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#ifndef _LINUX_FS_H

#define _LINUX_FS_H

/*

 * This file has definitions for some important file table

 * structures etc.

 */

#include <linux/config.h>

#include <linux/linkage.h>

#include <linux/limits.h>

#include <linux/wait.h>

#include <linux/types.h>

#include <linux/vfs.h>

#include <linux/net.h>

#include <linux/kdev_t.h>

#include <linux/ioctl.h>

/*

 * It's silly to have NR_OPEN bigger than NR_FILE, but I'll fix

 * that later. Anyway, now the file code is no longer dependent

 * on bitmaps in unsigned longs, but uses the new fd_set structure..

 *

 * Some programs (notably those using select()) may have to be

 * recompiled to take full advantage of the new limits..

 */

/* Fixed constants first: */

#undef NR_OPEN

#ifdef CONFIG_REDUCED_MEMORY

/* Originally 256: 116 would be neat because a files_struct becomes exactly 500 bytes,

   a relatively cool figure for kmalloc, but problems reducing fd_select made this not worth it.

   Currently 128. */

#define NR_OPEN 128 /*256*/

#define NR_SUPER 8 /*64*/

#else /* !CONFIG_REDUCED_MEMORY */

#define NR_OPEN 256

#define NR_SUPER 64

#endif /* !CONFIG_REDUCED_MEMORY */

#define BLOCK_SIZE 1024

#define BLOCK_SIZE_BITS 10

/* And dynamically-tunable limits and defaults: */

extern int max_inodes, nr_inodes;

extern int max_files, nr_files;

#ifdef CONFIG_REDUCED_MEMORY

#define NR_INODE 200/*64*/ /*3072*/

#define NR_FILE 128/*116*/ /*1024*/

#else /* !CONFIG_REDUCED_MEMORY */

#define NR_INODE 3072   /* this should be bigger than NR_FILE */

#define NR_FILE 1024    /* this can well be larger on a larger system */

#endif /* !CONFIG_REDUCED_MEMORY */

#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 WRITEA 3        /* write-ahead - don't block if no resources */

#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_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_WRITE         128     /* Write on 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 S_BAD_INODE     2048    /* Marker for unreadable inodes */

#define S_ZERO_WR       4096    /* Device accepts 0 length writes */

/*

 * 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)

/*

 * 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 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 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.

 */

#define IS_RDONLY(inode) (((inode)->i_sb) && ((inode)->i_sb->s_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_SYNCHRONOUS)

#define IS_MANDLOCK(inode) ((inode)->i_flags & MS_MANDLOCK)

#define IS_WRITABLE(inode) ((inode)->i_flags & S_WRITE)

#define IS_APPEND(inode) ((inode)->i_flags & S_APPEND)

#define IS_IMMUTABLE(inode) ((inode)->i_flags & S_IMMUTABLE)

#define IS_NOATIME(inode) ((inode)->i_flags & MS_NOATIME)

#define        IS_ZERO_WR(inode) ((inode)->i_flags & S_ZERO_WR)

#define UPDATE_ATIME(inode) \

        if (!IS_NOATIME(inode) && !IS_RDONLY(inode)) { \

                inode->i_atime = CURRENT_TIME; \

                inode->i_dirt = 1; \

        }

/* 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 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 */

#ifdef __KERNEL__

#include <asm/semaphore.h>

#include <asm/bitops.h>

extern void buffer_init(void);

extern unsigned long inode_init(unsigned long start, unsigned long end);

extern unsigned long file_table_init(unsigned long start, unsigned long end);

extern unsigned long name_cache_init(unsigned long start, unsigned long end);

typedef char buffer_block[BLOCK_SIZE];

/* bh state bits */

#define BH_Uptodate             0        /* 1 if the buffer contains valid data */

#define BH_Dirty                1       /* 1 if the buffer is dirty */

#define BH_Lock                 2       /* 1 if the buffer is locked */

#define BH_Req                  3       /* 0 if the buffer has been invalidated */

#define BH_Touched              4       /* 1 if the buffer has been touched (aging) */

#define BH_Has_aged             5       /* 1 if the buffer has been aged (aging) */

#define BH_Protected            6       /* 1 if the buffer is protected */

#define BH_FreeOnIO             7       /* 1 to discard the buffer_head after IO */

#define BH_MD                   8       /* 1 if the buffer is an MD request */

/*

 * Try to keep the most commonly used fields in single cache lines (16

 * bytes) to improve performance.  This ordering should be

 * particularly beneficial on 32-bit processors.

 *

 * We use the first 16 bytes for the data which is used in searches

 * over the block hash lists (ie. getblk(), find_buffer() and

 * friends).

 *

 * The second 16 bytes we use for lru buffer scans, as used by

 * sync_buffers() and refill_freelist().  -- sct

 */

struct buffer_head {

        /* First cache line: */

        unsigned long b_blocknr;        /* block number */

        kdev_t b_dev;                   /* device (B_FREE = free) */

        kdev_t b_rdev;                  /* Real device */

        unsigned long b_rsector;        /* Real buffer location on disk */

        struct buffer_head * b_next;    /* Hash queue list */

        struct buffer_head * b_this_page;       /* circular list of buffers in one page */

        /* Second cache line: */

        unsigned long b_state;          /* buffer state bitmap (see above) */

        struct buffer_head * b_next_free;

        unsigned int b_count;           /* users using this block */

        unsigned long b_size;           /* block size */

        /* Non-performance-critical data follows. */

        char * b_data;                  /* pointer to data block (1024 bytes) */

        unsigned int b_list;            /* List that this buffer appears */

        unsigned long b_flushtime;      /* Time when this (dirty) buffer

                                         * should be written */

        unsigned long b_lru_time;       /* Time when this buffer was

                                         * last used. */

        struct wait_queue * b_wait;

        struct buffer_head * b_prev;            /* doubly linked list of hash-queue */

        struct buffer_head * b_prev_free;       /* doubly linked list of buffers */

        struct buffer_head * b_reqnext;         /* request queue */

/*

 * Some MD stuff like RAID5 needs special event handlers and

 * special private buffer_head fields:

 */

        void * personality;

        void * private_bh;

};

static inline int buffer_uptodate(struct buffer_head * bh)

{

        return test_bit(BH_Uptodate, &bh->b_state);

}

static inline int buffer_dirty(struct buffer_head * bh)

{

        return test_bit(BH_Dirty, &bh->b_state);

}

static inline int buffer_locked(struct buffer_head * bh)

{

        return test_bit(BH_Lock, &bh->b_state);

}

static inline int buffer_req(struct buffer_head * bh)

{

        return test_bit(BH_Req, &bh->b_state);

}

static inline int buffer_touched(struct buffer_head * bh)

{

        return test_bit(BH_Touched, &bh->b_state);

}

static inline int buffer_has_aged(struct buffer_head * bh)

{

        return test_bit(BH_Has_aged, &bh->b_state);

}

static inline int buffer_protected(struct buffer_head * bh)

{

        return test_bit(BH_Protected, &bh->b_state);

}

#include <linux/pipe_fs_i.h>

#include <linux/minix_fs_i.h>

#include <linux/ext_fs_i.h>

#include <linux/ext2_fs_i.h>

#include <linux/hpfs_fs_i.h>

#include <linux/msdos_fs_i.h>

#include <linux/umsdos_fs_i.h>

#include <linux/iso_fs_i.h>

#include <linux/nfs_fs_i.h>

#include <linux/xia_fs_i.h>

#include <linux/sysv_fs_i.h>

#include <linux/affs_fs_i.h>

#include <linux/ufs_fs_i.h>

#include <linux/romfs_fs_i.h>

/*

 * Attribute flags.  These should be or-ed together to figure out what

 * has been changed!

 */

#define ATTR_MODE       1

#define ATTR_UID        2

#define ATTR_GID        4

#define ATTR_SIZE       8

#define ATTR_ATIME      16

#define ATTR_MTIME      32

#define ATTR_CTIME      64

#define ATTR_ATIME_SET  128

#define ATTR_MTIME_SET  256

#define ATTR_FORCE      512     /* Not a change, but a change it */

/*

 * This is the Inode Attributes structure, used for notify_change().  It

 * uses the above definitions as flags, to know which values have changed.

 * Also, in this manner, a Filesystem can look at only the values it cares

 * about.  Basically, these are the attributes that the VFS layer can

 * request to change from the FS layer.

 *

 * Derek Atkins <warlord@MIT.EDU> 94-10-20

 */

struct iattr {

        unsigned int    ia_valid;

        umode_t         ia_mode;

        uid_t           ia_uid;

        gid_t           ia_gid;

        off_t           ia_size;

        time_t          ia_atime;

        time_t          ia_mtime;

        time_t          ia_ctime;

};

#include <linux/quota.h>

struct vm_area_struct;

struct inode {

        kdev_t          i_dev;

        unsigned long   i_ino;

        umode_t         i_mode;

        nlink_t         i_nlink;

        uid_t           i_uid;

        gid_t           i_gid;

        kdev_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;

        unsigned long   i_version;

        unsigned long   i_nrpages;

        struct semaphore i_sem;

        struct inode_operations *i_op;

        struct super_block *i_sb;

        struct wait_queue *i_wait;

        struct file_lock *i_flock;

#ifndef NO_MM

        struct vm_area_struct *i_mmap;

#endif /* !NO_MM */

        struct page *i_pages;

        struct dquot *i_dquot[MAXQUOTAS];

        struct inode *i_next, *i_prev;

        struct inode *i_hash_next, *i_hash_prev;

        struct inode *i_bound_to, *i_bound_by;

        struct inode *i_mount;

        unsigned long i_count;  /* needs to be > (address_space * tasks)>>pagebits */

        unsigned short i_flags;

        unsigned short i_writecount;

        unsigned char i_lock;

        unsigned char i_dirt;

        unsigned char i_pipe;

        unsigned char i_sock;

        unsigned char i_seek;

        unsigned char i_update;

        unsigned char i_condemned;

        union {

                struct pipe_inode_info pipe_i;

                struct minix_inode_info minix_i;

                struct ext_inode_info ext_i;

                struct ext2_inode_info ext2_i;

                struct hpfs_inode_info hpfs_i;

                struct msdos_inode_info msdos_i;

                struct umsdos_inode_info umsdos_i;

                struct iso_inode_info isofs_i;

                struct nfs_inode_info nfs_i;

                struct xiafs_inode_info xiafs_i;

                struct sysv_inode_info sysv_i;

                struct affs_inode_info affs_i;

                struct ufs_inode_info ufs_i;

                struct romfs_inode_info romfs_i;

                struct socket socket_i;

                void * generic_ip;

        } u;

};

struct fown_struct {

        int pid;                /* pid or -pgrp where SIGIO should be sent */

        uid_t uid, euid;        /* uid/euid of process setting the owner */

};

struct file {

        mode_t f_mode;

        loff_t f_pos;

        unsigned short f_flags;

        unsigned short f_count;

        unsigned long f_reada, f_ramax, f_raend, f_ralen, f_rawin;

        struct file *f_next, *f_prev;

        struct fown_struct f_owner;

        struct inode * f_inode;

        struct file_operations * f_op;

        unsigned long f_version;

        void *private_data;     /* needed for tty driver, and maybe others */

};

#define FL_POSIX        1

#define FL_FLOCK        2

#define FL_BROKEN       4       /* broken flock() emulation */

#define FL_ACCESS       8       /* for processes suspended by mandatory locking */

struct file_lock {

        struct file_lock *fl_next;      /* singly linked list for this inode  */

        struct file_lock *fl_nextlink;  /* doubly linked list of all locks */

        struct file_lock *fl_prevlink;  /* used to simplify lock removal */

        struct file_lock *fl_nextblock; /* circular list of blocked processes */

        struct file_lock *fl_prevblock;

        struct task_struct *fl_owner;

        struct wait_queue *fl_wait;

        struct file *fl_file;

        unsigned char fl_flags;

        unsigned char fl_type;

        off_t fl_start;

        off_t fl_end;

};

#include <linux/fcntl.h>

extern int fcntl_getlk(unsigned int fd, struct flock *l);

extern int fcntl_setlk(unsigned int fd, unsigned int cmd, struct flock *l);

extern void locks_remove_locks(struct task_struct *task, struct file *filp);

#include <linux/stat.h>

#define FLOCK_VERIFY_READ  1

#define FLOCK_VERIFY_WRITE 2

extern int locks_mandatory_locked(struct inode *inode);

extern int locks_mandatory_area(int read_write, struct inode *inode,

                                struct file *filp, unsigned int offset,

                                unsigned int count);

extern inline int locks_verify_locked(struct inode *inode)

{

        /* Candidates for mandatory locking have the setgid bit set

         * but no group execute bit -  an otherwise meaningless combination.

         */

        if (IS_MANDLOCK(inode) &&

            (inode->i_mode & (S_ISGID | S_IXGRP)) == S_ISGID)

                return (locks_mandatory_locked(inode));

        return (0);

}

extern inline int locks_verify_area(int read_write, struct inode *inode,

                                    struct file *filp, unsigned int offset,

                                    unsigned int count)

{

        /* Candidates for mandatory locking have the setgid bit set

         * but no group execute bit -  an otherwise meaningless combination.

         */

        if (IS_MANDLOCK(inode) &&

            (inode->i_mode & (S_ISGID | S_IXGRP)) == S_ISGID)

                return (locks_mandatory_area(read_write, inode, filp, offset,

                                             count));

        return (0);

}

struct fasync_struct {

        int    magic;

        struct fasync_struct    *fa_next; /* singly linked list */

        struct file             *fa_file;

};

#define FASYNC_MAGIC 0x4601

extern int fasync_helper(struct inode *, struct file *, int, struct fasync_struct **);

#include <linux/minix_fs_sb.h>

#include <linux/ext_fs_sb.h>

#include <linux/ext2_fs_sb.h>

#include <linux/hpfs_fs_sb.h>

#include <linux/msdos_fs_sb.h>

#include <linux/iso_fs_sb.h>

#include <linux/nfs_fs_sb.h>

#include <linux/xia_fs_sb.h>

#include <linux/sysv_fs_sb.h>

#include <linux/affs_fs_sb.h>

#include <linux/ufs_fs_sb.h>

#include <linux/romfs_fs_sb.h>

struct super_block {

        kdev_t s_dev;

        unsigned long s_blocksize;

        unsigned char s_blocksize_bits;

        unsigned char s_lock;

        unsigned char s_rd_only;

        unsigned char s_dirt;

        struct file_system_type *s_type;

        struct super_operations *s_op;

        struct dquot_operations *dq_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 ext2_sb_info ext2_sb;

                struct hpfs_sb_info hpfs_sb;

                struct msdos_sb_info msdos_sb;

                struct isofs_sb_info isofs_sb;

                struct nfs_sb_info nfs_sb;

                struct xiafs_sb_info xiafs_sb;

                struct sysv_sb_info sysv_sb;

                struct affs_sb_info affs_sb;

                struct ufs_sb_info ufs_sb;

                struct romfs_sb_info romfs_sb;

                void *generic_sbp;

        } u;

};

/*

 * This is the "filldir" function type, used by readdir() to let

 * the kernel specify what kind of dirent layout it wants to have.

 * This allows the kernel to read directories into kernel space or

 * to have different dirent layouts depending on the binary type.

 */

typedef int (*filldir_t)(void *, const char *, int, off_t, ino_t);

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 *, const char *, int);

        int (*readdir) (struct inode *, struct file *, void *, filldir_t);

        int (*select) (struct inode *, struct file *, int, select_table *);

        int (*ioctl) (struct inode *, struct file *, unsigned int, unsigned long);

        int (*mmap) (struct inode *, struct file *, struct vm_area_struct *);

        int (*open) (struct inode *, struct file *);

        void (*release) (struct inode *, struct file *);

        int (*fsync) (struct inode *, struct file *);

        int (*fasync) (struct inode *, struct file *, int);

        int (*check_media_change) (kdev_t dev);

        int (*revalidate) (kdev_t dev);

#ifdef MAGIC_ROM_PTR

        int (*romptr) (struct inode *, struct file *, struct vm_area_struct *);

#endif /* MAGIC_ROM_PTR */

};

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);

        int (*readlink) (struct inode *,char *,int);

        int (*follow_link) (struct inode *,struct inode *,int,int,struct inode **);

        int (*readpage) (struct inode *, struct page *);

        int (*writepage) (struct inode *, struct page *);

        int (*bmap) (struct inode *,int);

        void (*truncate) (struct inode *);

        int (*permission) (struct inode *, int);

        int (*smap) (struct inode *,int);

};

struct super_operations {

        void (*read_inode) (struct inode *);

        int (*notify_change) (struct inode *, struct iattr *);

        void (*write_inode) (struct inode *);

        void (*put_inode) (struct inode *);

        void (*put_super) (struct super_block *);

        void (*write_super) (struct super_block *);

        void (*statfs) (struct super_block *, struct statfs *, int);

        int (*remount_fs) (struct super_block *, int *, char *);

};

struct dquot_operations {

        void (*initialize) (struct inode *, short);

        void (*drop) (struct inode *);

        int (*alloc_block) (const struct inode *, unsigned long);

        int (*alloc_inode) (const struct inode *, unsigned long);

        void (*free_block) (const struct inode *, unsigned long);

        void (*free_inode) (const struct inode *, unsigned long);

        int (*transfer) (struct inode *, struct iattr *, char);

};

struct file_system_type {

        struct super_block *(*read_super) (struct super_block *, void *, int);

        const char *name;

        int requires_dev;

        struct file_system_type * next;

};

extern int register_filesystem(struct file_system_type *);

extern int unregister_filesystem(struct file_system_type *);

asmlinkage int sys_open(const char *, int, int);

asmlinkage int sys_close(unsigned int);         /* yes, it's really unsigned */

asmlinkage int sys_read(unsigned int, char *, int);

extern void kill_fasync(struct fasync_struct *fa, int sig);

extern int getname(const char * filename, char **result);

extern void putname(char * name);

extern int do_truncate(struct inode *, unsigned long);

extern int register_blkdev(unsigned int, const char *, struct file_operations *);

extern int unregister_blkdev(unsigned int major, const char * name);

extern int blkdev_open(struct inode * inode, struct file * filp);

extern void blkdev_release (struct inode * inode);

extern struct file_operations def_blk_fops;

extern struct inode_operations blkdev_inode_operations;

extern int register_chrdev(unsigned int, const char *, struct file_operations *);

extern int unregister_chrdev(unsigned int major, const char * name);

extern int chrdev_open(struct inode * inode, struct file * filp);

extern struct file_operations def_chr_fops;

extern struct inode_operations chrdev_inode_operations;

extern void init_fifo(struct inode * inode);

extern struct inode_operations fifo_inode_operations;

extern struct file_operations connecting_fifo_fops;

extern struct file_operations read_fifo_fops;

extern struct file_operations write_fifo_fops;

extern struct file_operations rdwr_fifo_fops;

extern struct file_operations read_pipe_fops;

extern struct file_operations write_pipe_fops;

extern struct file_operations rdwr_pipe_fops;

extern struct file_system_type *get_fs_type(const char *name);

extern int fs_may_mount(kdev_t dev);

extern int fs_may_umount(kdev_t dev, struct inode * mount_root);

extern int fs_may_remount_ro(kdev_t dev);

extern struct file *first_file;

extern struct super_block super_blocks[NR_SUPER];

extern void refile_buffer(struct buffer_head * buf);

extern void set_writetime(struct buffer_head * buf, int flag);

extern int try_to_free_buffer(struct buffer_head*, struct buffer_head**, int);

extern int nr_buffers;

extern int buffermem;

extern int nr_buffer_heads;

#define BUF_CLEAN       0

#define BUF_LOCKED      1       /* Buffers scheduled for write */

#define BUF_LOCKED1     2       /* Supers, inodes */

#define BUF_DIRTY       3       /* Dirty buffers, not yet scheduled for write */

#define NR_LIST         4

void mark_buffer_uptodate(struct buffer_head * bh, int on);

extern inline void mark_buffer_clean(struct buffer_head * bh)

{

        if (clear_bit(BH_Dirty, &bh->b_state)) {

                if (bh->b_list == BUF_DIRTY)

                        refile_buffer(bh);

        }

}

extern inline void mark_buffer_dirty(struct buffer_head * bh, int flag)

{

        if (!set_bit(BH_Dirty, &bh->b_state)) {

                set_writetime(bh, flag);

                if (bh->b_list != BUF_DIRTY)

                        refile_buffer(bh);

        }

}

extern int check_disk_change(kdev_t dev);

extern void invalidate_inodes(kdev_t dev);

extern void invalidate_inode_pages(struct inode *);

extern void invalidate_buffers(kdev_t dev);

extern void invalidate_buffers_by_block(kdev_t dev, unsigned int start, unsigned int count);

extern void invalidate_buffers_by_byte(kdev_t dev, unsigned long pos, unsigned long len);