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Inode space reduction: move inode items out of line; remove i_dmevents.
Rearrange some fields to avoid padding due to alignment.
Remove redundant definition of XFS_INO_REF.

#ifndef	_XFS_INODE_H
#define	_XFS_INODE_H

#ident "$Revision: 1.88 $"

struct buf;
struct cred;
struct grio_ticket;
struct ktrace;
struct vnode;
struct xfs_bmbt_block;
struct xfs_gap;
struct xfs_inode;
struct xfs_mount;
struct xfs_trans;
struct zone;

/*
 * 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;	
	mutex_t			ih_lock;
	uint			ih_version;
} xfs_ihash_t;

#ifdef NOTYET
/*
 * The range structure is used to describe a locked range
 * within a file.  It is used in conjunction with the
 * xfs_range_lock_t defined below.
 */
typedef struct xfs_range {
	struct xfs_range	*r_forw;	/* range list pointer */
	struct xfs_range	*r_back;	/* range list pointer */
	xfs_fileoff_t		r_off;		/* start of range */
	xfs_fileoff_t		r_len;		/* length of range */
	int			r_sleepers;	/* count of sleepers */
} xfs_range_t;

/*
 * This is a structure embedded in the incore inode for
 * tracking range locks over the file.  The semaphore is
 * dynamically allocated to reduce our memory consumption.
 * XXX Semaphores are now only 32-bits -- should allocate in-line. --yohn
 */
typedef struct xfs_range_lock {
	mutex_t		r_spinlock;	/* lock to make sleeps atomic */
	sema_t		*r_sleep;	/* semaphore for sleeping on */
	xfs_range_t	*r_range_list;	/* list of locked ranges */
} xfs_range_lock_t;
#endif /* NOTYET */

/*
 * File incore extent information, present for each of data & attr forks.
 */
#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 */
		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 */
		dev_t		if_rdev;	/* dev number if special */
		uuid_t		if_uuid;	/* mount point value */
	} if_u2;
} xfs_ifork_t;

/*
 * 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.
 */
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_prevp;	/* ptr to prev i_next */
	struct xfs_mount	*i_mount;	/* fs mount struct ptr */
	struct xfs_inode	*i_mnext;	/* next inode in mount list */
	struct xfs_inode	*i_mprev;	/* ptr to prev inode */
	struct vnode		*i_vnode;	/* ptr to associated vnode */

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

	/* Inode location stuff */
	xfs_ino_t		i_ino;		/* inode number (agno/agino)*/
	daddr_t			i_blkno;	/* blkno of inode buffer */
	dev_t			i_dev;		/* dev for this inode */
	short			i_len;		/* len of inode buffer */
	short			i_boffset;	/* off of inode in buffer */

	/* Transaction and locking information. */
	struct xfs_trans	*i_transp;	/* ptr to owning transaction*/
	xfs_inode_log_item_t	*i_itemp;	/* logging information */
	mrlock_t		i_lock;		/* inode lock */
	mrlock_t		i_iolock;	/* inode IO lock */
	sema_t			i_flock;	/* inode flush lock */
	unsigned int		i_pincount;	/* inode pin count */
	sv_t			i_pinsema;	/* inode pin sema */
#ifdef NOTYET
	xfs_range_lock_t	i_range_lock;	/* range lock base */
#endif /* NOTYET */
	struct xfs_inode	**i_refcache;	/* ptr to entry in ref cache */
	struct xfs_inode	*i_release;	/* inode to unref */

	/* I/O state */
	off_t			i_next_offset;	/* seq read detector */
	off_t			i_io_offset;	/* last buf offset */
	xfs_fsize_t		i_new_size;	/* sz when write completes */
	off_t			i_write_offset;	/* start off of curr write */
	xfs_fileoff_t		i_reada_blkno;	/* next blk to start ra */
	struct xfs_gap		*i_gap_list;	/* hole list in write range */
	unsigned int		i_io_size;	/* file io buffer len */
	unsigned int		i_last_req_sz;	/* last read size */

	/* Miscellaneous state. */
	unsigned short		i_flags;	/* see defined flags below */
	unsigned short		i_update_core;	/* timestamps are dirty */
	int			i_queued_bufs;	/* count of xfsd queued bufs*/
	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 */

#ifdef DEBUG
	unsigned long		i_mapcnt;	/* count of mapped pages */

	/* Trace buffers per inode. */
	struct ktrace		*i_xtrace;	/* inode extent list trace */
	struct ktrace		*i_btrace;	/* inode bmap btree trace */
	struct ktrace		*i_rwtrace;	/* inode read/write trace */
	struct ktrace		*i_strat_trace;	/* inode strat_write trace */
#endif /* DEBUG */
} xfs_inode_t;

/*
 * 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)

/*
 * In-core inode flags.
 */
#define XFS_IGRIO	0x0001  /* inode will be used for guaranteed rate i/o */

/*
 * Per-fork incore inode flags.
 */
#define	XFS_IFINLINE	0x0001	/* Inline data is read in */
#define	XFS_IFEXTENTS	0x0002	/* All extent pointers are read in */
#define	XFS_IFBROOT	0x0004	/* i_broot points to the bmap b-tree root */

/*
 * Flags for inode locking.
 */
#define	XFS_IOLOCK_EXCL		0x01
#define	XFS_IOLOCK_SHARED	0x02
#define	XFS_ILOCK_EXCL		0x04
#define	XFS_ILOCK_SHARED	0x08
#define	XFS_IUNLOCK_NONOTIFY	0x10

/*
 * 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_iflush_all.
 */
#define	XFS_FLUSH_ALL		0x1

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

/*
 * 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 */

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

/*
 * Maximum number of extent pointers in if_u1.if_extents.
 */
#define	XFS_MAX_INCORE_EXTENTS	32768

/*
 * Maximum file size.
 * if XFS_BIG_FILES 2^63 - 1 (largest positive value of xfs_fsize_t)
 * else 2^40 - 1 (40=31+9) (might be an int holding a block #)
 * Note, we allow seeks to this offset, although you can't read or write.
 * For the not XFS_BIG_FILES case, the value could be 1 higher but we don't
 * do that, for symmetry.
 */
#if XFS_BIG_FILES
#define XFS_MAX_FILE_OFFSET	((long long)((1ULL<<63)-1ULL))
#else
#define	XFS_MAX_FILE_OFFSET	((1LL<<40)-1LL)
#endif


#define	XFS_ITOV(ip)	((struct vnode *)((ip)->i_vnode))
#define	XFS_VTOI(vp)	((xfs_inode_t *)((vp)->v_data))

/*
 * Clear out the read-ahead state in the in-core inode.
 */
#define	XFS_INODE_CLEAR_READ_AHEAD(ip)	{	\
		ip->i_next_offset = 0;		\
		ip->i_io_offset = 0;		\
		ip->i_reada_blkno = 0;		\
		ip->i_io_size = 0;		\
		ip->i_last_req_sz = 0; }

/*
 * XFS file identifier.
 */
typedef __uint32_t	xfs_fid_ino_t;
typedef struct xfs_fid {
	u_short		fid_len;       /* length of remainder */
        u_short		fid_pad;       /* padding, must be zero */
	__uint32_t	fid_gen;       /* generation number */
        xfs_fid_ino_t	fid_ino;       /* inode number */
} xfs_fid_t;

/*
 * xfs_iget.c prototypes.
 */
void		xfs_ihash_init(struct xfs_mount *);
void		xfs_ihash_free(struct xfs_mount *);
xfs_inode_t	*xfs_inode_incore(struct xfs_mount *, xfs_ino_t,
				  struct xfs_trans *);
int		xfs_iget(struct xfs_mount *, struct xfs_trans *, xfs_ino_t,
			 uint, xfs_inode_t **, daddr_t);
void		xfs_iput(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_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 *);

/*
 * xfs_inode.c prototypes.
 */
int		xfs_inotobp(struct xfs_mount *, struct xfs_trans *, xfs_ino_t,
			    xfs_dinode_t **, struct buf **);
int		xfs_iread(struct xfs_mount *, struct xfs_trans *, xfs_ino_t,
			  xfs_inode_t **, daddr_t);
int		xfs_iread_extents(struct xfs_trans *, xfs_inode_t *, int);
int		xfs_ialloc(struct xfs_trans *, xfs_inode_t *, mode_t, ushort,
		           dev_t, struct cred *, struct buf **, boolean_t *,
			   xfs_inode_t **);
#ifndef SIM
int		xfs_ifree(struct xfs_trans *, xfs_inode_t *);
int		xfs_atruncate_start(xfs_inode_t *);
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 *);
#endif	/* !SIM */
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);

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_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_32_t *, int);
int		xfs_iflush(xfs_inode_t *, uint);
int		xfs_iflush_all(struct xfs_mount *, int);
#ifdef SIM
void		xfs_iprint(xfs_inode_t *);
#endif
int		xfs_iaccess(xfs_inode_t *, mode_t, struct cred *);
uint		xfs_iroundup(uint);
void		xfs_ichgtime(xfs_inode_t *, int);
xfs_fsize_t	xfs_file_last_byte(xfs_inode_t *);

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

/*
 * xfs_vnodeops.c prototypes.
 */
int		xfs_fast_fid(struct vnode *, xfs_fid_t *);

extern int		xfs_do_fast_fid;
extern struct zone	*xfs_ifork_zone;
extern struct zone	*xfs_inode_zone;
extern struct zone	*xfs_ili_zone;

#endif	/* _XFS_INODE_H */