1024 /* Initial setting for nfile rlimits */
#define BLOCK_SIZE_BITS 10
#define BLOCK_SIZE (1<<BLOCK_SIZE_BITS)
#include <asm/semaphor.h>
#include <asm/bitops.h>
#define NR_FILE 8192 /* this can well be larger on a larger system */
#define NR_RESERVED_FILES 10 /* reserved for root */
#define NR_SUPER 256
#define MAY_EXEC 1
#define MAY_WRITE 2
#define MAY_READ 4
#define FMODE_READ 1
#define FMODE_WRITE 2
#define READ 0
#define WRITE 1
#define READA 2 /* read-ahead - don't block if no resources */
#define WRITERAW 5 /* raw write - don't play with buffer lists */
#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
/* public flags for file_system_type */
#define FS_REQUIRES_DEV 1
#define FS_NO_DCACHE 2 /* Only dcache the necessary things. */
#define FS_NO_PRELIM 4 /* prevent preloading of dentries, even if
* FS_NO_DCACHE is not set.
*/
#define FS_IBASKET 8 /* FS does callback to free_ibasket() if space gets low. */
/*
* 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_SYNCHRONOUS 16 /* Writes are synced at once */
#define MS_REMOUNT 32 /* Alter flags of a mounted FS */
#define MS_MANDLOCK 64 /* Allow mandatory locks on an FS */
#define S_QUOTA 128 /* Quota initialized for file/directory/symlink */
#define S_APPEND 256 /* Append-only file */
#define S_IMMUTABLE 512 /* Immutable file */
#define MS_NOATIME 1024 /* Do not update access times. */
#define MS_NODIRATIME 2048 /* Do not update directory access times */
#define MS_ODD_RENAME 32768 /* Temporary stuff; will go away as soon
* as nfs_rename() will be cleaned up
*/
/*
* Flags that can be altered by MS_REMOUNT
*/
#define MS_RMT_MASK (MS_RDONLY|MS_NOSUID|MS_NODEV|MS_NOEXEC|\
MS_SYNCHRONOUS|MS_MANDLOCK|MS_NOATIME|MS_NODIRATIME)
/*
* Magic mount flag number. Has to be or-ed to the flag values.
*/
#define MS_MGC_VAL 0xC0ED0000 /* magic flag number to indicate "new" flags */
#define MS_MGC_MSK 0xffff0000 /* magic flag number mask */
/*
* Note that nosuid 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 override it selectively if you really wanted to with some
* ioctl() that is not currently implemented.
*
* Exception: MS_RDONLY is always applied to the entire file system.
*
* Unfortunately, it is possible to change a filesystems flags with it mounted
* with files in use. This means that all of the inodes will not have their
* i_flags updated. Hence, i_flags no longer inherit the superblock mount
* flags, so these have to be checked separately. -- rmk@arm.uk.linux.org
*/
#define __IS_FLG(inode,flg) (((inode)->i_sb && (inode)->i_sb->s_flags & (flg)) \
|| (inode)->i_flags & (flg))
#define IS_RDONLY(inode) (((inode)->i_sb) && ((inode)->i_sb->s_flags & MS_RDONLY))
#define IS_NOSUID(inode) __IS_FLG(inode, MS_NOSUID)
#define IS_NODEV(inode) __IS_FLG(inode, MS_NODEV)
#define IS_NOEXEC(inode) __IS_FLG(inode, MS_NOEXEC)
#define IS_SYNC(inode) __IS_FLG(inode, MS_SYNCHRONOUS)
#define IS_MANDLOCK(inode) __IS_FLG(inode, MS_MANDLOCK)
#define IS_QUOTAINIT(inode) ((inode)->i_flags & S_QUOTA)
#define IS_APPEND(inode) ((inode)->i_flags & S_APPEND)
#define IS_IMMUTABLE(inode) ((inode)->i_flags & S_IMMUTABLE)
#define IS_NOATIME(inode) __IS_FLG(inode, MS_NOATIME)
#define IS_NODIRATIME(inode) __IS_FLG(inode, MS_NODIRATIME)
/* 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 _IO(0x12,93) /* set device read-only (0 = read-write) */
#define BLKROGET _IO(0x12,94) /* get read-only status (0 = read_write) */
#define BLKRRPART _IO(0x12,95) /* re-read partition table */
#define BLKGETSIZE _IO(0x12,96) /* return device size */
#define BLKFLSBUF _IO(0x12,97) /* flush buffer cache */
#define BLKRASET _IO(0x12,98) /* Set read ahead for block device */
#define BLKRAGET _IO(0x12,99) /* get current read ahead setting */
#define BLKFRASET _IO(0x12,100)/* set filesystem (mm/filemap.c) read-ahead */
#define BLKFRAGET _IO(0x12,101)/* get filesystem (mm/filemap.c) read-ahead */
#define BLKSECTSET _IO(0x12,102)/* set max sectors per request (ll_rw_blk.c) */
#define BLKSECTGET _IO(0x12,103)/* get max sectors per request (ll_rw_blk.c) */
#define BLKSSZGET _IO(0x12,104)/* get block device sector size */
#if 0
#define BLKPG _IO(0x12,105)/* See blkpg.h */
/* This was here just to show that the number is taken -
probably all these _IO(0x12,*) ioctls should be moved to blkpg.h. */
#endif
#define BMAP_IOCTL 1 /* obsolete - kept for compatibility */
#define FIBMAP _IO(0x00,1) /* bmap access */
#define FIGETBSZ _IO(0x00,2) /* get the block size used for bmap */
struct fown_struct {
int pid; /* pid or -pgrp where SIGIO should be sent */
uid_t uid, euid; /* uid/euid of process setting the owner */
int signum; /* posix.1b rt signal to be delivered on IO */
};
struct file {
void * f_list;
struct dentry *f_dentry;
struct file_operations *f_op;
atomic_t f_count;
unsigned int f_flags;
mode_t f_mode;
loff_t f_pos;
unsigned long f_reada, f_ramax, f_raend, f_ralen, f_rawin;
struct fown_struct f_owner;
unsigned int f_uid, f_gid;
int f_error;
unsigned long f_version;
/* needed for tty driver, and maybe others */
void *private_data;
};
struct inode {
#ifdef TARGET_OS2
kdev_t i_rdev;
struct semaphore i_sem;
#else
void * i_hash;
void * i_list;
void * i_dentry;
unsigned long i_ino;
unsigned int i_count;
kdev_t i_dev;
umode_t i_mode;
nlink_t i_nlink;
uid_t i_uid;
gid_t i_gid;
kdev_t i_rdev;
loff_t i_size;
time_t i_atime;
time_t i_mtime;
time_t i_ctime;
unsigned long i_blksize;
unsigned long i_blocks;
unsigned long i_version;
struct semaphore i_sem;
struct inode_operations *i_op;
struct super_block *i_sb;
struct file_lock *i_flock;
struct vm_area_struct *i_mmap;
struct pipe_inode_info *i_pipe;
unsigned long i_state;
unsigned int i_flags;
unsigned char i_sock;
atomic_t i_writecount;
unsigned int i_attr_flags;
__u32 i_generation;
union {
void *generic_ip;
} u;
#endif
};
typedef int (*filldir_t)(void *, const char *, int, off_t, ino_t);
struct file_operations {
loff_t (*llseek) (struct file *, loff_t, int);
int (*read) (struct file *, char *, size_t, loff_t *);
int (*write) (struct file *, const char *, size_t, loff_t *);
int (*readdir) (struct file *, void *, filldir_t);
unsigned int (*poll) (struct file *, struct poll_table_struct *);
int (*ioctl) (struct inode *, struct file *, unsigned int, unsigned long);
int (*mmap) (struct file *, struct vm_area_struct *);
int (*open) (struct inode *, struct file *);
int (*flush) (struct file *);
int (*release) (struct inode *, struct file *);
int (*fsync) (struct file *, struct dentry *);
int (*fasync) (int, struct file *, int);
int (*check_media_change) (kdev_t dev);
int (*revalidate) (kdev_t dev);
int (*lock) (struct file *, int, struct file_lock *);
};
/* Inode state bits.. */
#define I_DIRTY 1
#define I_LOCK 2
#define I_FREEING 4
#include <linux/poll.h>
#endif /* _LINUX_FS_H */