imported original firmware WRT54GL_v4.30.11_11_US

1 files changed, 1630 insertions, 0 deletions

diff --git a/release/src/linux/linux/include/linux/fs.h b/release/src/linux/linux/include/linux/fs.h
new file mode 100644
index 00000000..0b85bf9e
--- /dev/null
+++ b/release/src/linux/linux/include/linux/fs.h
@@ -0,0 +1,1630 @@
+#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>
+#include <linux/list.h>
+#include <linux/dcache.h>
+#include <linux/stat.h>
+#include <linux/cache.h>
+#include <linux/stddef.h>
+#include <linux/string.h>
+
+#include <asm/atomic.h>
+#include <asm/bitops.h>
+
+struct poll_table_struct;
+
+
+/*
+ * 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..  
+ */
+
+/* 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)
+
+/* And dynamically-tunable limits and defaults: */
+struct files_stat_struct {
+	int nr_files;		/* read only */
+	int nr_free_files;	/* read only */
+	int max_files;		/* tunable */
+};
+extern struct files_stat_struct files_stat;
+
+struct inodes_stat_t {
+	int nr_inodes;
+	int nr_unused;
+	int dummy[5];
+};
+extern struct inodes_stat_t inodes_stat;
+
+extern int leases_enable, dir_notify_enable, lease_break_time;
+
+#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 SPECIAL 4	/* For non-blockdevice requests in request queue */
+
+#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_SINGLE	8 /* Filesystem that can have only one superblock */
+#define FS_NOMOUNT	16 /* Never mount from userland */
+#define FS_LITTER	32 /* Keeps the tree in dcache */
+#define FS_ODD_RENAME	32768	/* Temporary stuff; will go away as soon
+				  * as nfs_rename() will be cleaned up
+				  */
+/*
+ * These are the fs-independent mount-flags: up to 32 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 MS_NOATIME	1024	/* Do not update access times. */
+#define MS_NODIRATIME	2048	/* Do not update directory access times */
+#define MS_BIND		4096
+#define MS_MOVE		8192
+#define MS_REC		16384
+#define MS_VERBOSE	32768
+#define MS_ACTIVE	(1<<30)
+#define MS_NOUSER	(1<<31)
+
+/*
+ * Superblock flags that can be altered by MS_REMOUNT
+ */
+#define MS_RMT_MASK	(MS_RDONLY|MS_SYNCHRONOUS|MS_MANDLOCK|MS_NOATIME|\
+			 MS_NODIRATIME)
+
+/*
+ * Old magic mount flag and mask
+ */
+#define MS_MGC_VAL 0xC0ED0000
+#define MS_MGC_MSK 0xffff0000
+
+/* Inode flags - they have nothing to superblock flags now */
+
+#define S_SYNC		1	/* Writes are synced at once */
+#define S_NOATIME	2	/* Do not update access times */
+#define S_QUOTA		4	/* Quota initialized for file */
+#define S_APPEND	8	/* Append-only file */
+#define S_IMMUTABLE	16	/* Immutable file */
+#define S_DEAD		32	/* removed, but still open directory */
+#define S_NOQUOTA	64	/* Inode is not counted to quota */
+
+/*
+ * 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->s_flags & (flg))
+
+#define IS_RDONLY(inode) ((inode)->i_sb->s_flags & MS_RDONLY)
+#define IS_SYNC(inode)		(__IS_FLG(inode, MS_SYNCHRONOUS) || ((inode)->i_flags & S_SYNC))
+#define IS_MANDLOCK(inode)	__IS_FLG(inode, MS_MANDLOCK)
+
+#define IS_QUOTAINIT(inode)	((inode)->i_flags & S_QUOTA)
+#define IS_NOQUOTA(inode)	((inode)->i_flags & S_NOQUOTA)
+#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) || ((inode)->i_flags & S_NOATIME))
+#define IS_NODIRATIME(inode)	__IS_FLG(inode, MS_NODIRATIME)
+
+#define IS_DEADDIR(inode)	((inode)->i_flags & S_DEAD)
+
+/* 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 /512 (long *arg) */
+#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 */
+/* A jump here: 108-111 have been used for various private purposes. */
+#define BLKBSZGET  _IOR(0x12,112,sizeof(int))
+#define BLKBSZSET  _IOW(0x12,113,sizeof(int))
+#define BLKGETSIZE64 _IOR(0x12,114,sizeof(u64))	/* return device size in bytes (u64 *arg) */
+
+#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/byteorder.h>
+
+extern void update_atime (struct inode *);
+#define UPDATE_ATIME(inode) update_atime (inode)
+
+extern void buffer_init(unsigned long);
+extern void inode_init(unsigned long);
+extern void mnt_init(unsigned long);
+extern void files_init(unsigned long mempages);
+
+/* bh state bits */
+enum bh_state_bits {
+	BH_Uptodate,	/* 1 if the buffer contains valid data */
+	BH_Dirty,	/* 1 if the buffer is dirty */
+	BH_Lock,	/* 1 if the buffer is locked */
+	BH_Req,		/* 0 if the buffer has been invalidated */
+	BH_Mapped,	/* 1 if the buffer has a disk mapping */
+	BH_New,		/* 1 if the buffer is new and not yet written out */
+	BH_Async,	/* 1 if the buffer is under end_buffer_io_async I/O */
+	BH_Wait_IO,	/* 1 if we should write out this buffer */
+	BH_Launder,	/* 1 if we can throttle on this buffer */
+	BH_JBD,		/* 1 if it has an attached journal_head */
+
+	BH_PrivateStart,/* not a state bit, but the first bit available
+			 * for private allocation by other entities
+			 */
+};
+
+#define MAX_BUF_PER_PAGE (PAGE_CACHE_SIZE / 512)
+
+/*
+ * 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() 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: */
+	struct buffer_head *b_next;	/* Hash queue list */
+	unsigned long b_blocknr;	/* block number */
+	unsigned short b_size;		/* block size */
+	unsigned short b_list;		/* List that this buffer appears */
+	kdev_t b_dev;			/* device (B_FREE = free) */
+
+	atomic_t b_count;		/* users using this block */
+	kdev_t b_rdev;			/* Real device */
+	unsigned long b_state;		/* buffer state bitmap (see above) */
+	unsigned long b_flushtime;	/* Time when (dirty) buffer should be written */
+
+	struct buffer_head *b_next_free;/* lru/free list linkage */
+	struct buffer_head *b_prev_free;/* doubly linked list of buffers */
+	struct buffer_head *b_this_page;/* circular list of buffers in one page */
+	struct buffer_head *b_reqnext;	/* request queue */
+
+	struct buffer_head **b_pprev;	/* doubly linked list of hash-queue */
+	char * b_data;			/* pointer to data block */
+	struct page *b_page;		/* the page this bh is mapped to */
+	void (*b_end_io)(struct buffer_head *bh, int uptodate); /* I/O completion */
+ 	void *b_private;		/* reserved for b_end_io */
+
+	unsigned long b_rsector;	/* Real buffer location on disk */
+	wait_queue_head_t b_wait;
+
+	struct inode *	     b_inode;
+	struct list_head     b_inode_buffers;	/* doubly linked list of inode dirty buffers */
+};
+
+typedef void (bh_end_io_t)(struct buffer_head *bh, int uptodate);
+void init_buffer(struct buffer_head *, bh_end_io_t *, void *);
+
+#define __buffer_state(bh, state)	(((bh)->b_state & (1UL << BH_##state)) != 0)
+
+#define buffer_uptodate(bh)	__buffer_state(bh,Uptodate)
+#define buffer_dirty(bh)	__buffer_state(bh,Dirty)
+#define buffer_locked(bh)	__buffer_state(bh,Lock)
+#define buffer_req(bh)		__buffer_state(bh,Req)
+#define buffer_mapped(bh)	__buffer_state(bh,Mapped)
+#define buffer_new(bh)		__buffer_state(bh,New)
+#define buffer_async(bh)	__buffer_state(bh,Async)
+#define buffer_launder(bh)	__buffer_state(bh,Launder)
+
+#define bh_offset(bh)		((unsigned long)(bh)->b_data & ~PAGE_MASK)
+
+extern void set_bh_page(struct buffer_head *bh, struct page *page, unsigned long offset);
+
+#define touch_buffer(bh)	mark_page_accessed(bh->b_page)
+
+
+#include <linux/pipe_fs_i.h>
+#include <linux/minix_fs_i.h>
+#include <linux/ext2_fs_i.h>
+#include <linux/ext3_fs_i.h>
+#include <linux/hpfs_fs_i.h>
+#include <linux/ntfs_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/sysv_fs_i.h>
+#include <linux/affs_fs_i.h>
+#include <linux/ufs_fs_i.h>
+#include <linux/efs_fs_i.h>
+#include <linux/coda_fs_i.h>
+#include <linux/romfs_fs_i.h>
+#include <linux/shmem_fs.h>
+#include <linux/smb_fs_i.h>
+#include <linux/hfs_fs_i.h>
+#include <linux/adfs_fs_i.h>
+#include <linux/qnx4_fs_i.h>
+#include <linux/reiserfs_fs_i.h>
+#include <linux/bfs_fs_i.h>
+#include <linux/udf_fs_i.h>
+#include <linux/ncp_fs_i.h>
+#include <linux/proc_fs_i.h>
+#include <linux/usbdev_fs_i.h>
+#include <linux/jffs2_fs_i.h>
+#include <linux/cramfs_fs_sb.h>
+#include <linux/squashfs_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 */
+#define ATTR_ATTR_FLAG	1024
+
+/*
+ * 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;
+	loff_t		ia_size;
+	time_t		ia_atime;
+	time_t		ia_mtime;
+	time_t		ia_ctime;
+	unsigned int	ia_attr_flags;
+};
+
+/*
+ * This is the inode attributes flag definitions
+ */
+#define ATTR_FLAG_SYNCRONOUS	1 	/* Syncronous write */
+#define ATTR_FLAG_NOATIME	2 	/* Don't update atime */
+#define ATTR_FLAG_APPEND	4 	/* Append-only file */
+#define ATTR_FLAG_IMMUTABLE	8 	/* Immutable file */
+#define ATTR_FLAG_NODIRATIME	16 	/* Don't update atime for directory */
+
+/*
+ * Includes for diskquotas and mount structures.
+ */
+#include <linux/quota.h>
+#include <linux/mount.h>
+
+/*
+ * oh the beauties of C type declarations.
+ */
+struct page;
+struct address_space;
+struct kiobuf;
+
+struct address_space_operations {
+	int (*writepage)(struct page *);
+	int (*readpage)(struct file *, struct page *);
+	int (*sync_page)(struct page *);
+	/*
+	 * ext3 requires that a successful prepare_write() call be followed
+	 * by a commit_write() call - they must be balanced
+	 */
+	int (*prepare_write)(struct file *, struct page *, unsigned, unsigned);
+	int (*commit_write)(struct file *, struct page *, unsigned, unsigned);
+	/* Unfortunately this kludge is needed for FIBMAP. Don't use it */
+	int (*bmap)(struct address_space *, long);
+	int (*flushpage) (struct page *, unsigned long);
+	int (*releasepage) (struct page *, int);
+#define KERNEL_HAS_O_DIRECT /* this is for modules out of the kernel */
+	int (*direct_IO)(int, struct inode *, struct kiobuf *, unsigned long, int);
+};
+
+struct address_space {
+	struct list_head	clean_pages;	/* list of clean pages */
+	struct list_head	dirty_pages;	/* list of dirty pages */
+	struct list_head	locked_pages;	/* list of locked pages */
+	unsigned long		nrpages;	/* number of total pages */
+	struct address_space_operations *a_ops;	/* methods */
+	struct inode		*host;		/* owner: inode, block_device */
+	struct vm_area_struct	*i_mmap;	/* list of private mappings */
+	struct vm_area_struct	*i_mmap_shared; /* list of shared mappings */
+	spinlock_t		i_shared_lock;  /* and spinlock protecting it */
+	int			gfp_mask;	/* how to allocate the pages */
+};
+
+struct char_device {
+	struct list_head	hash;
+	atomic_t		count;
+	dev_t			dev;
+	atomic_t		openers;
+	struct semaphore	sem;
+};
+
+struct block_device {
+	struct list_head	bd_hash;
+	atomic_t		bd_count;
+	struct inode *		bd_inode;
+	dev_t			bd_dev;  /* not a kdev_t - it's a search key */
+	int			bd_openers;
+	const struct block_device_operations *bd_op;
+	struct semaphore	bd_sem;	/* open/close mutex */
+	struct list_head	bd_inodes;
+};
+
+struct inode {
+	struct list_head	i_hash;
+	struct list_head	i_list;
+	struct list_head	i_dentry;
+	
+	struct list_head	i_dirty_buffers;
+	struct list_head	i_dirty_data_buffers;
+
+	unsigned long		i_ino;
+	atomic_t		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 int		i_blkbits;
+	unsigned long		i_blksize;
+	unsigned long		i_blocks;
+	unsigned long		i_version;
+	struct semaphore	i_sem;
+	struct semaphore	i_zombie;
+	struct inode_operations	*i_op;
+	struct file_operations	*i_fop;	/* former ->i_op->default_file_ops */
+	struct super_block	*i_sb;
+	wait_queue_head_t	i_wait;
+	struct file_lock	*i_flock;
+	struct address_space	*i_mapping;
+	struct address_space	i_data;
+	struct dquot		*i_dquot[MAXQUOTAS];
+	/* These three should probably be a union */
+	struct list_head	i_devices;
+	struct pipe_inode_info	*i_pipe;
+	struct block_device	*i_bdev;
+	struct char_device	*i_cdev;
+
+	unsigned long		i_dnotify_mask; /* Directory notify events */
+	struct dnotify_struct	*i_dnotify; /* for directory notifications */
+
+	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 {
+		struct minix_inode_info		minix_i;
+		struct ext2_inode_info		ext2_i;
+		struct ext3_inode_info		ext3_i;
+		struct hpfs_inode_info		hpfs_i;
+		struct ntfs_inode_info		ntfs_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 sysv_inode_info		sysv_i;
+		struct affs_inode_info		affs_i;
+		struct ufs_inode_info		ufs_i;
+		struct efs_inode_info		efs_i;
+		struct romfs_inode_info		romfs_i;
+		struct shmem_inode_info		shmem_i;
+		struct coda_inode_info		coda_i;
+		struct smb_inode_info		smbfs_i;
+		struct hfs_inode_info		hfs_i;
+		struct adfs_inode_info		adfs_i;
+		struct qnx4_inode_info		qnx4_i;
+		struct reiserfs_inode_info	reiserfs_i;
+		struct bfs_inode_info		bfs_i;
+		struct udf_inode_info		udf_i;
+		struct ncp_inode_info		ncpfs_i;
+		struct proc_inode_info		proc_i;
+		struct socket			socket_i;
+		struct usbdev_inode_info        usbdev_i;
+		struct jffs2_inode_info		jffs2_i;
+		struct squashfs_inode_info	squashfs_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 */
+	int signum;		/* posix.1b rt signal to be delivered on IO */
+};
+
+struct file {
+	struct list_head	f_list;
+	struct dentry		*f_dentry;
+	struct vfsmount         *f_vfsmnt;
+	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;
+
+	/* preallocated helper kiobuf to speedup O_DIRECT */
+	struct kiobuf		*f_iobuf;
+	long			f_iobuf_lock;
+};
+extern spinlock_t files_lock;
+#define file_list_lock() spin_lock(&files_lock);
+#define file_list_unlock() spin_unlock(&files_lock);
+
+#define get_file(x)	atomic_inc(&(x)->f_count)
+#define file_count(x)	atomic_read(&(x)->f_count)
+
+extern int init_private_file(struct file *, struct dentry *, int);
+
+#define	MAX_NON_LFS	((1UL<<31) - 1)
+
+/* Page cache limit. The filesystems should put that into their s_maxbytes 
+   limits, otherwise bad things can happen in VM. */ 
+#if BITS_PER_LONG==32
+#define MAX_LFS_FILESIZE	(((u64)PAGE_CACHE_SIZE << (BITS_PER_LONG-1))-1) 
+#elif BITS_PER_LONG==64
+#define MAX_LFS_FILESIZE 	0x7fffffffffffffff
+#endif
+
+#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 */
+#define FL_LOCKD	16	/* lock held by rpc.lockd */
+#define FL_LEASE	32	/* lease held on this file */
+
+/*
+ * The POSIX file lock owner is determined by
+ * the "struct files_struct" in the thread group
+ * (or NULL for no owner - BSD locks).
+ *
+ * Lockd stuffs a "host" pointer into this.
+ */
+typedef struct files_struct *fl_owner_t;
+
+struct file_lock {
+	struct file_lock *fl_next;	/* singly linked list for this inode  */
+	struct list_head fl_link;	/* doubly linked list of all locks */
+	struct list_head fl_block;	/* circular list of blocked processes */
+	fl_owner_t fl_owner;
+	unsigned int fl_pid;
+	wait_queue_head_t fl_wait;
+	struct file *fl_file;
+	unsigned char fl_flags;
+	unsigned char fl_type;
+	loff_t fl_start;
+	loff_t fl_end;
+
+	void (*fl_notify)(struct file_lock *);	/* unblock callback */
+	void (*fl_insert)(struct file_lock *);	/* lock insertion callback */
+	void (*fl_remove)(struct file_lock *);	/* lock removal callback */
+
+	struct fasync_struct *	fl_fasync; /* for lease break notifications */
+	unsigned long fl_break_time;	/* for nonblocking lease breaks */
+
+	union {
+		struct nfs_lock_info	nfs_fl;
+	} fl_u;
+};
+
+/* The following constant reflects the upper bound of the file/locking space */
+#ifndef OFFSET_MAX
+#define INT_LIMIT(x)	(~((x)1 << (sizeof(x)*8 - 1)))
+#define OFFSET_MAX	INT_LIMIT(loff_t)
+#define OFFT_OFFSET_MAX	INT_LIMIT(off_t)
+#endif
+
+extern struct list_head file_lock_list;
+
+#include <linux/fcntl.h>
+
+extern int fcntl_getlk(unsigned int, struct flock *);
+extern int fcntl_setlk(unsigned int, unsigned int, struct flock *);
+
+extern int fcntl_getlk64(unsigned int, struct flock64 *);
+extern int fcntl_setlk64(unsigned int, unsigned int, struct flock64 *);
+
+/* fs/locks.c */
+extern void locks_init_lock(struct file_lock *);
+extern void locks_copy_lock(struct file_lock *, struct file_lock *);
+extern void locks_remove_posix(struct file *, fl_owner_t);
+extern void locks_remove_flock(struct file *);
+extern struct file_lock *posix_test_lock(struct file *, struct file_lock *);
+extern int posix_lock_file(struct file *, struct file_lock *, unsigned int);
+extern void posix_block_lock(struct file_lock *, struct file_lock *);
+extern void posix_unblock_lock(struct file_lock *);
+extern int posix_locks_deadlock(struct file_lock *, struct file_lock *);
+extern int __get_lease(struct inode *inode, unsigned int flags);
+extern time_t lease_get_mtime(struct inode *);
+extern int lock_may_read(struct inode *, loff_t start, unsigned long count);
+extern int lock_may_write(struct inode *, loff_t start, unsigned long count);
+
+struct fasync_struct {
+	int	magic;
+	int	fa_fd;
+	struct	fasync_struct	*fa_next; /* singly linked list */
+	struct	file 		*fa_file;
+};
+
+#define FASYNC_MAGIC 0x4601
+
+/* SMP safe fasync helpers: */
+extern int fasync_helper(int, struct file *, int, struct fasync_struct **);
+/* can be called from interrupts */
+extern void kill_fasync(struct fasync_struct **, int, int);
+/* only for net: no internal synchronization */
+extern void __kill_fasync(struct fasync_struct *, int, int);
+
+struct nameidata {
+	struct dentry *dentry;
+	struct vfsmount *mnt;
+	struct qstr last;
+	unsigned int flags;
+	int last_type;
+};
+
+#define DQUOT_USR_ENABLED	0x01		/* User diskquotas enabled */
+#define DQUOT_GRP_ENABLED	0x02		/* Group diskquotas enabled */
+
+struct quota_mount_options
+{
+	unsigned int flags;			/* Flags for diskquotas on this device */
+	struct semaphore dqio_sem;		/* lock device while I/O in progress */
+	struct semaphore dqoff_sem;		/* serialize quota_off() and quota_on() on device */
+	struct file *files[MAXQUOTAS];		/* fp's to quotafiles */
+	time_t inode_expire[MAXQUOTAS];		/* expiretime for inode-quota */
+	time_t block_expire[MAXQUOTAS];		/* expiretime for block-quota */
+	char rsquash[MAXQUOTAS];		/* for quotas threat root as any other user */
+};
+
+/*
+ *	Umount options
+ */
+
+#define MNT_FORCE	0x00000001	/* Attempt to forcibily umount */
+#define MNT_DETACH	0x00000002	/* Just detach from the tree */
+
+#include <linux/minix_fs_sb.h>
+#include <linux/ext2_fs_sb.h>
+#include <linux/ext3_fs_sb.h>
+#include <linux/hpfs_fs_sb.h>
+#include <linux/ntfs_fs_sb.h>
+#include <linux/msdos_fs_sb.h>
+#include <linux/iso_fs_sb.h>
+#include <linux/nfs_fs_sb.h>
+#include <linux/sysv_fs_sb.h>
+#include <linux/affs_fs_sb.h>
+#include <linux/ufs_fs_sb.h>
+#include <linux/efs_fs_sb.h>
+#include <linux/romfs_fs_sb.h>
+#include <linux/smb_fs_sb.h>
+#include <linux/hfs_fs_sb.h>
+#include <linux/adfs_fs_sb.h>
+#include <linux/qnx4_fs_sb.h>
+#include <linux/reiserfs_fs_sb.h>
+#include <linux/bfs_fs_sb.h>
+#include <linux/udf_fs_sb.h>
+#include <linux/ncp_fs_sb.h>
+#include <linux/usbdev_fs_sb.h>
+#include <linux/cramfs_fs_sb.h>
+#include <linux/jffs2_fs_sb.h>
+#include <linux/squashfs_fs_sb.h>
+
+extern struct list_head super_blocks;
+extern spinlock_t sb_lock;
+
+#define sb_entry(list)	list_entry((list), struct super_block, s_list)
+#define S_BIAS (1<<30)
+struct super_block {
+	struct list_head	s_list;		/* Keep this first */
+	kdev_t			s_dev;
+	unsigned long		s_blocksize;
+	unsigned char		s_blocksize_bits;
+	unsigned char		s_dirt;
+	unsigned long long	s_maxbytes;	/* Max file size */
+	struct file_system_type	*s_type;
+	struct super_operations	*s_op;
+	struct dquot_operations	*dq_op;
+	unsigned long		s_flags;
+	unsigned long		s_magic;
+	struct dentry		*s_root;
+	struct rw_semaphore	s_umount;
+	struct semaphore	s_lock;
+	int			s_count;
+	atomic_t		s_active;
+
+	struct list_head	s_dirty;	/* dirty inodes */
+	struct list_head	s_locked_inodes;/* inodes being synced */
+	struct list_head	s_files;
+
+	struct block_device	*s_bdev;
+	struct list_head	s_instances;
+	struct quota_mount_options s_dquot;	/* Diskquota specific options */
+
+	union {
+		struct minix_sb_info	minix_sb;
+		struct ext2_sb_info	ext2_sb;
+		struct ext3_sb_info	ext3_sb;
+		struct hpfs_sb_info	hpfs_sb;
+		struct ntfs_sb_info	ntfs_sb;
+		struct msdos_sb_info	msdos_sb;
+		struct isofs_sb_info	isofs_sb;
+		struct nfs_sb_info	nfs_sb;
+		struct sysv_sb_info	sysv_sb;
+		struct affs_sb_info	affs_sb;
+		struct ufs_sb_info	ufs_sb;
+		struct efs_sb_info	efs_sb;
+		struct shmem_sb_info	shmem_sb;
+		struct romfs_sb_info	romfs_sb;
+		struct smb_sb_info	smbfs_sb;
+		struct hfs_sb_info	hfs_sb;
+		struct adfs_sb_info	adfs_sb;
+		struct qnx4_sb_info	qnx4_sb;
+		struct reiserfs_sb_info	reiserfs_sb;
+		struct bfs_sb_info	bfs_sb;
+		struct udf_sb_info	udf_sb;
+		struct ncp_sb_info	ncpfs_sb;
+		struct usbdev_sb_info   usbdevfs_sb;
+		struct jffs2_sb_info	jffs2_sb;
+		struct cramfs_sb_info	cramfs_sb;
+		struct squashfs_sb_info	squashfs_sb;
+		void			*generic_sbp;
+	} u;
+	/*
+	 * The next field is for VFS *only*. No filesystems have any business
+	 * even looking at it. You had been warned.
+	 */
+	struct semaphore s_vfs_rename_sem;	/* Kludge */
+
+	/* The next field is used by knfsd when converting a (inode number based)
+	 * file handle into a dentry. As it builds a path in the dcache tree from
+	 * the bottom up, there may for a time be a subpath of dentrys which is not
+	 * connected to the main tree.  This semaphore ensure that there is only ever
+	 * one such free path per filesystem.  Note that unconnected files (or other
+	 * non-directories) are allowed, but not unconnected diretories.
+	 */
+	struct semaphore s_nfsd_free_path_sem;
+};
+
+/*
+ * VFS helper functions..
+ */
+extern int vfs_create(struct inode *, struct dentry *, int);
+extern int vfs_mkdir(struct inode *, struct dentry *, int);
+extern int vfs_mknod(struct inode *, struct dentry *, int, dev_t);
+extern int vfs_symlink(struct inode *, struct dentry *, const char *);
+extern int vfs_link(struct dentry *, struct inode *, struct dentry *);
+extern int vfs_rmdir(struct inode *, struct dentry *);
+extern int vfs_unlink(struct inode *, struct dentry *);
+extern int vfs_rename(struct inode *, struct dentry *, struct inode *, struct dentry *);
+
+/*
+ * File types
+ */
+#define DT_UNKNOWN	0
+#define DT_FIFO		1
+#define DT_CHR		2
+#define DT_DIR		4
+#define DT_BLK		6
+#define DT_REG		8
+#define DT_LNK		10
+#define DT_SOCK		12
+#define DT_WHT		14
+
+/*
+ * 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, loff_t, ino_t, unsigned);
+
+struct block_device_operations {
+	int (*open) (struct inode *, struct file *);
+	int (*release) (struct inode *, struct file *);
+	int (*ioctl) (struct inode *, struct file *, unsigned, unsigned long);
+	int (*check_media_change) (kdev_t);
+	int (*revalidate) (kdev_t);
+	struct module *owner;
+};
+
+/*
+ * NOTE:
+ * read, write, poll, fsync, readv, writev can be called
+ *   without the big kernel lock held in all filesystems.
+ */
+struct file_operations {
+	struct module *owner;
+	loff_t (*llseek) (struct file *, loff_t, int);
+	ssize_t (*read) (struct file *, char *, size_t, loff_t *);
+	ssize_t (*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 datasync);
+	int (*fasync) (int, struct file *, int);
+	int (*lock) (struct file *, int, struct file_lock *);
+	ssize_t (*readv) (struct file *, const struct iovec *, unsigned long, loff_t *);
+	ssize_t (*writev) (struct file *, const struct iovec *, unsigned long, loff_t *);
+	ssize_t (*sendpage) (struct file *, struct page *, int, size_t, loff_t *, int);
+	unsigned long (*get_unmapped_area)(struct file *, unsigned long, unsigned long, unsigned long, unsigned long);
+};
+
+struct inode_operations {
+	int (*create) (struct inode *,struct dentry *,int);
+	struct dentry * (*lookup) (struct inode *,struct dentry *);
+	int (*link) (struct dentry *,struct inode *,struct dentry *);
+	int (*unlink) (struct inode *,struct dentry *);
+	int (*symlink) (struct inode *,struct dentry *,const char *);
+	int (*mkdir) (struct inode *,struct dentry *,int);
+	int (*rmdir) (struct inode *,struct dentry *);
+	int (*mknod) (struct inode *,struct dentry *,int,int);
+	int (*rename) (struct inode *, struct dentry *,
+			struct inode *, struct dentry *);
+	int (*readlink) (struct dentry *, char *,int);
+	int (*follow_link) (struct dentry *, struct nameidata *);
+	void (*truncate) (struct inode *);
+	int (*permission) (struct inode *, int);
+	int (*revalidate) (struct dentry *);
+	int (*setattr) (struct dentry *, struct iattr *);
+	int (*getattr) (struct dentry *, struct iattr *);
+	int (*setxattr) (struct dentry *, const char *, void *, size_t, int);
+	ssize_t (*getxattr) (struct dentry *, const char *, void *, size_t);
+	ssize_t (*listxattr) (struct dentry *, char *, size_t);
+	int (*removexattr) (struct dentry *, const char *);
+};
+
+struct seq_file;
+
+/*
+ * NOTE: write_inode, delete_inode, clear_inode, put_inode can be called
+ * without the big kernel lock held in all filesystems.
+ */
+struct super_operations {
+	void (*read_inode) (struct inode *);
+  
+  	/* reiserfs kludge.  reiserfs needs 64 bits of information to
+    	** find an inode.  We are using the read_inode2 call to get
+   	** that information.  We don't like this, and are waiting on some
+   	** VFS changes for the real solution.
+   	** iget4 calls read_inode2, iff it is defined
+   	*/
+    	void (*read_inode2) (struct inode *, void *) ;
+   	void (*dirty_inode) (struct inode *);
+	void (*write_inode) (struct inode *, int);
+	void (*put_inode) (struct inode *);
+	void (*delete_inode) (struct inode *);
+	void (*put_super) (struct super_block *);
+	void (*write_super) (struct super_block *);
+	void (*write_super_lockfs) (struct super_block *);
+	void (*unlockfs) (struct super_block *);
+	int (*statfs) (struct super_block *, struct statfs *);
+	int (*remount_fs) (struct super_block *, int *, char *);
+	void (*clear_inode) (struct inode *);
+	void (*umount_begin) (struct super_block *);
+
+	/* Following are for knfsd to interact with "interesting" filesystems
+	 * Currently just reiserfs, but possibly FAT and others later
+	 *
+	 * fh_to_dentry is given a filehandle fragement with length, and a type flag
+	 *   and must return a dentry for the referenced object or, if "parent" is
+	 *   set, a dentry for the parent of the object.
+	 *   If a dentry cannot be found, a "root" dentry should be created and
+	 *   flaged as DCACHE_NFSD_DISCONNECTED. nfsd_iget is an example implementation.
+	 *
+	 * dentry_to_fh is given a dentry and must generate the filesys specific
+	 *   part of the file handle.  Available length is passed in *lenp and used
+	 *   length should be returned therein.
+	 *   If need_parent is set, then dentry_to_fh should encode sufficient information
+	 *   to find the (current) parent.
+	 *   dentry_to_fh should return a 1byte "type" which will be passed back in
+	 *   the fhtype arguement to fh_to_dentry.  Type of 0 is reserved.
+	 *   If filesystem was exportable before the introduction of fh_to_dentry,
+	 *   types 1 and 2 should be used is that same way as the generic code.
+	 *   Type 255 means error.
+	 *
+	 * Lengths are in units of 4bytes, not bytes.
+	 */
+	struct dentry * (*fh_to_dentry)(struct super_block *sb, __u32 *fh, int len, int fhtype, int parent);
+	int (*dentry_to_fh)(struct dentry *, __u32 *fh, int *lenp, int need_parent);
+	int (*show_options)(struct seq_file *, struct vfsmount *);
+};
+
+/* Inode state bits.. */
+#define I_DIRTY_SYNC		1 /* Not dirty enough for O_DATASYNC */
+#define I_DIRTY_DATASYNC	2 /* Data-related inode changes pending */
+#define I_DIRTY_PAGES		4 /* Data-related inode changes pending */
+#define I_LOCK			8
+#define I_FREEING		16
+#define I_CLEAR			32
+
+#define I_DIRTY (I_DIRTY_SYNC | I_DIRTY_DATASYNC | I_DIRTY_PAGES)
+
+extern void __mark_inode_dirty(struct inode *, int);
+static inline void mark_inode_dirty(struct inode *inode)
+{
+	__mark_inode_dirty(inode, I_DIRTY);
+}
+
+static inline void mark_inode_dirty_sync(struct inode *inode)
+{
+	__mark_inode_dirty(inode, I_DIRTY_SYNC);
+}
+
+static inline void mark_inode_dirty_pages(struct inode *inode)
+{
+	__mark_inode_dirty(inode, I_DIRTY_PAGES);
+}
+
+struct dquot_operations {
+	void (*initialize) (struct inode *, short);
+	void (*drop) (struct inode *);
+	int (*alloc_block) (struct inode *, unsigned long, char);
+	int (*alloc_inode) (const struct inode *, unsigned long);
+	void (*free_block) (struct inode *, unsigned long);
+	void (*free_inode) (const struct inode *, unsigned long);
+	int (*transfer) (struct inode *, struct iattr *);
+};
+
+struct file_system_type {
+	const char *name;
+	int fs_flags;
+	struct super_block *(*read_super) (struct super_block *, void *, int);
+	struct module *owner;
+	struct file_system_type * next;
+	struct list_head fs_supers;
+};
+
+#define DECLARE_FSTYPE(var,type,read,flags) \
+struct file_system_type var = { \
+	name:		type, \
+	read_super:	read, \
+	fs_flags:	flags, \
+	owner:		THIS_MODULE, \
+}
+
+#define DECLARE_FSTYPE_DEV(var,type,read) \
+	DECLARE_FSTYPE(var,type,read,FS_REQUIRES_DEV)
+
+/* Alas, no aliases. Too much hassle with bringing module.h everywhere */
+#define fops_get(fops) \
+	(((fops) && (fops)->owner)	\
+		? ( try_inc_mod_count((fops)->owner) ? (fops) : NULL ) \
+		: (fops))
+
+#define fops_put(fops) \
+do {	\
+	if ((fops) && (fops)->owner) \
+		__MOD_DEC_USE_COUNT((fops)->owner);	\
+} while(0)
+
+extern int register_filesystem(struct file_system_type *);
+extern int unregister_filesystem(struct file_system_type *);
+extern struct vfsmount *kern_mount(struct file_system_type *);
+extern int may_umount(struct vfsmount *);
+extern long do_mount(char *, char *, char *, unsigned long, void *);
+
+#define kern_umount mntput
+
+extern int vfs_statfs(struct super_block *, struct statfs *);
+
+/* Return value for VFS lock functions - tells locks.c to lock conventionally
+ * REALLY kosha for root NFS and nfs_lock
+ */ 
+#define LOCK_USE_CLNT 1
+
+#define FLOCK_VERIFY_READ  1
+#define FLOCK_VERIFY_WRITE 2
+
+extern int locks_mandatory_locked(struct inode *);
+extern int locks_mandatory_area(int, struct inode *, struct file *, loff_t, size_t);
+
+/*
+ * Candidates for mandatory locking have the setgid bit set
+ * but no group execute bit -  an otherwise meaningless combination.
+ */
+#define MANDATORY_LOCK(inode) \
+	(IS_MANDLOCK(inode) && ((inode)->i_mode & (S_ISGID | S_IXGRP)) == S_ISGID)
+
+static inline int locks_verify_locked(struct inode *inode)
+{
+	if (MANDATORY_LOCK(inode))
+		return locks_mandatory_locked(inode);
+	return 0;
+}
+
+static inline int locks_verify_area(int read_write, struct inode *inode,
+				    struct file *filp, loff_t offset,
+				    size_t count)
+{
+	if (inode->i_flock && MANDATORY_LOCK(inode))
+		return locks_mandatory_area(read_write, inode, filp, offset, count);
+	return 0;
+}
+
+static inline int locks_verify_truncate(struct inode *inode,
+				    struct file *filp,
+				    loff_t size)
+{
+	if (inode->i_flock && MANDATORY_LOCK(inode))
+		return locks_mandatory_area(
+			FLOCK_VERIFY_WRITE, inode, filp,
+			size < inode->i_size ? size : inode->i_size,
+			(size < inode->i_size ? inode->i_size - size
+			 : size - inode->i_size)
+		);
+	return 0;
+}
+
+static inline int get_lease(struct inode *inode, unsigned int mode)
+{
+	if (inode->i_flock)
+		return __get_lease(inode, mode);
+	return 0;
+}
+
+/* fs/open.c */
+
+asmlinkage long sys_open(const char *, int, int);
+asmlinkage long sys_close(unsigned int);	/* yes, it's really unsigned */
+extern int do_truncate(struct dentry *, loff_t start);
+
+extern struct file *filp_open(const char *, int, int);
+extern struct file * dentry_open(struct dentry *, struct vfsmount *, int);
+extern int filp_close(struct file *, fl_owner_t id);
+extern char * getname(const char *);
+
+/* fs/dcache.c */
+extern void vfs_caches_init(unsigned long);
+
+#define __getname()	kmem_cache_alloc(names_cachep, SLAB_KERNEL)
+#define putname(name)	kmem_cache_free(names_cachep, (void *)(name))
+
+enum {BDEV_FILE, BDEV_SWAP, BDEV_FS, BDEV_RAW};
+extern int register_blkdev(unsigned int, const char *, struct block_device_operations *);
+extern int unregister_blkdev(unsigned int, const char *);
+extern struct block_device *bdget(dev_t);
+extern int bd_acquire(struct inode *inode);
+extern void bd_forget(struct inode *inode);
+extern void bdput(struct block_device *);
+extern struct char_device *cdget(dev_t);
+extern void cdput(struct char_device *);
+extern int blkdev_open(struct inode *, struct file *);
+extern int blkdev_close(struct inode *, struct file *);
+extern struct file_operations def_blk_fops;
+extern struct address_space_operations def_blk_aops;
+extern struct file_operations def_fifo_fops;
+extern int ioctl_by_bdev(struct block_device *, unsigned, unsigned long);
+extern int blkdev_get(struct block_device *, mode_t, unsigned, int);
+extern int blkdev_put(struct block_device *, int);
+
+/* fs/devices.c */
+extern const struct block_device_operations *get_blkfops(unsigned int);
+extern int register_chrdev(unsigned int, const char *, struct file_operations *);
+extern int unregister_chrdev(unsigned int, const char *);
+extern int chrdev_open(struct inode *, struct file *);
+extern const char * bdevname(kdev_t);
+extern const char * cdevname(kdev_t);
+extern const char * kdevname(kdev_t);
+extern void init_special_inode(struct inode *, umode_t, int);
+
+/* Invalid inode operations -- fs/bad_inode.c */
+extern void make_bad_inode(struct inode *);
+extern int is_bad_inode(struct inode *);
+
+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 int fs_may_remount_ro(struct super_block *);
+
+extern int FASTCALL(try_to_free_buffers(struct page *, unsigned int));
+extern void refile_buffer(struct buffer_head * buf);
+extern void create_empty_buffers(struct page *, kdev_t, unsigned long);
+extern void end_buffer_io_sync(struct buffer_head *bh, int uptodate);
+
+/* reiserfs_writepage needs this */
+extern void set_buffer_async_io(struct buffer_head *bh) ;
+
+#define BUF_CLEAN	0
+#define BUF_LOCKED	1	/* Buffers scheduled for write */
+#define BUF_DIRTY	2	/* Dirty buffers, not yet scheduled for write */
+#define NR_LIST		3
+
+static inline void get_bh(struct buffer_head * bh)
+{
+        atomic_inc(&(bh)->b_count);
+}
+
+static inline void put_bh(struct buffer_head *bh)
+{
+        smp_mb__before_atomic_dec();
+        atomic_dec(&bh->b_count);
+}
+
+/*
+ * This is called by bh->b_end_io() handlers when I/O has completed.
+ */
+static inline void mark_buffer_uptodate(struct buffer_head * bh, int on)
+{
+	if (on)
+		set_bit(BH_Uptodate, &bh->b_state);
+	else
+		clear_bit(BH_Uptodate, &bh->b_state);
+}
+
+#define atomic_set_buffer_clean(bh) test_and_clear_bit(BH_Dirty, &(bh)->b_state)
+
+static inline void __mark_buffer_clean(struct buffer_head *bh)
+{
+	refile_buffer(bh);
+}
+
+static inline void mark_buffer_clean(struct buffer_head * bh)
+{
+	if (atomic_set_buffer_clean(bh))
+		__mark_buffer_clean(bh);
+}
+
+extern void FASTCALL(__mark_dirty(struct buffer_head *bh));
+extern void FASTCALL(__mark_buffer_dirty(struct buffer_head *bh));
+extern void FASTCALL(mark_buffer_dirty(struct buffer_head *bh));
+extern void FASTCALL(buffer_insert_inode_queue(struct buffer_head *, struct inode *));
+extern void FASTCALL(buffer_insert_inode_data_queue(struct buffer_head *, struct inode *));
+
+static inline int atomic_set_buffer_dirty(struct buffer_head *bh)
+{
+	return test_and_set_bit(BH_Dirty, &bh->b_state);
+}
+
+static inline void mark_buffer_async(struct buffer_head * bh, int on)
+{
+	if (on)
+		set_bit(BH_Async, &bh->b_state);
+	else
+		clear_bit(BH_Async, &bh->b_state);
+}
+
+/*
+ * If an error happens during the make_request, this function
+ * has to be recalled. It marks the buffer as clean and not
+ * uptodate, and it notifys the upper layer about the end
+ * of the I/O.
+ */
+static inline void buffer_IO_error(struct buffer_head * bh)
+{
+	mark_buffer_clean(bh);
+	/*
+	 * b_end_io has to clear the BH_Uptodate bitflag in the error case!
+	 */
+	bh->b_end_io(bh, 0);
+}
+
+static inline void mark_buffer_dirty_inode(struct buffer_head *bh, struct inode *inode)
+{
+	mark_buffer_dirty(bh);
+	buffer_insert_inode_queue(bh, inode);
+}
+
+extern void set_buffer_flushtime(struct buffer_head *);
+extern void balance_dirty(void);
+extern int check_disk_change(kdev_t);
+extern int invalidate_inodes(struct super_block *);
+extern int invalidate_device(kdev_t, int);
+extern void invalidate_inode_pages(struct inode *);
+extern void invalidate_inode_pages2(struct address_space *);
+extern void invalidate_inode_buffers(struct inode *);
+#define invalidate_buffers(dev)	__invalidate_buffers((dev), 0)
+#define destroy_buffers(dev)	__invalidate_buffers((dev), 1)
+extern void invalidate_bdev(struct block_device *, int);
+extern void __invalidate_buffers(kdev_t dev, int);
+extern void sync_inodes(kdev_t);
+extern void sync_unlocked_inodes(void);
+extern void write_inode_now(struct inode *, int);
+extern int sync_buffers(kdev_t, int);
+extern void sync_dev(kdev_t);
+extern int fsync_dev(kdev_t);
+extern int fsync_super(struct super_block *);
+extern int fsync_no_super(kdev_t);
+extern void sync_inodes_sb(struct super_block *);
+extern int fsync_buffers_list(struct list_head *);
+static inline int fsync_inode_buffers(struct inode *inode)
+{
+	return fsync_buffers_list(&inode->i_dirty_buffers);
+}
+static inline int fsync_inode_data_buffers(struct inode *inode)
+{
+	return fsync_buffers_list(&inode->i_dirty_data_buffers);
+}
+extern int inode_has_buffers(struct inode *);
+extern int filemap_fdatasync(struct address_space *);
+extern int filemap_fdatawait(struct address_space *);
+extern void sync_supers(kdev_t);
+extern int bmap(struct inode *, int);
+extern int notify_change(struct dentry *, struct iattr *);
+extern int permission(struct inode *, int);
+extern int vfs_permission(struct inode *, int);
+extern int get_write_access(struct inode *);
+extern int deny_write_access(struct file *);
+static inline void put_write_access(struct inode * inode)
+{
+	atomic_dec(&inode->i_writecount);
+}
+static inline void allow_write_access(struct file *file)
+{
+	if (file)
+		atomic_inc(&file->f_dentry->d_inode->i_writecount);
+}
+extern int do_pipe(int *);
+
+extern int open_namei(const char *, int, int, struct nameidata *);
+
+extern int kernel_read(struct file *, unsigned long, char *, unsigned long);
+extern struct file * open_exec(const char *);
+ 
+/* fs/dcache.c -- generic fs support functions */
+extern int is_subdir(struct dentry *, struct dentry *);
+extern ino_t find_inode_number(struct dentry *, struct qstr *);
+
+/*
+ * Kernel pointers have redundant information, so we can use a
+ * scheme where we can return either an error code or a dentry
+ * pointer with the same return value.
+ *
+ * This should be a per-architecture thing, to allow different
+ * error and pointer decisions.
+ */
+static inline void *ERR_PTR(long error)
+{
+	return (void *) error;
+}
+
+static inline long PTR_ERR(const void *ptr)
+{
+	return (long) ptr;
+}
+
+static inline long IS_ERR(const void *ptr)
+{
+	return (unsigned long)ptr > (unsigned long)-1000L;
+}
+
+/*
+ * The bitmask for a lookup event:
+ *  - follow links at the end
+ *  - require a directory
+ *  - ending slashes ok even for nonexistent files
+ *  - internal "there are more path compnents" flag
+ */
+#define LOOKUP_FOLLOW		(1)
+#define LOOKUP_DIRECTORY	(2)
+#define LOOKUP_CONTINUE		(4)
+#define LOOKUP_POSITIVE		(8)
+#define LOOKUP_PARENT		(16)
+#define LOOKUP_NOALT		(32)
+/*
+ * Type of the last component on LOOKUP_PARENT
+ */
+enum {LAST_NORM, LAST_ROOT, LAST_DOT, LAST_DOTDOT, LAST_BIND};
+
+/*
+ * "descriptor" for what we're up to with a read for sendfile().
+ * This allows us to use the same read code yet
+ * have multiple different users of the data that
+ * we read from a file.
+ *
+ * The simplest case just copies the data to user
+ * mode.
+ */
+typedef struct {
+	size_t written;
+	size_t count;
+	char * buf;
+	int error;
+} read_descriptor_t;
+
+typedef int (*read_actor_t)(read_descriptor_t *, struct page *, unsigned long, unsigned long);
+
+/* needed for stackable file system support */
+extern loff_t default_llseek(struct file *file, loff_t offset, int origin);
+
+extern int FASTCALL(__user_walk(const char *, unsigned, struct nameidata *));
+extern int FASTCALL(path_init(const char *, unsigned, struct nameidata *));
+extern int FASTCALL(path_walk(const char *, struct nameidata *));
+extern int FASTCALL(path_lookup(const char *, unsigned, struct nameidata *));
+extern int FASTCALL(link_path_walk(const char *, struct nameidata *));
+extern void path_release(struct nameidata *);
+extern int follow_down(struct vfsmount **, struct dentry **);
+extern int follow_up(struct vfsmount **, struct dentry **);
+extern struct dentry * lookup_one_len(const char *, struct dentry *, int);
+extern struct dentry * lookup_hash(struct qstr *, struct dentry *);
+#define user_path_walk(name,nd)	 __user_walk(name, LOOKUP_FOLLOW|LOOKUP_POSITIVE, nd)
+#define user_path_walk_link(name,nd) __user_walk(name, LOOKUP_POSITIVE, nd)
+
+extern void iput(struct inode *);
+extern void force_delete(struct inode *);
+extern struct inode * igrab(struct inode *);
+extern ino_t iunique(struct super_block *, ino_t);
+
+typedef int (*find_inode_t)(struct inode *, unsigned long, void *);
+extern struct inode * iget4(struct super_block *, unsigned long, find_inode_t, void *);
+static inline struct inode *iget(struct super_block *sb, unsigned long ino)
+{
+	return iget4(sb, ino, NULL, NULL);
+}
+
+extern void clear_inode(struct inode *);
+extern struct inode * get_empty_inode(void);
+
+static inline struct inode * new_inode(struct super_block *sb)
+{
+	struct inode *inode = get_empty_inode();
+	if (inode) {
+		inode->i_sb = sb;
+		inode->i_dev = sb->s_dev;
+		inode->i_blkbits = sb->s_blocksize_bits;
+	}
+	return inode;
+}
+extern void remove_suid(struct inode *inode);
+
+extern void insert_inode_hash(struct inode *);
+extern void remove_inode_hash(struct inode *);
+extern struct file * get_empty_filp(void);
+extern void file_move(struct file *f, struct list_head *list);
+extern struct buffer_head * get_hash_table(kdev_t, int, int);
+extern struct buffer_head * getblk(kdev_t, int, int);
+extern void ll_rw_block(int, int, struct buffer_head * bh[]);
+extern void submit_bh(int, struct buffer_head *);
+extern int is_read_only(kdev_t);
+extern void __brelse(struct buffer_head *);
+static inline void brelse(struct buffer_head *buf)
+{
+	if (buf)
+		__brelse(buf);
+}
+extern void __bforget(struct buffer_head *);
+static inline void bforget(struct buffer_head *buf)
+{
+	if (buf)
+		__bforget(buf);
+}
+extern int set_blocksize(kdev_t, int);
+extern int sb_set_blocksize(struct super_block *, int);
+extern int sb_min_blocksize(struct super_block *, int);
+extern struct buffer_head * bread(kdev_t, int, int);
+static inline struct buffer_head * sb_bread(struct super_block *sb, int block)
+{
+	return bread(sb->s_dev, block, sb->s_blocksize);
+}
+static inline struct buffer_head * sb_getblk(struct super_block *sb, int block)
+{
+	return getblk(sb->s_dev, block, sb->s_blocksize);
+}
+static inline struct buffer_head * sb_get_hash_table(struct super_block *sb, int block)
+{
+	return get_hash_table(sb->s_dev, block, sb->s_blocksize);
+}
+extern void wakeup_bdflush(void);
+extern void put_unused_buffer_head(struct buffer_head * bh);
+extern struct buffer_head * get_unused_buffer_head(int async);
+
+extern int brw_page(int, struct page *, kdev_t, int [], int);
+
+typedef int (get_block_t)(struct inode*,long,struct buffer_head*,int);
+
+/* Generic buffer handling for block filesystems.. */
+extern int try_to_release_page(struct page * page, int gfp_mask);
+extern int discard_bh_page(struct page *, unsigned long, int);
+#define block_flushpage(page, offset) discard_bh_page(page, offset, 1)
+#define block_invalidate_page(page) discard_bh_page(page, 0, 0)
+extern int block_symlink(struct inode *, const char *, int);
+extern int block_write_full_page(struct page*, get_block_t*);
+extern int block_read_full_page(struct page*, get_block_t*);
+extern int block_prepare_write(struct page*, unsigned, unsigned, get_block_t*);
+extern int cont_prepare_write(struct page*, unsigned, unsigned, get_block_t*,
+				unsigned long *);
+extern int generic_cont_expand(struct inode *inode, loff_t size) ;
+extern int block_commit_write(struct page *page, unsigned from, unsigned to);
+extern int block_sync_page(struct page *);
+
+int generic_block_bmap(struct address_space *, long, get_block_t *);
+int generic_commit_write(struct file *, struct page *, unsigned, unsigned);
+int block_truncate_page(struct address_space *, loff_t, get_block_t *);
+extern int generic_direct_IO(int, struct inode *, struct kiobuf *, unsigned long, int, get_block_t *);
+extern int waitfor_one_page(struct page *);
+extern int writeout_one_page(struct page *);
+
+extern int generic_file_mmap(struct file *, struct vm_area_struct *);
+extern int file_read_actor(read_descriptor_t * desc, struct page *page, unsigned long offset, unsigned long size);
+extern ssize_t generic_file_read(struct file *, char *, size_t, loff_t *);
+extern ssize_t generic_file_write(struct file *, const char *, size_t, loff_t *);
+extern void do_generic_file_read(struct file *, loff_t *, read_descriptor_t *, read_actor_t);
+extern loff_t no_llseek(struct file *file, loff_t offset, int origin);
+extern loff_t generic_file_llseek(struct file *file, loff_t offset, int origin);
+extern ssize_t generic_read_dir(struct file *, char *, size_t, loff_t *);
+extern int generic_file_open(struct inode * inode, struct file * filp);
+
+extern struct file_operations generic_ro_fops;
+
+extern int vfs_readlink(struct dentry *, char *, int, const char *);
+extern int vfs_follow_link(struct nameidata *, const char *);
+extern int page_readlink(struct dentry *, char *, int);
+extern int page_follow_link(struct dentry *, struct nameidata *);
+extern struct inode_operations page_symlink_inode_operations;
+
+extern int vfs_readdir(struct file *, filldir_t, void *);
+extern int dcache_dir_open(struct inode *, struct file *);
+extern int dcache_dir_close(struct inode *, struct file *);
+extern loff_t dcache_dir_lseek(struct file *, loff_t, int);
+extern int dcache_dir_fsync(struct file *, struct dentry *, int);
+extern int dcache_readdir(struct file *, void *, filldir_t);
+extern struct file_operations dcache_dir_ops;
+
+extern struct file_system_type *get_fs_type(const char *name);
+extern struct super_block *get_super(kdev_t);
+extern void drop_super(struct super_block *sb);
+static inline int is_mounted(kdev_t dev)
+{
+	struct super_block *sb = get_super(dev);
+	if (sb) {
+		drop_super(sb);
+		return 1;
+	}
+	return 0;
+}
+unsigned long generate_cluster(kdev_t, int b[], int);
+unsigned long generate_cluster_swab32(kdev_t, int b[], int);
+extern kdev_t ROOT_DEV;
+extern char root_device_name[];
+
+
+extern void show_buffers(void);
+
+#ifdef CONFIG_BLK_DEV_INITRD
+extern unsigned int real_root_dev;
+#endif
+
+extern ssize_t char_read(struct file *, char *, size_t, loff_t *);
+extern ssize_t block_read(struct file *, char *, size_t, loff_t *);
+extern int read_ahead[];
+
+extern ssize_t char_write(struct file *, const char *, size_t, loff_t *);
+extern ssize_t block_write(struct file *, const char *, size_t, loff_t *);
+
+extern int file_fsync(struct file *, struct dentry *, int);
+extern int generic_buffer_fdatasync(struct inode *inode, unsigned long start_idx, unsigned long end_idx);
+extern int generic_osync_inode(struct inode *, int);
+#define OSYNC_METADATA (1<<0)
+#define OSYNC_DATA (1<<1)
+#define OSYNC_INODE (1<<2)
+
+extern int inode_change_ok(struct inode *, struct iattr *);
+extern int inode_setattr(struct inode *, struct iattr *);
+
+/*
+ * Common dentry functions for inclusion in the VFS
+ * or in other stackable file systems.  Some of these
+ * functions were in linux/fs/ C (VFS) files.
+ *
+ */
+
+/*
+ * Locking the parent is needed to:
+ *  - serialize directory operations
+ *  - make sure the parent doesn't change from
+ *    under us in the middle of an operation.
+ *
+ * NOTE! Right now we'd rather use a "struct inode"
+ * for this, but as I expect things to move toward
+ * using dentries instead for most things it is
+ * probably better to start with the conceptually
+ * better interface of relying on a path of dentries.
+ */
+static inline struct dentry *lock_parent(struct dentry *dentry)
+{
+	struct dentry *dir = dget(dentry->d_parent);
+
+	down(&dir->d_inode->i_sem);
+	return dir;
+}
+
+static inline struct dentry *get_parent(struct dentry *dentry)
+{
+	return dget(dentry->d_parent);
+}
+
+static inline void unlock_dir(struct dentry *dir)
+{
+	up(&dir->d_inode->i_sem);
+	dput(dir);
+}
+
+/*
+ * Whee.. Deadlock country. Happily there are only two VFS
+ * operations that does this..
+ */
+static inline void double_down(struct semaphore *s1, struct semaphore *s2)
+{
+	if (s1 != s2) {
+		if ((unsigned long) s1 < (unsigned long) s2) {
+			struct semaphore *tmp = s2;
+			s2 = s1; s1 = tmp;
+		}
+		down(s1);
+	}
+	down(s2);
+}
+
+/*
+ * Ewwwwwwww... _triple_ lock. We are guaranteed that the 3rd argument is
+ * not equal to 1st and not equal to 2nd - the first case (target is parent of
+ * source) would be already caught, the second is plain impossible (target is
+ * its own parent and that case would be caught even earlier). Very messy.
+ * I _think_ that it works, but no warranties - please, look it through.
+ * Pox on bloody lusers who mandated overwriting rename() for directories...
+ */
+
+static inline void triple_down(struct semaphore *s1,
+			       struct semaphore *s2,
+			       struct semaphore *s3)
+{
+	if (s1 != s2) {
+		if ((unsigned long) s1 < (unsigned long) s2) {
+			if ((unsigned long) s1 < (unsigned long) s3) {
+				struct semaphore *tmp = s3;
+				s3 = s1; s1 = tmp;
+			}
+			if ((unsigned long) s1 < (unsigned long) s2) {
+				struct semaphore *tmp = s2;
+				s2 = s1; s1 = tmp;
+			}
+		} else {
+			if ((unsigned long) s1 < (unsigned long) s3) {
+				struct semaphore *tmp = s3;
+				s3 = s1; s1 = tmp;
+			}
+			if ((unsigned long) s2 < (unsigned long) s3) {
+				struct semaphore *tmp = s3;
+				s3 = s2; s2 = tmp;
+			}
+		}
+		down(s1);
+	} else if ((unsigned long) s2 < (unsigned long) s3) {
+		struct semaphore *tmp = s3;
+		s3 = s2; s2 = tmp;
+	}
+	down(s2);
+	down(s3);
+}
+
+static inline void double_up(struct semaphore *s1, struct semaphore *s2)
+{
+	up(s1);
+	if (s1 != s2)
+		up(s2);
+}
+
+static inline void triple_up(struct semaphore *s1,
+			     struct semaphore *s2,
+			     struct semaphore *s3)
+{
+	up(s1);
+	if (s1 != s2)
+		up(s2);
+	up(s3);
+}
+
+static inline void double_lock(struct dentry *d1, struct dentry *d2)
+{
+	double_down(&d1->d_inode->i_sem, &d2->d_inode->i_sem);
+}
+
+static inline void double_unlock(struct dentry *d1, struct dentry *d2)
+{
+	double_up(&d1->d_inode->i_sem,&d2->d_inode->i_sem);
+	dput(d1);
+	dput(d2);
+}
+
+#endif /* __KERNEL__ */
+
+#endif /* _LINUX_FS_H */