[deliverable/linux.git] / fs / xfs / xfs_inode.h

/*
 * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc.
 * All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it would be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write the Free Software Foundation,
 * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */
#ifndef	__XFS_INODE_H__
#define	__XFS_INODE_H__

/*
 * Fork identifiers.
 */
#define	XFS_DATA_FORK	0
#define	XFS_ATTR_FORK	1

/*
 * The following xfs_ext_irec_t struct introduces a second (top) level
 * to the in-core extent allocation scheme. These structs are allocated
 * in a contiguous block, creating an indirection array where each entry
 * (irec) contains a pointer to a buffer of in-core extent records which
 * it manages. Each extent buffer is 4k in size, since 4k is the system
 * page size on Linux i386 and systems with larger page sizes don't seem
 * to gain much, if anything, by using their native page size as the
 * extent buffer size. Also, using 4k extent buffers everywhere provides
 * a consistent interface for CXFS across different platforms.
 *
 * There is currently no limit on the number of irec's (extent lists)
 * allowed, so heavily fragmented files may require an indirection array
 * which spans multiple system pages of memory. The number of extents
 * which would require this amount of contiguous memory is very large
 * and should not cause problems in the foreseeable future. However,
 * if the memory needed for the contiguous array ever becomes a problem,
 * it is possible that a third level of indirection may be required.
 */
typedef struct xfs_ext_irec {
	xfs_bmbt_rec_t	*er_extbuf;	/* block of extent records */
	xfs_extnum_t	er_extoff;	/* extent offset in file */
	xfs_extnum_t	er_extcount;	/* number of extents in page/block */
} xfs_ext_irec_t;

/*
 * File incore extent information, present for each of data & attr forks.
 */
#define	XFS_IEXT_BUFSZ		4096
#define	XFS_LINEAR_EXTS		(XFS_IEXT_BUFSZ / (uint)sizeof(xfs_bmbt_rec_t))
#define	XFS_INLINE_EXTS		2
#define	XFS_INLINE_DATA		32
typedef struct xfs_ifork {
	int			if_bytes;	/* bytes in if_u1 */
	int			if_real_bytes;	/* bytes allocated in if_u1 */
	xfs_bmbt_block_t	*if_broot;	/* file's incore btree root */
	short			if_broot_bytes;	/* bytes allocated for root */
	unsigned char		if_flags;	/* per-fork flags */
	unsigned char		if_ext_max;	/* max # of extent records */
	xfs_extnum_t		if_lastex;	/* last if_extents used */
	union {
		xfs_bmbt_rec_t	*if_extents;	/* linear map file exts */
		xfs_ext_irec_t	*if_ext_irec;	/* irec map file exts */
		char		*if_data;	/* inline file data */
	} if_u1;
	union {
		xfs_bmbt_rec_t	if_inline_ext[XFS_INLINE_EXTS];
						/* very small file extents */
		char		if_inline_data[XFS_INLINE_DATA];
						/* very small file data */
		xfs_dev_t	if_rdev;	/* dev number if special */
		uuid_t		if_uuid;	/* mount point value */
	} if_u2;
} xfs_ifork_t;

/*
 * Flags for xfs_ichgtime().
 */
#define	XFS_ICHGTIME_MOD	0x1	/* data fork modification timestamp */
#define	XFS_ICHGTIME_ACC	0x2	/* data fork access timestamp */
#define	XFS_ICHGTIME_CHG	0x4	/* inode field change timestamp */

/*
 * Per-fork incore inode flags.
 */
#define	XFS_IFINLINE	0x01	/* Inline data is read in */
#define	XFS_IFEXTENTS	0x02	/* All extent pointers are read in */
#define	XFS_IFBROOT	0x04	/* i_broot points to the bmap b-tree root */
#define	XFS_IFEXTIREC	0x08	/* Indirection array of extent blocks */

/*
 * Flags for xfs_imap() and xfs_dilocate().
 */
#define	XFS_IMAP_LOOKUP		0x1

#ifdef __KERNEL__
struct bhv_desc;
struct cred;
struct ktrace;
struct vnode;
struct xfs_buf;
struct xfs_bmap_free;
struct xfs_bmbt_irec;
struct xfs_bmbt_block;
struct xfs_inode;
struct xfs_inode_log_item;
struct xfs_mount;
struct xfs_trans;
struct xfs_dquot;

#if defined(XFS_ILOCK_TRACE)
#define XFS_ILOCK_KTRACE_SIZE	32
extern ktrace_t *xfs_ilock_trace_buf;
extern void xfs_ilock_trace(struct xfs_inode *, int, unsigned int, inst_t *);
#else
#define	xfs_ilock_trace(i,n,f,ra)
#endif

typedef struct dm_attrs_s {
	__uint32_t	da_dmevmask;	/* DMIG event mask */
	__uint16_t	da_dmstate;	/* DMIG state info */
	__uint16_t	da_pad;		/* DMIG extra padding */
} dm_attrs_t;

typedef struct xfs_iocore {
	void			*io_obj;	/* pointer to container
						 * inode or dcxvn structure */
	struct xfs_mount	*io_mount;	/* fs mount struct ptr */
#ifdef DEBUG
	mrlock_t		*io_lock;	/* inode IO lock */
	mrlock_t		*io_iolock;	/* inode IO lock */
#endif

	/* I/O state */
	xfs_fsize_t		io_new_size;	/* sz when write completes */

	/* Miscellaneous state. */
	unsigned int		io_flags;	/* IO related flags */

	/* DMAPI state */
	dm_attrs_t		io_dmattrs;

} xfs_iocore_t;

#define        io_dmevmask     io_dmattrs.da_dmevmask
#define        io_dmstate      io_dmattrs.da_dmstate

#define XFS_IO_INODE(io)	((xfs_inode_t *) ((io)->io_obj))
#define XFS_IO_DCXVN(io)	((dcxvn_t *) ((io)->io_obj))

/*
 * Flags in the flags field
 */

#define XFS_IOCORE_RT		0x1

/*
 * xfs_iocore prototypes
 */

extern void xfs_iocore_inode_init(struct xfs_inode *);
extern void xfs_iocore_inode_reinit(struct xfs_inode *);


/*
 * This is the type used in the xfs inode hash table.
 * An array of these is allocated for each mounted
 * file system to hash the inodes for that file system.
 */
typedef struct xfs_ihash {
	struct xfs_inode	*ih_next;
	rwlock_t		ih_lock;
	uint			ih_version;
} xfs_ihash_t;

#define XFS_IHASH(mp,ino) ((mp)->m_ihash + (((uint)(ino)) % (mp)->m_ihsize))

/*
 * This is the xfs inode cluster hash.  This hash is used by xfs_iflush to
 * find inodes that share a cluster and can be flushed to disk at the same
 * time.
 */
typedef struct xfs_chashlist {
	struct xfs_chashlist	*chl_next;
	struct xfs_inode	*chl_ip;
	xfs_daddr_t		chl_blkno;	/* starting block number of
						 * the cluster */
	struct xfs_buf		*chl_buf;	/* the inode buffer */
} xfs_chashlist_t;

typedef struct xfs_chash {
	xfs_chashlist_t		*ch_list;
	lock_t			ch_lock;
} xfs_chash_t;

#define XFS_CHASH(mp,blk) ((mp)->m_chash + (((uint)blk) % (mp)->m_chsize))


/*
 * This is the xfs in-core inode structure.
 * Most of the on-disk inode is embedded in the i_d field.
 *
 * The extent pointers/inline file space, however, are managed
 * separately.  The memory for this information is pointed to by
 * the if_u1 unions depending on the type of the data.
 * This is used to linearize the array of extents for fast in-core
 * access.  This is used until the file's number of extents
 * surpasses XFS_MAX_INCORE_EXTENTS, at which point all extent pointers
 * are accessed through the buffer cache.
 *
 * Other state kept in the in-core inode is used for identification,
 * locking, transactional updating, etc of the inode.
 *
 * Generally, we do not want to hold the i_rlock while holding the
 * i_ilock. Hierarchy is i_iolock followed by i_rlock.
 *
 * xfs_iptr_t contains all the inode fields upto and including the
 * i_mnext and i_mprev fields, it is used as a marker in the inode
 * chain off the mount structure by xfs_sync calls.
 */

typedef struct {
	struct xfs_ihash	*ip_hash;	/* pointer to hash header */
	struct xfs_inode	*ip_next;	/* inode hash link forw */
	struct xfs_inode	*ip_mnext;	/* next inode in mount list */
	struct xfs_inode	*ip_mprev;	/* ptr to prev inode */
	struct xfs_inode	**ip_prevp;	/* ptr to prev i_next */
	struct xfs_mount	*ip_mount;	/* fs mount struct ptr */
} xfs_iptr_t;

typedef struct xfs_inode {
	/* Inode linking and identification information. */
	struct xfs_ihash	*i_hash;	/* pointer to hash header */
	struct xfs_inode	*i_next;	/* inode hash link forw */
	struct xfs_inode	*i_mnext;	/* next inode in mount list */
	struct xfs_inode	*i_mprev;	/* ptr to prev inode */
	struct xfs_inode	**i_prevp;	/* ptr to prev i_next */
	struct xfs_mount	*i_mount;	/* fs mount struct ptr */
	struct list_head	i_reclaim;	/* reclaim list */
	struct bhv_desc		i_bhv_desc;	/* inode behavior descriptor*/
	struct xfs_dquot	*i_udquot;	/* user dquot */
	struct xfs_dquot	*i_gdquot;	/* group dquot */

	/* Inode location stuff */
	xfs_ino_t		i_ino;		/* inode number (agno/agino)*/
	xfs_daddr_t		i_blkno;	/* blkno of inode buffer */
	ushort			i_len;		/* len of inode buffer */
	ushort			i_boffset;	/* off of inode in buffer */

	/* Extent information. */
	xfs_ifork_t		*i_afp;		/* attribute fork pointer */
	xfs_ifork_t		i_df;		/* data fork */

	/* Transaction and locking information. */
	struct xfs_trans	*i_transp;	/* ptr to owning transaction*/
	struct xfs_inode_log_item *i_itemp;	/* logging information */
	mrlock_t		i_lock;		/* inode lock */
	mrlock_t		i_iolock;	/* inode IO lock */
	sema_t			i_flock;	/* inode flush lock */
	atomic_t		i_pincount;	/* inode pin count */
	wait_queue_head_t	i_ipin_wait;	/* inode pinning wait queue */
#ifdef HAVE_REFCACHE
	struct xfs_inode	**i_refcache;	/* ptr to entry in ref cache */
	struct xfs_inode	*i_release;	/* inode to unref */
#endif
	/* I/O state */
	xfs_iocore_t		i_iocore;	/* I/O core */

	/* Miscellaneous state. */
	unsigned short		i_flags;	/* see defined flags below */
	unsigned char		i_update_core;	/* timestamps/size is dirty */
	unsigned char		i_update_size;	/* di_size field is dirty */
	unsigned int		i_gen;		/* generation count */
	unsigned int		i_delayed_blks;	/* count of delay alloc blks */

	xfs_dinode_core_t	i_d;		/* most of ondisk inode */
	xfs_chashlist_t		*i_chash;	/* cluster hash list header */
	struct xfs_inode	*i_cnext;	/* cluster hash link forward */
	struct xfs_inode	*i_cprev;	/* cluster hash link backward */

	/* Trace buffers per inode. */
#ifdef XFS_BMAP_TRACE
	struct ktrace		*i_xtrace;	/* inode extent list trace */
#endif
#ifdef XFS_BMBT_TRACE
	struct ktrace		*i_btrace;	/* inode bmap btree trace */
#endif
#ifdef XFS_RW_TRACE
	struct ktrace		*i_rwtrace;	/* inode read/write trace */
#endif
#ifdef XFS_ILOCK_TRACE
	struct ktrace		*i_lock_trace;	/* inode lock/unlock trace */
#endif
#ifdef XFS_DIR2_TRACE
	struct ktrace		*i_dir_trace;	/* inode directory trace */
#endif
} xfs_inode_t;

#endif	/* __KERNEL__ */


/*
 * Fork handling.
 */
#define	XFS_IFORK_PTR(ip,w)		\
	((w) == XFS_DATA_FORK ? &(ip)->i_df : (ip)->i_afp)
#define	XFS_IFORK_Q(ip)			XFS_CFORK_Q(&(ip)->i_d)
#define	XFS_IFORK_DSIZE(ip)		XFS_CFORK_DSIZE(&ip->i_d, ip->i_mount)
#define	XFS_IFORK_ASIZE(ip)		XFS_CFORK_ASIZE(&ip->i_d, ip->i_mount)
#define	XFS_IFORK_SIZE(ip,w)		XFS_CFORK_SIZE(&ip->i_d, ip->i_mount, w)
#define	XFS_IFORK_FORMAT(ip,w)		XFS_CFORK_FORMAT(&ip->i_d, w)
#define	XFS_IFORK_FMT_SET(ip,w,n)	XFS_CFORK_FMT_SET(&ip->i_d, w, n)
#define	XFS_IFORK_NEXTENTS(ip,w)	XFS_CFORK_NEXTENTS(&ip->i_d, w)
#define	XFS_IFORK_NEXT_SET(ip,w,n)	XFS_CFORK_NEXT_SET(&ip->i_d, w, n)


#ifdef __KERNEL__

/*
 * In-core inode flags.
 */
#define XFS_IGRIO	0x0001  /* inode used for guaranteed rate i/o */
#define XFS_IUIOSZ	0x0002  /* inode i/o sizes have been explicitly set */
#define XFS_IQUIESCE    0x0004  /* we have started quiescing for this inode */
#define XFS_IRECLAIM    0x0008  /* we have started reclaiming this inode    */
#define XFS_ISTALE	0x0010	/* inode has been staled */
#define XFS_IRECLAIMABLE 0x0020 /* inode can be reclaimed */
#define XFS_INEW	0x0040

/*
 * Flags for inode locking.
 */
#define	XFS_IOLOCK_EXCL		0x001
#define	XFS_IOLOCK_SHARED	0x002
#define	XFS_ILOCK_EXCL		0x004
#define	XFS_ILOCK_SHARED	0x008
#define	XFS_IUNLOCK_NONOTIFY	0x010
/*	XFS_IOLOCK_NESTED	0x020 */
#define XFS_EXTENT_TOKEN_RD	0x040
#define XFS_SIZE_TOKEN_RD	0x080
#define XFS_EXTSIZE_RD		(XFS_EXTENT_TOKEN_RD|XFS_SIZE_TOKEN_RD)
#define XFS_WILLLEND		0x100	/* Always acquire tokens for lending */
#define XFS_EXTENT_TOKEN_WR	(XFS_EXTENT_TOKEN_RD | XFS_WILLLEND)
#define XFS_SIZE_TOKEN_WR       (XFS_SIZE_TOKEN_RD | XFS_WILLLEND)
#define XFS_EXTSIZE_WR		(XFS_EXTSIZE_RD | XFS_WILLLEND)
/*	XFS_SIZE_TOKEN_WANT	0x200 */

#define XFS_LOCK_MASK	\
	(XFS_IOLOCK_EXCL | XFS_IOLOCK_SHARED | XFS_ILOCK_EXCL | \
	 XFS_ILOCK_SHARED | XFS_EXTENT_TOKEN_RD | XFS_SIZE_TOKEN_RD | \
	 XFS_WILLLEND)

/*
 * Flags for xfs_iflush()
 */
#define	XFS_IFLUSH_DELWRI_ELSE_SYNC	1
#define	XFS_IFLUSH_DELWRI_ELSE_ASYNC	2
#define	XFS_IFLUSH_SYNC			3
#define	XFS_IFLUSH_ASYNC		4
#define	XFS_IFLUSH_DELWRI		5

/*
 * Flags for xfs_itruncate_start().
 */
#define	XFS_ITRUNC_DEFINITE	0x1
#define	XFS_ITRUNC_MAYBE	0x2

#define	XFS_ITOV(ip)		BHV_TO_VNODE(XFS_ITOBHV(ip))
#define	XFS_ITOV_NULL(ip)	BHV_TO_VNODE_NULL(XFS_ITOBHV(ip))
#define	XFS_ITOBHV(ip)		((struct bhv_desc *)(&((ip)->i_bhv_desc)))
#define	XFS_BHVTOI(bhvp)	((xfs_inode_t *)((char *)(bhvp) - \
				(char *)&(((xfs_inode_t *)0)->i_bhv_desc)))
#define BHV_IS_XFS(bdp)		(BHV_OPS(bdp) == &xfs_vnodeops)

/*
 * For multiple groups support: if S_ISGID bit is set in the parent
 * directory, group of new file is set to that of the parent, and
 * new subdirectory gets S_ISGID bit from parent.
 */
#define XFS_INHERIT_GID(pip, vfsp)	\
	(((vfsp)->vfs_flag & VFS_GRPID) || ((pip)->i_d.di_mode & S_ISGID))

/*
 * xfs_iget.c prototypes.
 */

#define IGET_CREATE	1

void		xfs_ihash_init(struct xfs_mount *);
void		xfs_ihash_free(struct xfs_mount *);
void		xfs_chash_init(struct xfs_mount *);
void		xfs_chash_free(struct xfs_mount *);
xfs_inode_t	*xfs_inode_incore(struct xfs_mount *, xfs_ino_t,
				  struct xfs_trans *);
void            xfs_inode_lock_init(xfs_inode_t *, struct vnode *);
int		xfs_iget(struct xfs_mount *, struct xfs_trans *, xfs_ino_t,
			 uint, uint, xfs_inode_t **, xfs_daddr_t);
void		xfs_iput(xfs_inode_t *, uint);
void		xfs_iput_new(xfs_inode_t *, uint);
void		xfs_ilock(xfs_inode_t *, uint);
int		xfs_ilock_nowait(xfs_inode_t *, uint);
void		xfs_iunlock(xfs_inode_t *, uint);
void		xfs_ilock_demote(xfs_inode_t *, uint);
void		xfs_iflock(xfs_inode_t *);
int		xfs_iflock_nowait(xfs_inode_t *);
uint		xfs_ilock_map_shared(xfs_inode_t *);
void		xfs_iunlock_map_shared(xfs_inode_t *, uint);
void		xfs_ifunlock(xfs_inode_t *);
void		xfs_ireclaim(xfs_inode_t *);
int		xfs_finish_reclaim(xfs_inode_t *, int, int);
int		xfs_finish_reclaim_all(struct xfs_mount *, int);

/*
 * xfs_inode.c prototypes.
 */
int		xfs_itobp(struct xfs_mount *, struct xfs_trans *,
			  xfs_inode_t *, xfs_dinode_t **, struct xfs_buf **,
			  xfs_daddr_t);
int		xfs_iread(struct xfs_mount *, struct xfs_trans *, xfs_ino_t,
			  xfs_inode_t **, xfs_daddr_t);
int		xfs_iread_extents(struct xfs_trans *, xfs_inode_t *, int);
int		xfs_ialloc(struct xfs_trans *, xfs_inode_t *, mode_t,
			   xfs_nlink_t, xfs_dev_t, struct cred *, xfs_prid_t,
			   int, struct xfs_buf **, boolean_t *, xfs_inode_t **);
void		xfs_xlate_dinode_core(xfs_caddr_t, struct xfs_dinode_core *,
					int);
uint		xfs_ip2xflags(struct xfs_inode *);
uint		xfs_dic2xflags(struct xfs_dinode_core *);
int		xfs_ifree(struct xfs_trans *, xfs_inode_t *,
			   struct xfs_bmap_free *);
void		xfs_itruncate_start(xfs_inode_t *, uint, xfs_fsize_t);
int		xfs_itruncate_finish(struct xfs_trans **, xfs_inode_t *,
				     xfs_fsize_t, int, int);
int		xfs_iunlink(struct xfs_trans *, xfs_inode_t *);
int		xfs_igrow_start(xfs_inode_t *, xfs_fsize_t, struct cred *);
void		xfs_igrow_finish(struct xfs_trans *, xfs_inode_t *,
				 xfs_fsize_t, int);

void		xfs_idestroy_fork(xfs_inode_t *, int);
void		xfs_idestroy(xfs_inode_t *);
void		xfs_idata_realloc(xfs_inode_t *, int, int);
void		xfs_iextract(xfs_inode_t *);
void		xfs_iext_realloc(xfs_inode_t *, int, int);
void		xfs_iroot_realloc(xfs_inode_t *, int, int);
void		xfs_ipin(xfs_inode_t *);
void		xfs_iunpin(xfs_inode_t *);
int		xfs_iextents_copy(xfs_inode_t *, xfs_bmbt_rec_t *, int);
int		xfs_iflush(xfs_inode_t *, uint);
void		xfs_iflush_all(struct xfs_mount *);
int		xfs_iaccess(xfs_inode_t *, mode_t, cred_t *);
uint		xfs_iroundup(uint);
void		xfs_ichgtime(xfs_inode_t *, int);
xfs_fsize_t	xfs_file_last_byte(xfs_inode_t *);
void		xfs_lock_inodes(xfs_inode_t **, int, int, uint);

xfs_inode_t	*xfs_vtoi(struct vnode *vp);

void		xfs_synchronize_atime(xfs_inode_t *);

xfs_bmbt_rec_t	*xfs_iext_get_ext(xfs_ifork_t *, xfs_extnum_t);
void		xfs_iext_insert(xfs_ifork_t *, xfs_extnum_t, xfs_extnum_t,
				xfs_bmbt_irec_t *);
void		xfs_iext_add(xfs_ifork_t *, xfs_extnum_t, int);
void		xfs_iext_add_indirect_multi(xfs_ifork_t *, int, xfs_extnum_t, int);
void		xfs_iext_remove(xfs_ifork_t *, xfs_extnum_t, int);
void		xfs_iext_remove_inline(xfs_ifork_t *, xfs_extnum_t, int);
void		xfs_iext_remove_direct(xfs_ifork_t *, xfs_extnum_t, int);
void		xfs_iext_remove_indirect(xfs_ifork_t *, xfs_extnum_t, int);
void		xfs_iext_realloc_direct(xfs_ifork_t *, int);
void		xfs_iext_realloc_indirect(xfs_ifork_t *, int);
void		xfs_iext_indirect_to_direct(xfs_ifork_t *);
void		xfs_iext_direct_to_inline(xfs_ifork_t *, xfs_extnum_t);
void		xfs_iext_inline_to_direct(xfs_ifork_t *, int);
void		xfs_iext_destroy(xfs_ifork_t *);
xfs_bmbt_rec_t	*xfs_iext_bno_to_ext(xfs_ifork_t *, xfs_fileoff_t, int *);
xfs_ext_irec_t	*xfs_iext_bno_to_irec(xfs_ifork_t *, xfs_fileoff_t, int *);
xfs_ext_irec_t	*xfs_iext_idx_to_irec(xfs_ifork_t *, xfs_extnum_t *, int *, int);
void		xfs_iext_irec_init(xfs_ifork_t *);
xfs_ext_irec_t *xfs_iext_irec_new(xfs_ifork_t *, int);
void		xfs_iext_irec_remove(xfs_ifork_t *, int);
void		xfs_iext_irec_compact(xfs_ifork_t *);
void		xfs_iext_irec_compact_pages(xfs_ifork_t *);
void		xfs_iext_irec_compact_full(xfs_ifork_t *);
void		xfs_iext_irec_update_extoffs(xfs_ifork_t *, int, int);

#define xfs_ipincount(ip)	((unsigned int) atomic_read(&ip->i_pincount))

#ifdef DEBUG
void		xfs_isize_check(struct xfs_mount *, xfs_inode_t *, xfs_fsize_t);
#else	/* DEBUG */
#define xfs_isize_check(mp, ip, isize)
#endif	/* DEBUG */

#if defined(DEBUG)
void		xfs_inobp_check(struct xfs_mount *, struct xfs_buf *);
#else
#define	xfs_inobp_check(mp, bp)
#endif /* DEBUG */

extern struct kmem_zone	*xfs_chashlist_zone;
extern struct kmem_zone	*xfs_ifork_zone;
extern struct kmem_zone	*xfs_inode_zone;
extern struct kmem_zone	*xfs_ili_zone;
extern struct vnodeops	xfs_vnodeops;

#endif	/* __KERNEL__ */

#endif	/* __XFS_INODE_H__ */
Commit	Line	Data
1da177e4	1	/*
7b718769 NS	2	* Copyright (c) 2000-2003,2005 Silicon Graphics, Inc.
7b718769 NS	3	* All Rights Reserved.
1da177e4	4	*
7b718769 NS	5	* This program is free software; you can redistribute it and/or
7b718769 NS	6	* modify it under the terms of the GNU General Public License as
1da177e4 LT	7	* published by the Free Software Foundation.
1da177e4 LT	8	*
7b718769 NS	9	* This program is distributed in the hope that it would be useful,
	10	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	12	* GNU General Public License for more details.
1da177e4	13	*
7b718769 NS	14	* You should have received a copy of the GNU General Public License
	15	* along with this program; if not, write the Free Software Foundation,
	16	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
1da177e4 LT	17	*/
	18	#ifndef __XFS_INODE_H__
	19	#define __XFS_INODE_H__
	20
a844f451 NS	21	/*
	22	* Fork identifiers.
	23	*/
	24	#define XFS_DATA_FORK 0
	25	#define XFS_ATTR_FORK 1
	26
0293ce3a MK	27	/*
	28	* The following xfs_ext_irec_t struct introduces a second (top) level
	29	* to the in-core extent allocation scheme. These structs are allocated
	30	* in a contiguous block, creating an indirection array where each entry
	31	* (irec) contains a pointer to a buffer of in-core extent records which
	32	* it manages. Each extent buffer is 4k in size, since 4k is the system
	33	* page size on Linux i386 and systems with larger page sizes don't seem
	34	* to gain much, if anything, by using their native page size as the
	35	* extent buffer size. Also, using 4k extent buffers everywhere provides
	36	* a consistent interface for CXFS across different platforms.
	37	*
	38	* There is currently no limit on the number of irec's (extent lists)
	39	* allowed, so heavily fragmented files may require an indirection array
	40	* which spans multiple system pages of memory. The number of extents
	41	* which would require this amount of contiguous memory is very large
	42	* and should not cause problems in the foreseeable future. However,
	43	* if the memory needed for the contiguous array ever becomes a problem,
	44	* it is possible that a third level of indirection may be required.
	45	*/
	46	typedef struct xfs_ext_irec {
	47	xfs_bmbt_rec_t er_extbuf; / block of extent records */
	48	xfs_extnum_t er_extoff; /* extent offset in file */
	49	xfs_extnum_t er_extcount; /* number of extents in page/block */
	50	} xfs_ext_irec_t;
	51
1da177e4 LT	52	/*
	53	* File incore extent information, present for each of data & attr forks.
	54	*/
0293ce3a MK	55	#define XFS_IEXT_BUFSZ 4096
	56	#define XFS_LINEAR_EXTS (XFS_IEXT_BUFSZ / (uint)sizeof(xfs_bmbt_rec_t))
	57	#define XFS_INLINE_EXTS 2
	58	#define XFS_INLINE_DATA 32
1da177e4 LT	59	typedef struct xfs_ifork {
	60	int if_bytes; /* bytes in if_u1 */
	61	int if_real_bytes; /* bytes allocated in if_u1 */
	62	xfs_bmbt_block_t if_broot; / file's incore btree root */
	63	short if_broot_bytes; /* bytes allocated for root */
	64	unsigned char if_flags; /* per-fork flags */
	65	unsigned char if_ext_max; /* max # of extent records */
	66	xfs_extnum_t if_lastex; /* last if_extents used */
	67	union {
	68	xfs_bmbt_rec_t if_extents; / linear map file exts */
0293ce3a	69	xfs_ext_irec_t if_ext_irec; / irec map file exts */
1da177e4 LT	70	char if_data; / inline file data */
	71	} if_u1;
	72	union {
	73	xfs_bmbt_rec_t if_inline_ext[XFS_INLINE_EXTS];
	74	/* very small file extents */
	75	char if_inline_data[XFS_INLINE_DATA];
	76	/* very small file data */
	77	xfs_dev_t if_rdev; /* dev number if special */
	78	uuid_t if_uuid; /* mount point value */
	79	} if_u2;
	80	} xfs_ifork_t;
	81
	82	/*
	83	* Flags for xfs_ichgtime().
	84	*/
	85	#define XFS_ICHGTIME_MOD 0x1 /* data fork modification timestamp */
	86	#define XFS_ICHGTIME_ACC 0x2 /* data fork access timestamp */
	87	#define XFS_ICHGTIME_CHG 0x4 /* inode field change timestamp */
	88
	89	/*
	90	* Per-fork incore inode flags.
	91	*/
0293ce3a MK	92	#define XFS_IFINLINE 0x01 /* Inline data is read in */
	93	#define XFS_IFEXTENTS 0x02 /* All extent pointers are read in */
	94	#define XFS_IFBROOT 0x04 /* i_broot points to the bmap b-tree root */
	95	#define XFS_IFEXTIREC 0x08 /* Indirection array of extent blocks */
1da177e4 LT	96
	97	/*
	98	* Flags for xfs_imap() and xfs_dilocate().
	99	*/
	100	#define XFS_IMAP_LOOKUP 0x1
	101
1da177e4 LT	102	#ifdef __KERNEL__
	103	struct bhv_desc;
	104	struct cred;
	105	struct ktrace;
	106	struct vnode;
	107	struct xfs_buf;
	108	struct xfs_bmap_free;
	109	struct xfs_bmbt_irec;
	110	struct xfs_bmbt_block;
	111	struct xfs_inode;
	112	struct xfs_inode_log_item;
	113	struct xfs_mount;
	114	struct xfs_trans;
	115	struct xfs_dquot;
	116
	117	#if defined(XFS_ILOCK_TRACE)
	118	#define XFS_ILOCK_KTRACE_SIZE 32
	119	extern ktrace_t *xfs_ilock_trace_buf;
	120	extern void xfs_ilock_trace(struct xfs_inode , int, unsigned int, inst_t );
	121	#else
	122	#define xfs_ilock_trace(i,n,f,ra)
	123	#endif
	124
1da177e4 LT	125	typedef struct dm_attrs_s {
	126	__uint32_t da_dmevmask; /* DMIG event mask */
	127	__uint16_t da_dmstate; /* DMIG state info */
	128	__uint16_t da_pad; /* DMIG extra padding */
	129	} dm_attrs_t;
	130
	131	typedef struct xfs_iocore {
	132	void io_obj; / pointer to container
	133	* inode or dcxvn structure */
	134	struct xfs_mount io_mount; / fs mount struct ptr */
	135	#ifdef DEBUG
	136	mrlock_t io_lock; / inode IO lock */
	137	mrlock_t io_iolock; / inode IO lock */
	138	#endif
	139
	140	/* I/O state */
	141	xfs_fsize_t io_new_size; /* sz when write completes */
	142
	143	/* Miscellaneous state. */
	144	unsigned int io_flags; /* IO related flags */
	145
	146	/* DMAPI state */
	147	dm_attrs_t io_dmattrs;
	148
	149	} xfs_iocore_t;
	150
	151	#define io_dmevmask io_dmattrs.da_dmevmask
	152	#define io_dmstate io_dmattrs.da_dmstate
	153
	154	#define XFS_IO_INODE(io) ((xfs_inode_t *) ((io)->io_obj))
	155	#define XFS_IO_DCXVN(io) ((dcxvn_t *) ((io)->io_obj))
	156
	157	/*
	158	* Flags in the flags field
	159	*/
	160
	161	#define XFS_IOCORE_RT 0x1
	162
	163	/*
	164	* xfs_iocore prototypes
	165	*/
	166
	167	extern void xfs_iocore_inode_init(struct xfs_inode *);
	168	extern void xfs_iocore_inode_reinit(struct xfs_inode *);
	169
	170
	171	/*
	172	* This is the type used in the xfs inode hash table.
	173	* An array of these is allocated for each mounted
	174	* file system to hash the inodes for that file system.
	175	*/
	176	typedef struct xfs_ihash {
	177	struct xfs_inode *ih_next;
	178	rwlock_t ih_lock;
	179	uint ih_version;
	180	} xfs_ihash_t;
	181
	182	#define XFS_IHASH(mp,ino) ((mp)->m_ihash + (((uint)(ino)) % (mp)->m_ihsize))
	183
	184	/*
	185	* This is the xfs inode cluster hash. This hash is used by xfs_iflush to
	186	* find inodes that share a cluster and can be flushed to disk at the same
	187	* time.
	188	*/
189	typedef struct xfs_chashlist {
190	struct xfs_chashlist *chl_next;
191	struct xfs_inode *chl_ip;
192	xfs_daddr_t chl_blkno; /* starting block number of
193	* the cluster */
194	struct xfs_buf chl_buf; / the inode buffer */
195	} xfs_chashlist_t;
196
197	typedef struct xfs_chash {
198	xfs_chashlist_t *ch_list;
199	lock_t ch_lock;
200	} xfs_chash_t;
201
202	#define XFS_CHASH(mp,blk) ((mp)->m_chash + (((uint)blk) % (mp)->m_chsize))
203
204
205	/*
206	* This is the xfs in-core inode structure.
207	* Most of the on-disk inode is embedded in the i_d field.
208	*
209	* The extent pointers/inline file space, however, are managed
210	* separately. The memory for this information is pointed to by
211	* the if_u1 unions depending on the type of the data.
212	* This is used to linearize the array of extents for fast in-core
213	* access. This is used until the file's number of extents
214	* surpasses XFS_MAX_INCORE_EXTENTS, at which point all extent pointers
215	* are accessed through the buffer cache.
216	*
217	* Other state kept in the in-core inode is used for identification,
218	* locking, transactional updating, etc of the inode.
219	*
220	* Generally, we do not want to hold the i_rlock while holding the
221	* i_ilock. Hierarchy is i_iolock followed by i_rlock.
222	*
223	* xfs_iptr_t contains all the inode fields upto and including the
224	* i_mnext and i_mprev fields, it is used as a marker in the inode
225	* chain off the mount structure by xfs_sync calls.
226	*/
227
228	typedef struct {
229	struct xfs_ihash ip_hash; / pointer to hash header */
230	struct xfs_inode ip_next; / inode hash link forw */
231	struct xfs_inode ip_mnext; / next inode in mount list */
232	struct xfs_inode ip_mprev; / ptr to prev inode */
233	struct xfs_inode *ip_prevp; / ptr to prev i_next */
234	struct xfs_mount ip_mount; / fs mount struct ptr */
235	} xfs_iptr_t;
236
237	typedef struct xfs_inode {
238	/* Inode linking and identification information. */
239	struct xfs_ihash i_hash; / pointer to hash header */
240	struct xfs_inode i_next; / inode hash link forw */
241	struct xfs_inode i_mnext; / next inode in mount list */
242	struct xfs_inode i_mprev; / ptr to prev inode */
243	struct xfs_inode *i_prevp; / ptr to prev i_next */
244	struct xfs_mount i_mount; / fs mount struct ptr */
245	struct list_head i_reclaim; /* reclaim list */
246	struct bhv_desc i_bhv_desc; /* inode behavior descriptor*/
247	struct xfs_dquot i_udquot; / user dquot */
248	struct xfs_dquot i_gdquot; / group dquot */
249
250	/* Inode location stuff */
251	xfs_ino_t i_ino; /* inode number (agno/agino)*/
252	xfs_daddr_t i_blkno; /* blkno of inode buffer */
253	ushort i_len; /* len of inode buffer */
254	ushort i_boffset; /* off of inode in buffer */
255
256	/* Extent information. */
257	xfs_ifork_t i_afp; / attribute fork pointer */
258	xfs_ifork_t i_df; /* data fork */
259
260	/* Transaction and locking information. */
261	struct xfs_trans i_transp; / ptr to owning transaction*/
262	struct xfs_inode_log_item i_itemp; / logging information */
263	mrlock_t i_lock; /* inode lock */
264	mrlock_t i_iolock; /* inode IO lock */
265	sema_t i_flock; /* inode flush lock */
266	atomic_t i_pincount; /* inode pin count */
267	wait_queue_head_t i_ipin_wait; /* inode pinning wait queue */
268	#ifdef HAVE_REFCACHE
269	struct xfs_inode *i_refcache; / ptr to entry in ref cache */
270	struct xfs_inode i_release; / inode to unref */
271	#endif
272	/* I/O state */
273	xfs_iocore_t i_iocore; /* I/O core */
274
275	/* Miscellaneous state. */
276	unsigned short i_flags; /* see defined flags below */
277	unsigned char i_update_core; /* timestamps/size is dirty */
278	unsigned char i_update_size; /* di_size field is dirty */
279	unsigned int i_gen; /* generation count */
280	unsigned int i_delayed_blks; /* count of delay alloc blks */
281
282	xfs_dinode_core_t i_d; /* most of ondisk inode */
283	xfs_chashlist_t i_chash; / cluster hash list header */
284	struct xfs_inode i_cnext; / cluster hash link forward */
285	struct xfs_inode i_cprev; / cluster hash link backward */
286
287	/* Trace buffers per inode. */
288	#ifdef XFS_BMAP_TRACE
289	struct ktrace i_xtrace; / inode extent list trace */
290	#endif
291	#ifdef XFS_BMBT_TRACE
292	struct ktrace i_btrace; / inode bmap btree trace */
293	#endif
294	#ifdef XFS_RW_TRACE
295	struct ktrace i_rwtrace; / inode read/write trace */
296	#endif
297	#ifdef XFS_ILOCK_TRACE
298	struct ktrace i_lock_trace; / inode lock/unlock trace */
299	#endif
300	#ifdef XFS_DIR2_TRACE
301	struct ktrace i_dir_trace; / inode directory trace */
302	#endif
303	} xfs_inode_t;
304
305	#endif /* __KERNEL__ */
306
307
308	/*
309	* Fork handling.
310	*/
a844f451 NS	311	#define XFS_IFORK_PTR(ip,w) \
a844f451 NS	312	((w) == XFS_DATA_FORK ? &(ip)->i_df : (ip)->i_afp)
1da177e4	313	#define XFS_IFORK_Q(ip) XFS_CFORK_Q(&(ip)->i_d)
1da177e4	314	#define XFS_IFORK_DSIZE(ip) XFS_CFORK_DSIZE(&ip->i_d, ip->i_mount)
1da177e4	315	#define XFS_IFORK_ASIZE(ip) XFS_CFORK_ASIZE(&ip->i_d, ip->i_mount)
1da177e4	316	#define XFS_IFORK_SIZE(ip,w) XFS_CFORK_SIZE(&ip->i_d, ip->i_mount, w)
1da177e4	317	#define XFS_IFORK_FORMAT(ip,w) XFS_CFORK_FORMAT(&ip->i_d, w)
1da177e4	318	#define XFS_IFORK_FMT_SET(ip,w,n) XFS_CFORK_FMT_SET(&ip->i_d, w, n)
1da177e4	319	#define XFS_IFORK_NEXTENTS(ip,w) XFS_CFORK_NEXTENTS(&ip->i_d, w)
1da177e4	320	#define XFS_IFORK_NEXT_SET(ip,w,n) XFS_CFORK_NEXT_SET(&ip->i_d, w, n)
1da177e4 LT	321
	322
	323	#ifdef __KERNEL__
	324
	325	/*
	326	* In-core inode flags.
	327	*/
	328	#define XFS_IGRIO 0x0001 /* inode used for guaranteed rate i/o */
	329	#define XFS_IUIOSZ 0x0002 /* inode i/o sizes have been explicitly set */
	330	#define XFS_IQUIESCE 0x0004 /* we have started quiescing for this inode */
	331	#define XFS_IRECLAIM 0x0008 /* we have started reclaiming this inode */
	332	#define XFS_ISTALE 0x0010 /* inode has been staled */
	333	#define XFS_IRECLAIMABLE 0x0020 /* inode can be reclaimed */
	334	#define XFS_INEW 0x0040
	335
	336	/*
	337	* Flags for inode locking.
	338	*/
	339	#define XFS_IOLOCK_EXCL 0x001
	340	#define XFS_IOLOCK_SHARED 0x002
	341	#define XFS_ILOCK_EXCL 0x004
	342	#define XFS_ILOCK_SHARED 0x008
	343	#define XFS_IUNLOCK_NONOTIFY 0x010
30dab21a	344	/* XFS_IOLOCK_NESTED 0x020 */
1da177e4 LT	345	#define XFS_EXTENT_TOKEN_RD 0x040
	346	#define XFS_SIZE_TOKEN_RD 0x080
	347	#define XFS_EXTSIZE_RD (XFS_EXTENT_TOKEN_RD\|XFS_SIZE_TOKEN_RD)
	348	#define XFS_WILLLEND 0x100 /* Always acquire tokens for lending */
	349	#define XFS_EXTENT_TOKEN_WR (XFS_EXTENT_TOKEN_RD \| XFS_WILLLEND)
	350	#define XFS_SIZE_TOKEN_WR (XFS_SIZE_TOKEN_RD \| XFS_WILLLEND)
	351	#define XFS_EXTSIZE_WR (XFS_EXTSIZE_RD \| XFS_WILLLEND)
30dab21a	352	/* XFS_SIZE_TOKEN_WANT 0x200 */
1da177e4 LT	353
	354	#define XFS_LOCK_MASK \
	355	(XFS_IOLOCK_EXCL \| XFS_IOLOCK_SHARED \| XFS_ILOCK_EXCL \| \
	356	XFS_ILOCK_SHARED \| XFS_EXTENT_TOKEN_RD \| XFS_SIZE_TOKEN_RD \| \
	357	XFS_WILLLEND)
	358
	359	/*
	360	* Flags for xfs_iflush()
	361	*/
	362	#define XFS_IFLUSH_DELWRI_ELSE_SYNC 1
	363	#define XFS_IFLUSH_DELWRI_ELSE_ASYNC 2
	364	#define XFS_IFLUSH_SYNC 3
	365	#define XFS_IFLUSH_ASYNC 4
	366	#define XFS_IFLUSH_DELWRI 5
	367
1da177e4 LT	368	/*
	369	* Flags for xfs_itruncate_start().
	370	*/
	371	#define XFS_ITRUNC_DEFINITE 0x1
	372	#define XFS_ITRUNC_MAYBE 0x2
	373
1da177e4	374	#define XFS_ITOV(ip) BHV_TO_VNODE(XFS_ITOBHV(ip))
1da177e4	375	#define XFS_ITOV_NULL(ip) BHV_TO_VNODE_NULL(XFS_ITOBHV(ip))
1da177e4	376	#define XFS_ITOBHV(ip) ((struct bhv_desc *)(&((ip)->i_bhv_desc)))
a844f451 NS	377	#define XFS_BHVTOI(bhvp) ((xfs_inode_t )((char )(bhvp) - \
a844f451 NS	378	(char )&(((xfs_inode_t )0)->i_bhv_desc)))
1da177e4 LT	379	#define BHV_IS_XFS(bdp) (BHV_OPS(bdp) == &xfs_vnodeops)
	380
	381	/*
	382	* For multiple groups support: if S_ISGID bit is set in the parent
	383	* directory, group of new file is set to that of the parent, and
	384	* new subdirectory gets S_ISGID bit from parent.
	385	*/
	386	#define XFS_INHERIT_GID(pip, vfsp) \
	387	(((vfsp)->vfs_flag & VFS_GRPID) \|\| ((pip)->i_d.di_mode & S_ISGID))
	388
	389	/*
	390	* xfs_iget.c prototypes.
	391	*/
	392
	393	#define IGET_CREATE 1
	394
	395	void xfs_ihash_init(struct xfs_mount *);
	396	void xfs_ihash_free(struct xfs_mount *);
	397	void xfs_chash_init(struct xfs_mount *);
	398	void xfs_chash_free(struct xfs_mount *);
	399	xfs_inode_t xfs_inode_incore(struct xfs_mount , xfs_ino_t,
	400	struct xfs_trans *);
	401	void xfs_inode_lock_init(xfs_inode_t , struct vnode );
	402	int xfs_iget(struct xfs_mount , struct xfs_trans , xfs_ino_t,
	403	uint, uint, xfs_inode_t **, xfs_daddr_t);
	404	void xfs_iput(xfs_inode_t *, uint);
	405	void xfs_iput_new(xfs_inode_t *, uint);
	406	void xfs_ilock(xfs_inode_t *, uint);
	407	int xfs_ilock_nowait(xfs_inode_t *, uint);
	408	void xfs_iunlock(xfs_inode_t *, uint);
	409	void xfs_ilock_demote(xfs_inode_t *, uint);
	410	void xfs_iflock(xfs_inode_t *);
	411	int xfs_iflock_nowait(xfs_inode_t *);
	412	uint xfs_ilock_map_shared(xfs_inode_t *);
	413	void xfs_iunlock_map_shared(xfs_inode_t *, uint);
	414	void xfs_ifunlock(xfs_inode_t *);
	415	void xfs_ireclaim(xfs_inode_t *);
	416	int xfs_finish_reclaim(xfs_inode_t *, int, int);
	417	int xfs_finish_reclaim_all(struct xfs_mount *, int);
	418
	419	/*
	420	* xfs_inode.c prototypes.
	421	*/
1da177e4 LT	422	int xfs_itobp(struct xfs_mount , struct xfs_trans ,
	423	xfs_inode_t , xfs_dinode_t , struct xfs_buf *,
	424	xfs_daddr_t);
	425	int xfs_iread(struct xfs_mount , struct xfs_trans , xfs_ino_t,
	426	xfs_inode_t **, xfs_daddr_t);
	427	int xfs_iread_extents(struct xfs_trans , xfs_inode_t , int);
31b084ae NS	428	int xfs_ialloc(struct xfs_trans , xfs_inode_t , mode_t,
	429	xfs_nlink_t, xfs_dev_t, struct cred *, xfs_prid_t,
	430	int, struct xfs_buf *, boolean_t , xfs_inode_t **);
1da177e4 LT	431	void xfs_xlate_dinode_core(xfs_caddr_t, struct xfs_dinode_core *,
	432	int);
	433	uint xfs_ip2xflags(struct xfs_inode *);
	434	uint xfs_dic2xflags(struct xfs_dinode_core *);
	435	int xfs_ifree(struct xfs_trans , xfs_inode_t ,
	436	struct xfs_bmap_free *);
	437	void xfs_itruncate_start(xfs_inode_t *, uint, xfs_fsize_t);
	438	int xfs_itruncate_finish(struct xfs_trans *, xfs_inode_t ,
	439	xfs_fsize_t, int, int);
	440	int xfs_iunlink(struct xfs_trans , xfs_inode_t );
	441	int xfs_igrow_start(xfs_inode_t , xfs_fsize_t, struct cred );
	442	void xfs_igrow_finish(struct xfs_trans , xfs_inode_t ,
	443	xfs_fsize_t, int);
	444
	445	void xfs_idestroy_fork(xfs_inode_t *, int);
	446	void xfs_idestroy(xfs_inode_t *);
	447	void xfs_idata_realloc(xfs_inode_t *, int, int);
	448	void xfs_iextract(xfs_inode_t *);
	449	void xfs_iext_realloc(xfs_inode_t *, int, int);
	450	void xfs_iroot_realloc(xfs_inode_t *, int, int);
	451	void xfs_ipin(xfs_inode_t *);
	452	void xfs_iunpin(xfs_inode_t *);
	453	int xfs_iextents_copy(xfs_inode_t , xfs_bmbt_rec_t , int);
	454	int xfs_iflush(xfs_inode_t *, uint);
efa80278	455	void xfs_iflush_all(struct xfs_mount *);
1da177e4 LT	456	int xfs_iaccess(xfs_inode_t , mode_t, cred_t );
	457	uint xfs_iroundup(uint);
	458	void xfs_ichgtime(xfs_inode_t *, int);
	459	xfs_fsize_t xfs_file_last_byte(xfs_inode_t *);
	460	void xfs_lock_inodes(xfs_inode_t **, int, int, uint);
	461
75e17b3c CH	462	xfs_inode_t xfs_vtoi(struct vnode vp);
75e17b3c CH	463
42fe2b1f CH	464	void xfs_synchronize_atime(xfs_inode_t *);
42fe2b1f CH	465
4eea22f0 MK	466	xfs_bmbt_rec_t xfs_iext_get_ext(xfs_ifork_t , xfs_extnum_t);
	467	void xfs_iext_insert(xfs_ifork_t *, xfs_extnum_t, xfs_extnum_t,
	468	xfs_bmbt_irec_t *);
	469	void xfs_iext_add(xfs_ifork_t *, xfs_extnum_t, int);
0293ce3a	470	void xfs_iext_add_indirect_multi(xfs_ifork_t *, int, xfs_extnum_t, int);
4eea22f0 MK	471	void xfs_iext_remove(xfs_ifork_t *, xfs_extnum_t, int);
	472	void xfs_iext_remove_inline(xfs_ifork_t *, xfs_extnum_t, int);
	473	void xfs_iext_remove_direct(xfs_ifork_t *, xfs_extnum_t, int);
0293ce3a	474	void xfs_iext_remove_indirect(xfs_ifork_t *, xfs_extnum_t, int);
4eea22f0	475	void xfs_iext_realloc_direct(xfs_ifork_t *, int);
0293ce3a MK	476	void xfs_iext_realloc_indirect(xfs_ifork_t *, int);
0293ce3a MK	477	void xfs_iext_indirect_to_direct(xfs_ifork_t *);
4eea22f0 MK	478	void xfs_iext_direct_to_inline(xfs_ifork_t *, xfs_extnum_t);
	479	void xfs_iext_inline_to_direct(xfs_ifork_t *, int);
	480	void xfs_iext_destroy(xfs_ifork_t *);
8867bc9b	481	xfs_bmbt_rec_t xfs_iext_bno_to_ext(xfs_ifork_t , xfs_fileoff_t, int *);
0293ce3a MK	482	xfs_ext_irec_t xfs_iext_bno_to_irec(xfs_ifork_t , xfs_fileoff_t, int *);
	483	xfs_ext_irec_t xfs_iext_idx_to_irec(xfs_ifork_t , xfs_extnum_t , int , int);
	484	void xfs_iext_irec_init(xfs_ifork_t *);
	485	xfs_ext_irec_t xfs_iext_irec_new(xfs_ifork_t , int);
	486	void xfs_iext_irec_remove(xfs_ifork_t *, int);
	487	void xfs_iext_irec_compact(xfs_ifork_t *);
	488	void xfs_iext_irec_compact_pages(xfs_ifork_t *);
	489	void xfs_iext_irec_compact_full(xfs_ifork_t *);
	490	void xfs_iext_irec_update_extoffs(xfs_ifork_t *, int, int);
4eea22f0	491
1da177e4 LT	492	#define xfs_ipincount(ip) ((unsigned int) atomic_read(&ip->i_pincount))
	493
	494	#ifdef DEBUG
	495	void xfs_isize_check(struct xfs_mount , xfs_inode_t , xfs_fsize_t);
	496	#else /* DEBUG */
	497	#define xfs_isize_check(mp, ip, isize)
	498	#endif /* DEBUG */
	499
	500	#if defined(DEBUG)
	501	void xfs_inobp_check(struct xfs_mount , struct xfs_buf );
	502	#else
	503	#define xfs_inobp_check(mp, bp)
	504	#endif /* DEBUG */
	505
	506	extern struct kmem_zone *xfs_chashlist_zone;
	507	extern struct kmem_zone *xfs_ifork_zone;
	508	extern struct kmem_zone *xfs_inode_zone;
	509	extern struct kmem_zone *xfs_ili_zone;
	510	extern struct vnodeops xfs_vnodeops;
	511
	512	#endif /* __KERNEL__ */
	513
	514	#endif /* __XFS_INODE_H__ */