[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_itobp(), xfs_imap() and xfs_dilocate().
 */
#define XFS_IMAP_LOOKUP		0x1
#define XFS_IMAP_BULKSTAT	0x2

#ifdef __KERNEL__
struct bhv_desc;
struct bhv_vnode;
struct cred;
struct ktrace;
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_chashlist	*chl_prev;
	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 bhv_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, uint);
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 bhv_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;

#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
1da177e4 LT	97	/*
b12dd342	98	* Flags for xfs_itobp(), xfs_imap() and xfs_dilocate().
1da177e4	99	*/
b12dd342 NS	100	#define XFS_IMAP_LOOKUP 0x1
b12dd342 NS	101	#define XFS_IMAP_BULKSTAT 0x2
1da177e4	102
1da177e4 LT	103	#ifdef __KERNEL__
1da177e4 LT	104	struct bhv_desc;
67fcaa73	105	struct bhv_vnode;
1da177e4 LT	106	struct cred;
1da177e4 LT	107	struct ktrace;
1da177e4 LT	108	struct xfs_buf;
	109	struct xfs_bmap_free;
	110	struct xfs_bmbt_irec;
	111	struct xfs_bmbt_block;
	112	struct xfs_inode;
	113	struct xfs_inode_log_item;
	114	struct xfs_mount;
	115	struct xfs_trans;
	116	struct xfs_dquot;
	117
	118	#if defined(XFS_ILOCK_TRACE)
	119	#define XFS_ILOCK_KTRACE_SIZE 32
	120	extern ktrace_t *xfs_ilock_trace_buf;
	121	extern void xfs_ilock_trace(struct xfs_inode , int, unsigned int, inst_t );
	122	#else
	123	#define xfs_ilock_trace(i,n,f,ra)
	124	#endif
	125
1da177e4 LT	126	typedef struct dm_attrs_s {
	127	__uint32_t da_dmevmask; /* DMIG event mask */
	128	__uint16_t da_dmstate; /* DMIG state info */
	129	__uint16_t da_pad; /* DMIG extra padding */
	130	} dm_attrs_t;
	131
	132	typedef struct xfs_iocore {
	133	void io_obj; / pointer to container
	134	* inode or dcxvn structure */
	135	struct xfs_mount io_mount; / fs mount struct ptr */
	136	#ifdef DEBUG
	137	mrlock_t io_lock; / inode IO lock */
	138	mrlock_t io_iolock; / inode IO lock */
	139	#endif
	140
	141	/* I/O state */
	142	xfs_fsize_t io_new_size; /* sz when write completes */
	143
	144	/* Miscellaneous state. */
	145	unsigned int io_flags; /* IO related flags */
	146
	147	/* DMAPI state */
	148	dm_attrs_t io_dmattrs;
	149
	150	} xfs_iocore_t;
	151
	152	#define io_dmevmask io_dmattrs.da_dmevmask
	153	#define io_dmstate io_dmattrs.da_dmstate
	154
	155	#define XFS_IO_INODE(io) ((xfs_inode_t *) ((io)->io_obj))
	156	#define XFS_IO_DCXVN(io) ((dcxvn_t *) ((io)->io_obj))
	157
	158	/*
	159	* Flags in the flags field
	160	*/
	161
	162	#define XFS_IOCORE_RT 0x1
	163
	164	/*
	165	* xfs_iocore prototypes
	166	*/
	167
	168	extern void xfs_iocore_inode_init(struct xfs_inode *);
	169	extern void xfs_iocore_inode_reinit(struct xfs_inode *);
	170
	171
	172	/*
	173	* This is the type used in the xfs inode hash table.
	174	* An array of these is allocated for each mounted
	175	* file system to hash the inodes for that file system.
	176	*/
	177	typedef struct xfs_ihash {
	178	struct xfs_inode *ih_next;
	179	rwlock_t ih_lock;
	180	uint ih_version;
	181	} xfs_ihash_t;
	182
	183	#define XFS_IHASH(mp,ino) ((mp)->m_ihash + (((uint)(ino)) % (mp)->m_ihsize))
	184
	185	/*
	186	* This is the xfs inode cluster hash. This hash is used by xfs_iflush to
	187	* find inodes that share a cluster and can be flushed to disk at the same
	188	* time.
	189	*/
190	typedef struct xfs_chashlist {
191	struct xfs_chashlist *chl_next;
1fc5d959	192	struct xfs_chashlist *chl_prev;
1da177e4 LT	193	struct xfs_inode *chl_ip;
	194	xfs_daddr_t chl_blkno; /* starting block number of
	195	* the cluster */
	196	struct xfs_buf chl_buf; / the inode buffer */
	197	} xfs_chashlist_t;
	198
	199	typedef struct xfs_chash {
	200	xfs_chashlist_t *ch_list;
	201	lock_t ch_lock;
	202	} xfs_chash_t;
	203
	204	#define XFS_CHASH(mp,blk) ((mp)->m_chash + (((uint)blk) % (mp)->m_chsize))
	205
	206
	207	/*
	208	* This is the xfs in-core inode structure.
	209	* Most of the on-disk inode is embedded in the i_d field.
	210	*
	211	* The extent pointers/inline file space, however, are managed
	212	* separately. The memory for this information is pointed to by
	213	* the if_u1 unions depending on the type of the data.
	214	* This is used to linearize the array of extents for fast in-core
	215	* access. This is used until the file's number of extents
	216	* surpasses XFS_MAX_INCORE_EXTENTS, at which point all extent pointers
	217	* are accessed through the buffer cache.
	218	*
	219	* Other state kept in the in-core inode is used for identification,
	220	* locking, transactional updating, etc of the inode.
	221	*
	222	* Generally, we do not want to hold the i_rlock while holding the
	223	* i_ilock. Hierarchy is i_iolock followed by i_rlock.
	224	*
	225	* xfs_iptr_t contains all the inode fields upto and including the
	226	* i_mnext and i_mprev fields, it is used as a marker in the inode
	227	* chain off the mount structure by xfs_sync calls.
	228	*/
	229
	230	typedef struct {
	231	struct xfs_ihash ip_hash; / pointer to hash header */
	232	struct xfs_inode ip_next; / inode hash link forw */
	233	struct xfs_inode ip_mnext; / next inode in mount list */
	234	struct xfs_inode ip_mprev; / ptr to prev inode */
	235	struct xfs_inode *ip_prevp; / ptr to prev i_next */
	236	struct xfs_mount ip_mount; / fs mount struct ptr */
	237	} xfs_iptr_t;
	238
	239	typedef struct xfs_inode {
	240	/* Inode linking and identification information. */
	241	struct xfs_ihash i_hash; / pointer to hash header */
	242	struct xfs_inode i_next; / inode hash link forw */
	243	struct xfs_inode i_mnext; / next inode in mount list */
	244	struct xfs_inode i_mprev; / ptr to prev inode */
	245	struct xfs_inode *i_prevp; / ptr to prev i_next */
	246	struct xfs_mount i_mount; / fs mount struct ptr */
	247	struct list_head i_reclaim; /* reclaim list */
	248	struct bhv_desc i_bhv_desc; /* inode behavior descriptor*/
	249	struct xfs_dquot i_udquot; / user dquot */
	250	struct xfs_dquot i_gdquot; / group dquot */
	251
	252	/* Inode location stuff */
	253	xfs_ino_t i_ino; /* inode number (agno/agino)*/
	254	xfs_daddr_t i_blkno; /* blkno of inode buffer */
	255	ushort i_len; /* len of inode buffer */
	256	ushort i_boffset; /* off of inode in buffer */
257
258	/* Extent information. */
259	xfs_ifork_t i_afp; / attribute fork pointer */
260	xfs_ifork_t i_df; /* data fork */
261
262	/* Transaction and locking information. */
263	struct xfs_trans i_transp; / ptr to owning transaction*/
264	struct xfs_inode_log_item i_itemp; / logging information */
265	mrlock_t i_lock; /* inode lock */
266	mrlock_t i_iolock; /* inode IO lock */
267	sema_t i_flock; /* inode flush lock */
268	atomic_t i_pincount; /* inode pin count */
269	wait_queue_head_t i_ipin_wait; /* inode pinning wait queue */
270	#ifdef HAVE_REFCACHE
271	struct xfs_inode *i_refcache; / ptr to entry in ref cache */
272	struct xfs_inode i_release; / inode to unref */
273	#endif
274	/* I/O state */
275	xfs_iocore_t i_iocore; /* I/O core */
276
277	/* Miscellaneous state. */
278	unsigned short i_flags; /* see defined flags below */
279	unsigned char i_update_core; /* timestamps/size is dirty */
280	unsigned char i_update_size; /* di_size field is dirty */
281	unsigned int i_gen; /* generation count */
282	unsigned int i_delayed_blks; /* count of delay alloc blks */
283
284	xfs_dinode_core_t i_d; /* most of ondisk inode */
285	xfs_chashlist_t i_chash; / cluster hash list header */
286	struct xfs_inode i_cnext; / cluster hash link forward */
287	struct xfs_inode i_cprev; / cluster hash link backward */
288
289	/* Trace buffers per inode. */
290	#ifdef XFS_BMAP_TRACE
291	struct ktrace i_xtrace; / inode extent list trace */
292	#endif
293	#ifdef XFS_BMBT_TRACE
294	struct ktrace i_btrace; / inode bmap btree trace */
295	#endif
296	#ifdef XFS_RW_TRACE
297	struct ktrace i_rwtrace; / inode read/write trace */
298	#endif
299	#ifdef XFS_ILOCK_TRACE
300	struct ktrace i_lock_trace; / inode lock/unlock trace */
301	#endif
302	#ifdef XFS_DIR2_TRACE
303	struct ktrace i_dir_trace; / inode directory trace */
304	#endif
305	} xfs_inode_t;
306
307	#endif /* __KERNEL__ */
308
309
310	/*
311	* Fork handling.
312	*/
a844f451 NS	313	#define XFS_IFORK_PTR(ip,w) \
a844f451 NS	314	((w) == XFS_DATA_FORK ? &(ip)->i_df : (ip)->i_afp)
1da177e4	315	#define XFS_IFORK_Q(ip) XFS_CFORK_Q(&(ip)->i_d)
1da177e4	316	#define XFS_IFORK_DSIZE(ip) XFS_CFORK_DSIZE(&ip->i_d, ip->i_mount)
1da177e4	317	#define XFS_IFORK_ASIZE(ip) XFS_CFORK_ASIZE(&ip->i_d, ip->i_mount)
1da177e4	318	#define XFS_IFORK_SIZE(ip,w) XFS_CFORK_SIZE(&ip->i_d, ip->i_mount, w)
1da177e4	319	#define XFS_IFORK_FORMAT(ip,w) XFS_CFORK_FORMAT(&ip->i_d, w)
1da177e4	320	#define XFS_IFORK_FMT_SET(ip,w,n) XFS_CFORK_FMT_SET(&ip->i_d, w, n)
1da177e4	321	#define XFS_IFORK_NEXTENTS(ip,w) XFS_CFORK_NEXTENTS(&ip->i_d, w)
1da177e4	322	#define XFS_IFORK_NEXT_SET(ip,w,n) XFS_CFORK_NEXT_SET(&ip->i_d, w, n)
1da177e4 LT	323
	324
	325	#ifdef __KERNEL__
	326
	327	/*
	328	* In-core inode flags.
	329	*/
	330	#define XFS_IGRIO 0x0001 /* inode used for guaranteed rate i/o */
	331	#define XFS_IUIOSZ 0x0002 /* inode i/o sizes have been explicitly set */
	332	#define XFS_IQUIESCE 0x0004 /* we have started quiescing for this inode */
	333	#define XFS_IRECLAIM 0x0008 /* we have started reclaiming this inode */
	334	#define XFS_ISTALE 0x0010 /* inode has been staled */
	335	#define XFS_IRECLAIMABLE 0x0020 /* inode can be reclaimed */
	336	#define XFS_INEW 0x0040
	337
	338	/*
	339	* Flags for inode locking.
	340	*/
	341	#define XFS_IOLOCK_EXCL 0x001
	342	#define XFS_IOLOCK_SHARED 0x002
	343	#define XFS_ILOCK_EXCL 0x004
	344	#define XFS_ILOCK_SHARED 0x008
	345	#define XFS_IUNLOCK_NONOTIFY 0x010
30dab21a	346	/* XFS_IOLOCK_NESTED 0x020 */
1da177e4 LT	347	#define XFS_EXTENT_TOKEN_RD 0x040
	348	#define XFS_SIZE_TOKEN_RD 0x080
	349	#define XFS_EXTSIZE_RD (XFS_EXTENT_TOKEN_RD\|XFS_SIZE_TOKEN_RD)
	350	#define XFS_WILLLEND 0x100 /* Always acquire tokens for lending */
	351	#define XFS_EXTENT_TOKEN_WR (XFS_EXTENT_TOKEN_RD \| XFS_WILLLEND)
	352	#define XFS_SIZE_TOKEN_WR (XFS_SIZE_TOKEN_RD \| XFS_WILLLEND)
	353	#define XFS_EXTSIZE_WR (XFS_EXTSIZE_RD \| XFS_WILLLEND)
30dab21a	354	/* XFS_SIZE_TOKEN_WANT 0x200 */
1da177e4 LT	355
	356	#define XFS_LOCK_MASK \
	357	(XFS_IOLOCK_EXCL \| XFS_IOLOCK_SHARED \| XFS_ILOCK_EXCL \| \
	358	XFS_ILOCK_SHARED \| XFS_EXTENT_TOKEN_RD \| XFS_SIZE_TOKEN_RD \| \
	359	XFS_WILLLEND)
	360
	361	/*
	362	* Flags for xfs_iflush()
	363	*/
	364	#define XFS_IFLUSH_DELWRI_ELSE_SYNC 1
	365	#define XFS_IFLUSH_DELWRI_ELSE_ASYNC 2
	366	#define XFS_IFLUSH_SYNC 3
	367	#define XFS_IFLUSH_ASYNC 4
	368	#define XFS_IFLUSH_DELWRI 5
	369
1da177e4 LT	370	/*
	371	* Flags for xfs_itruncate_start().
	372	*/
	373	#define XFS_ITRUNC_DEFINITE 0x1
	374	#define XFS_ITRUNC_MAYBE 0x2
	375
1da177e4	376	#define XFS_ITOV(ip) BHV_TO_VNODE(XFS_ITOBHV(ip))
1da177e4	377	#define XFS_ITOV_NULL(ip) BHV_TO_VNODE_NULL(XFS_ITOBHV(ip))
1da177e4	378	#define XFS_ITOBHV(ip) ((struct bhv_desc *)(&((ip)->i_bhv_desc)))
a844f451 NS	379	#define XFS_BHVTOI(bhvp) ((xfs_inode_t )((char )(bhvp) - \
a844f451 NS	380	(char )&(((xfs_inode_t )0)->i_bhv_desc)))
1da177e4 LT	381	#define BHV_IS_XFS(bdp) (BHV_OPS(bdp) == &xfs_vnodeops)
	382
	383	/*
	384	* For multiple groups support: if S_ISGID bit is set in the parent
	385	* directory, group of new file is set to that of the parent, and
	386	* new subdirectory gets S_ISGID bit from parent.
	387	*/
	388	#define XFS_INHERIT_GID(pip, vfsp) \
	389	(((vfsp)->vfs_flag & VFS_GRPID) \|\| ((pip)->i_d.di_mode & S_ISGID))
	390
	391	/*
	392	* xfs_iget.c prototypes.
	393	*/
	394
	395	#define IGET_CREATE 1
	396
	397	void xfs_ihash_init(struct xfs_mount *);
	398	void xfs_ihash_free(struct xfs_mount *);
	399	void xfs_chash_init(struct xfs_mount *);
	400	void xfs_chash_free(struct xfs_mount *);
	401	xfs_inode_t xfs_inode_incore(struct xfs_mount , xfs_ino_t,
	402	struct xfs_trans *);
67fcaa73	403	void xfs_inode_lock_init(xfs_inode_t , struct bhv_vnode );
1da177e4 LT	404	int xfs_iget(struct xfs_mount , struct xfs_trans , xfs_ino_t,
	405	uint, uint, xfs_inode_t **, xfs_daddr_t);
	406	void xfs_iput(xfs_inode_t *, uint);
	407	void xfs_iput_new(xfs_inode_t *, uint);
	408	void xfs_ilock(xfs_inode_t *, uint);
	409	int xfs_ilock_nowait(xfs_inode_t *, uint);
	410	void xfs_iunlock(xfs_inode_t *, uint);
	411	void xfs_ilock_demote(xfs_inode_t *, uint);
	412	void xfs_iflock(xfs_inode_t *);
	413	int xfs_iflock_nowait(xfs_inode_t *);
	414	uint xfs_ilock_map_shared(xfs_inode_t *);
	415	void xfs_iunlock_map_shared(xfs_inode_t *, uint);
	416	void xfs_ifunlock(xfs_inode_t *);
	417	void xfs_ireclaim(xfs_inode_t *);
	418	int xfs_finish_reclaim(xfs_inode_t *, int, int);
	419	int xfs_finish_reclaim_all(struct xfs_mount *, int);
	420
	421	/*
	422	* xfs_inode.c prototypes.
	423	*/
1da177e4 LT	424	int xfs_itobp(struct xfs_mount , struct xfs_trans ,
1da177e4 LT	425	xfs_inode_t , xfs_dinode_t , struct xfs_buf *,
b12dd342	426	xfs_daddr_t, uint);
1da177e4 LT	427	int xfs_iread(struct xfs_mount , struct xfs_trans , xfs_ino_t,
	428	xfs_inode_t **, xfs_daddr_t);
	429	int xfs_iread_extents(struct xfs_trans , xfs_inode_t , int);
31b084ae NS	430	int xfs_ialloc(struct xfs_trans , xfs_inode_t , mode_t,
	431	xfs_nlink_t, xfs_dev_t, struct cred *, xfs_prid_t,
	432	int, struct xfs_buf *, boolean_t , xfs_inode_t **);
1da177e4 LT	433	void xfs_xlate_dinode_core(xfs_caddr_t, struct xfs_dinode_core *,
	434	int);
	435	uint xfs_ip2xflags(struct xfs_inode *);
	436	uint xfs_dic2xflags(struct xfs_dinode_core *);
	437	int xfs_ifree(struct xfs_trans , xfs_inode_t ,
	438	struct xfs_bmap_free *);
	439	void xfs_itruncate_start(xfs_inode_t *, uint, xfs_fsize_t);
	440	int xfs_itruncate_finish(struct xfs_trans *, xfs_inode_t ,
	441	xfs_fsize_t, int, int);
	442	int xfs_iunlink(struct xfs_trans , xfs_inode_t );
	443	int xfs_igrow_start(xfs_inode_t , xfs_fsize_t, struct cred );
	444	void xfs_igrow_finish(struct xfs_trans , xfs_inode_t ,
	445	xfs_fsize_t, int);
	446
	447	void xfs_idestroy_fork(xfs_inode_t *, int);
	448	void xfs_idestroy(xfs_inode_t *);
	449	void xfs_idata_realloc(xfs_inode_t *, int, int);
	450	void xfs_iextract(xfs_inode_t *);
	451	void xfs_iext_realloc(xfs_inode_t *, int, int);
	452	void xfs_iroot_realloc(xfs_inode_t *, int, int);
	453	void xfs_ipin(xfs_inode_t *);
	454	void xfs_iunpin(xfs_inode_t *);
	455	int xfs_iextents_copy(xfs_inode_t , xfs_bmbt_rec_t , int);
	456	int xfs_iflush(xfs_inode_t *, uint);
efa80278	457	void xfs_iflush_all(struct xfs_mount *);
1da177e4 LT	458	int xfs_iaccess(xfs_inode_t , mode_t, cred_t );
	459	uint xfs_iroundup(uint);
	460	void xfs_ichgtime(xfs_inode_t *, int);
	461	xfs_fsize_t xfs_file_last_byte(xfs_inode_t *);
	462	void xfs_lock_inodes(xfs_inode_t **, int, int, uint);
	463
67fcaa73	464	xfs_inode_t xfs_vtoi(struct bhv_vnode vp);
75e17b3c	465
42fe2b1f CH	466	void xfs_synchronize_atime(xfs_inode_t *);
42fe2b1f CH	467
4eea22f0 MK	468	xfs_bmbt_rec_t xfs_iext_get_ext(xfs_ifork_t , xfs_extnum_t);
	469	void xfs_iext_insert(xfs_ifork_t *, xfs_extnum_t, xfs_extnum_t,
	470	xfs_bmbt_irec_t *);
	471	void xfs_iext_add(xfs_ifork_t *, xfs_extnum_t, int);
0293ce3a	472	void xfs_iext_add_indirect_multi(xfs_ifork_t *, int, xfs_extnum_t, int);
4eea22f0 MK	473	void xfs_iext_remove(xfs_ifork_t *, xfs_extnum_t, int);
	474	void xfs_iext_remove_inline(xfs_ifork_t *, xfs_extnum_t, int);
	475	void xfs_iext_remove_direct(xfs_ifork_t *, xfs_extnum_t, int);
0293ce3a	476	void xfs_iext_remove_indirect(xfs_ifork_t *, xfs_extnum_t, int);
4eea22f0	477	void xfs_iext_realloc_direct(xfs_ifork_t *, int);
0293ce3a MK	478	void xfs_iext_realloc_indirect(xfs_ifork_t *, int);
0293ce3a MK	479	void xfs_iext_indirect_to_direct(xfs_ifork_t *);
4eea22f0 MK	480	void xfs_iext_direct_to_inline(xfs_ifork_t *, xfs_extnum_t);
	481	void xfs_iext_inline_to_direct(xfs_ifork_t *, int);
	482	void xfs_iext_destroy(xfs_ifork_t *);
8867bc9b	483	xfs_bmbt_rec_t xfs_iext_bno_to_ext(xfs_ifork_t , xfs_fileoff_t, int *);
0293ce3a MK	484	xfs_ext_irec_t xfs_iext_bno_to_irec(xfs_ifork_t , xfs_fileoff_t, int *);
	485	xfs_ext_irec_t xfs_iext_idx_to_irec(xfs_ifork_t , xfs_extnum_t , int , int);
	486	void xfs_iext_irec_init(xfs_ifork_t *);
	487	xfs_ext_irec_t xfs_iext_irec_new(xfs_ifork_t , int);
	488	void xfs_iext_irec_remove(xfs_ifork_t *, int);
	489	void xfs_iext_irec_compact(xfs_ifork_t *);
	490	void xfs_iext_irec_compact_pages(xfs_ifork_t *);
	491	void xfs_iext_irec_compact_full(xfs_ifork_t *);
	492	void xfs_iext_irec_update_extoffs(xfs_ifork_t *, int, int);
4eea22f0	493
1da177e4 LT	494	#define xfs_ipincount(ip) ((unsigned int) atomic_read(&ip->i_pincount))
	495
	496	#ifdef DEBUG
	497	void xfs_isize_check(struct xfs_mount , xfs_inode_t , xfs_fsize_t);
	498	#else /* DEBUG */
	499	#define xfs_isize_check(mp, ip, isize)
	500	#endif /* DEBUG */
	501
	502	#if defined(DEBUG)
	503	void xfs_inobp_check(struct xfs_mount , struct xfs_buf );
	504	#else
	505	#define xfs_inobp_check(mp, bp)
	506	#endif /* DEBUG */
	507
	508	extern struct kmem_zone *xfs_chashlist_zone;
	509	extern struct kmem_zone *xfs_ifork_zone;
	510	extern struct kmem_zone *xfs_inode_zone;
	511	extern struct kmem_zone *xfs_ili_zone;
1da177e4 LT	512
	513	#endif /* __KERNEL__ */
	514
	515	#endif /* __XFS_INODE_H__ */