[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

/*
 * 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 */
		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	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 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


#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);

#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
1da177e4 LT	27	/*
	28	* File incore extent information, present for each of data & attr forks.
	29	*/
	30	#define XFS_INLINE_EXTS 2
	31	#define XFS_INLINE_DATA 32
	32	typedef struct xfs_ifork {
	33	int if_bytes; /* bytes in if_u1 */
	34	int if_real_bytes; /* bytes allocated in if_u1 */
	35	xfs_bmbt_block_t if_broot; / file's incore btree root */
	36	short if_broot_bytes; /* bytes allocated for root */
	37	unsigned char if_flags; /* per-fork flags */
	38	unsigned char if_ext_max; /* max # of extent records */
	39	xfs_extnum_t if_lastex; /* last if_extents used */
	40	union {
	41	xfs_bmbt_rec_t if_extents; / linear map file exts */
	42	char if_data; / inline file data */
	43	} if_u1;
	44	union {
	45	xfs_bmbt_rec_t if_inline_ext[XFS_INLINE_EXTS];
	46	/* very small file extents */
	47	char if_inline_data[XFS_INLINE_DATA];
	48	/* very small file data */
	49	xfs_dev_t if_rdev; /* dev number if special */
	50	uuid_t if_uuid; /* mount point value */
	51	} if_u2;
	52	} xfs_ifork_t;
	53
	54	/*
	55	* Flags for xfs_ichgtime().
	56	*/
	57	#define XFS_ICHGTIME_MOD 0x1 /* data fork modification timestamp */
	58	#define XFS_ICHGTIME_ACC 0x2 /* data fork access timestamp */
	59	#define XFS_ICHGTIME_CHG 0x4 /* inode field change timestamp */
	60
	61	/*
	62	* Per-fork incore inode flags.
	63	*/
	64	#define XFS_IFINLINE 0x0001 /* Inline data is read in */
	65	#define XFS_IFEXTENTS 0x0002 /* All extent pointers are read in */
	66	#define XFS_IFBROOT 0x0004 /* i_broot points to the bmap b-tree root */
	67
	68	/*
	69	* Flags for xfs_imap() and xfs_dilocate().
	70	*/
	71	#define XFS_IMAP_LOOKUP 0x1
	72
	73	/*
	74	* Maximum number of extent pointers in if_u1.if_extents.
	75	*/
	76	#define XFS_MAX_INCORE_EXTENTS 32768
	77
	78
	79	#ifdef __KERNEL__
	80	struct bhv_desc;
	81	struct cred;
	82	struct ktrace;
	83	struct vnode;
	84	struct xfs_buf;
	85	struct xfs_bmap_free;
	86	struct xfs_bmbt_irec;
	87	struct xfs_bmbt_block;
	88	struct xfs_inode;
	89	struct xfs_inode_log_item;
	90	struct xfs_mount;
91	struct xfs_trans;
92	struct xfs_dquot;
93
94	#if defined(XFS_ILOCK_TRACE)
95	#define XFS_ILOCK_KTRACE_SIZE 32
96	extern ktrace_t *xfs_ilock_trace_buf;
97	extern void xfs_ilock_trace(struct xfs_inode , int, unsigned int, inst_t );
98	#else
99	#define xfs_ilock_trace(i,n,f,ra)
100	#endif
101
1da177e4 LT	102	typedef struct dm_attrs_s {
	103	__uint32_t da_dmevmask; /* DMIG event mask */
	104	__uint16_t da_dmstate; /* DMIG state info */
	105	__uint16_t da_pad; /* DMIG extra padding */
	106	} dm_attrs_t;
	107
	108	typedef struct xfs_iocore {
	109	void io_obj; / pointer to container
	110	* inode or dcxvn structure */
	111	struct xfs_mount io_mount; / fs mount struct ptr */
	112	#ifdef DEBUG
	113	mrlock_t io_lock; / inode IO lock */
	114	mrlock_t io_iolock; / inode IO lock */
	115	#endif
	116
	117	/* I/O state */
	118	xfs_fsize_t io_new_size; /* sz when write completes */
	119
	120	/* Miscellaneous state. */
	121	unsigned int io_flags; /* IO related flags */
	122
	123	/* DMAPI state */
	124	dm_attrs_t io_dmattrs;
	125
	126	} xfs_iocore_t;
	127
	128	#define io_dmevmask io_dmattrs.da_dmevmask
	129	#define io_dmstate io_dmattrs.da_dmstate
	130
	131	#define XFS_IO_INODE(io) ((xfs_inode_t *) ((io)->io_obj))
	132	#define XFS_IO_DCXVN(io) ((dcxvn_t *) ((io)->io_obj))
	133
	134	/*
	135	* Flags in the flags field
	136	*/
	137
	138	#define XFS_IOCORE_RT 0x1
	139
	140	/*
	141	* xfs_iocore prototypes
	142	*/
	143
	144	extern void xfs_iocore_inode_init(struct xfs_inode *);
	145	extern void xfs_iocore_inode_reinit(struct xfs_inode *);
	146
	147
	148	/*
	149	* This is the type used in the xfs inode hash table.
	150	* An array of these is allocated for each mounted
	151	* file system to hash the inodes for that file system.
	152	*/
	153	typedef struct xfs_ihash {
	154	struct xfs_inode *ih_next;
	155	rwlock_t ih_lock;
	156	uint ih_version;
	157	} xfs_ihash_t;
	158
	159	#define XFS_IHASH(mp,ino) ((mp)->m_ihash + (((uint)(ino)) % (mp)->m_ihsize))
	160
	161	/*
	162	* This is the xfs inode cluster hash. This hash is used by xfs_iflush to
	163	* find inodes that share a cluster and can be flushed to disk at the same
	164	* time.
	165	*/
166	typedef struct xfs_chashlist {
167	struct xfs_chashlist *chl_next;
168	struct xfs_inode *chl_ip;
169	xfs_daddr_t chl_blkno; /* starting block number of
170	* the cluster */
171	struct xfs_buf chl_buf; / the inode buffer */
172	} xfs_chashlist_t;
173
174	typedef struct xfs_chash {
175	xfs_chashlist_t *ch_list;
176	lock_t ch_lock;
177	} xfs_chash_t;
178
179	#define XFS_CHASH(mp,blk) ((mp)->m_chash + (((uint)blk) % (mp)->m_chsize))
180
181
182	/*
183	* This is the xfs in-core inode structure.
184	* Most of the on-disk inode is embedded in the i_d field.
185	*
186	* The extent pointers/inline file space, however, are managed
187	* separately. The memory for this information is pointed to by
188	* the if_u1 unions depending on the type of the data.
189	* This is used to linearize the array of extents for fast in-core
190	* access. This is used until the file's number of extents
191	* surpasses XFS_MAX_INCORE_EXTENTS, at which point all extent pointers
192	* are accessed through the buffer cache.
193	*
194	* Other state kept in the in-core inode is used for identification,
195	* locking, transactional updating, etc of the inode.
196	*
197	* Generally, we do not want to hold the i_rlock while holding the
198	* i_ilock. Hierarchy is i_iolock followed by i_rlock.
199	*
200	* xfs_iptr_t contains all the inode fields upto and including the
201	* i_mnext and i_mprev fields, it is used as a marker in the inode
202	* chain off the mount structure by xfs_sync calls.
203	*/
204
205	typedef struct {
206	struct xfs_ihash ip_hash; / pointer to hash header */
207	struct xfs_inode ip_next; / inode hash link forw */
208	struct xfs_inode ip_mnext; / next inode in mount list */
209	struct xfs_inode ip_mprev; / ptr to prev inode */
210	struct xfs_inode *ip_prevp; / ptr to prev i_next */
211	struct xfs_mount ip_mount; / fs mount struct ptr */
212	} xfs_iptr_t;
213
214	typedef struct xfs_inode {
215	/* Inode linking and identification information. */
216	struct xfs_ihash i_hash; / pointer to hash header */
217	struct xfs_inode i_next; / inode hash link forw */
218	struct xfs_inode i_mnext; / next inode in mount list */
219	struct xfs_inode i_mprev; / ptr to prev inode */
220	struct xfs_inode *i_prevp; / ptr to prev i_next */
221	struct xfs_mount i_mount; / fs mount struct ptr */
222	struct list_head i_reclaim; /* reclaim list */
223	struct bhv_desc i_bhv_desc; /* inode behavior descriptor*/
224	struct xfs_dquot i_udquot; / user dquot */
225	struct xfs_dquot i_gdquot; / group dquot */
226
227	/* Inode location stuff */
228	xfs_ino_t i_ino; /* inode number (agno/agino)*/
229	xfs_daddr_t i_blkno; /* blkno of inode buffer */
230	ushort i_len; /* len of inode buffer */
231	ushort i_boffset; /* off of inode in buffer */
232
233	/* Extent information. */
234	xfs_ifork_t i_afp; / attribute fork pointer */
235	xfs_ifork_t i_df; /* data fork */
236
237	/* Transaction and locking information. */
238	struct xfs_trans i_transp; / ptr to owning transaction*/
239	struct xfs_inode_log_item i_itemp; / logging information */
240	mrlock_t i_lock; /* inode lock */
241	mrlock_t i_iolock; /* inode IO lock */
242	sema_t i_flock; /* inode flush lock */
243	atomic_t i_pincount; /* inode pin count */
244	wait_queue_head_t i_ipin_wait; /* inode pinning wait queue */
245	#ifdef HAVE_REFCACHE
246	struct xfs_inode *i_refcache; / ptr to entry in ref cache */
247	struct xfs_inode i_release; / inode to unref */
248	#endif
249	/* I/O state */
250	xfs_iocore_t i_iocore; /* I/O core */
251
252	/* Miscellaneous state. */
253	unsigned short i_flags; /* see defined flags below */
254	unsigned char i_update_core; /* timestamps/size is dirty */
255	unsigned char i_update_size; /* di_size field is dirty */
256	unsigned int i_gen; /* generation count */
257	unsigned int i_delayed_blks; /* count of delay alloc blks */
258
259	xfs_dinode_core_t i_d; /* most of ondisk inode */
260	xfs_chashlist_t i_chash; / cluster hash list header */
261	struct xfs_inode i_cnext; / cluster hash link forward */
262	struct xfs_inode i_cprev; / cluster hash link backward */
263
264	/* Trace buffers per inode. */
265	#ifdef XFS_BMAP_TRACE
266	struct ktrace i_xtrace; / inode extent list trace */
267	#endif
268	#ifdef XFS_BMBT_TRACE
269	struct ktrace i_btrace; / inode bmap btree trace */
270	#endif
271	#ifdef XFS_RW_TRACE
272	struct ktrace i_rwtrace; / inode read/write trace */
273	#endif
274	#ifdef XFS_ILOCK_TRACE
275	struct ktrace i_lock_trace; / inode lock/unlock trace */
276	#endif
277	#ifdef XFS_DIR2_TRACE
278	struct ktrace i_dir_trace; / inode directory trace */
279	#endif
280	} xfs_inode_t;
281
282	#endif /* __KERNEL__ */
283
284
285	/*
286	* Fork handling.
287	*/
a844f451 NS	288	#define XFS_IFORK_PTR(ip,w) \
a844f451 NS	289	((w) == XFS_DATA_FORK ? &(ip)->i_df : (ip)->i_afp)
1da177e4	290	#define XFS_IFORK_Q(ip) XFS_CFORK_Q(&(ip)->i_d)
1da177e4	291	#define XFS_IFORK_DSIZE(ip) XFS_CFORK_DSIZE(&ip->i_d, ip->i_mount)
1da177e4	292	#define XFS_IFORK_ASIZE(ip) XFS_CFORK_ASIZE(&ip->i_d, ip->i_mount)
1da177e4	293	#define XFS_IFORK_SIZE(ip,w) XFS_CFORK_SIZE(&ip->i_d, ip->i_mount, w)
1da177e4	294	#define XFS_IFORK_FORMAT(ip,w) XFS_CFORK_FORMAT(&ip->i_d, w)
1da177e4	295	#define XFS_IFORK_FMT_SET(ip,w,n) XFS_CFORK_FMT_SET(&ip->i_d, w, n)
1da177e4	296	#define XFS_IFORK_NEXTENTS(ip,w) XFS_CFORK_NEXTENTS(&ip->i_d, w)
1da177e4	297	#define XFS_IFORK_NEXT_SET(ip,w,n) XFS_CFORK_NEXT_SET(&ip->i_d, w, n)
1da177e4 LT	298
	299
	300	#ifdef __KERNEL__
	301
	302	/*
	303	* In-core inode flags.
	304	*/
	305	#define XFS_IGRIO 0x0001 /* inode used for guaranteed rate i/o */
	306	#define XFS_IUIOSZ 0x0002 /* inode i/o sizes have been explicitly set */
	307	#define XFS_IQUIESCE 0x0004 /* we have started quiescing for this inode */
	308	#define XFS_IRECLAIM 0x0008 /* we have started reclaiming this inode */
	309	#define XFS_ISTALE 0x0010 /* inode has been staled */
	310	#define XFS_IRECLAIMABLE 0x0020 /* inode can be reclaimed */
	311	#define XFS_INEW 0x0040
	312
	313	/*
	314	* Flags for inode locking.
	315	*/
	316	#define XFS_IOLOCK_EXCL 0x001
	317	#define XFS_IOLOCK_SHARED 0x002
	318	#define XFS_ILOCK_EXCL 0x004
	319	#define XFS_ILOCK_SHARED 0x008
	320	#define XFS_IUNLOCK_NONOTIFY 0x010
30dab21a	321	/* XFS_IOLOCK_NESTED 0x020 */
1da177e4 LT	322	#define XFS_EXTENT_TOKEN_RD 0x040
	323	#define XFS_SIZE_TOKEN_RD 0x080
	324	#define XFS_EXTSIZE_RD (XFS_EXTENT_TOKEN_RD\|XFS_SIZE_TOKEN_RD)
	325	#define XFS_WILLLEND 0x100 /* Always acquire tokens for lending */
	326	#define XFS_EXTENT_TOKEN_WR (XFS_EXTENT_TOKEN_RD \| XFS_WILLLEND)
	327	#define XFS_SIZE_TOKEN_WR (XFS_SIZE_TOKEN_RD \| XFS_WILLLEND)
	328	#define XFS_EXTSIZE_WR (XFS_EXTSIZE_RD \| XFS_WILLLEND)
30dab21a	329	/* XFS_SIZE_TOKEN_WANT 0x200 */
1da177e4 LT	330
	331	#define XFS_LOCK_MASK \
	332	(XFS_IOLOCK_EXCL \| XFS_IOLOCK_SHARED \| XFS_ILOCK_EXCL \| \
	333	XFS_ILOCK_SHARED \| XFS_EXTENT_TOKEN_RD \| XFS_SIZE_TOKEN_RD \| \
	334	XFS_WILLLEND)
	335
	336	/*
	337	* Flags for xfs_iflush()
	338	*/
	339	#define XFS_IFLUSH_DELWRI_ELSE_SYNC 1
	340	#define XFS_IFLUSH_DELWRI_ELSE_ASYNC 2
	341	#define XFS_IFLUSH_SYNC 3
	342	#define XFS_IFLUSH_ASYNC 4
	343	#define XFS_IFLUSH_DELWRI 5
	344
1da177e4 LT	345	/*
	346	* Flags for xfs_itruncate_start().
	347	*/
	348	#define XFS_ITRUNC_DEFINITE 0x1
	349	#define XFS_ITRUNC_MAYBE 0x2
	350
1da177e4	351	#define XFS_ITOV(ip) BHV_TO_VNODE(XFS_ITOBHV(ip))
1da177e4	352	#define XFS_ITOV_NULL(ip) BHV_TO_VNODE_NULL(XFS_ITOBHV(ip))
1da177e4	353	#define XFS_ITOBHV(ip) ((struct bhv_desc *)(&((ip)->i_bhv_desc)))
a844f451 NS	354	#define XFS_BHVTOI(bhvp) ((xfs_inode_t )((char )(bhvp) - \
a844f451 NS	355	(char )&(((xfs_inode_t )0)->i_bhv_desc)))
1da177e4 LT	356	#define BHV_IS_XFS(bdp) (BHV_OPS(bdp) == &xfs_vnodeops)
	357
	358	/*
	359	* For multiple groups support: if S_ISGID bit is set in the parent
	360	* directory, group of new file is set to that of the parent, and
	361	* new subdirectory gets S_ISGID bit from parent.
	362	*/
	363	#define XFS_INHERIT_GID(pip, vfsp) \
	364	(((vfsp)->vfs_flag & VFS_GRPID) \|\| ((pip)->i_d.di_mode & S_ISGID))
	365
	366	/*
	367	* xfs_iget.c prototypes.
	368	*/
	369
	370	#define IGET_CREATE 1
	371
	372	void xfs_ihash_init(struct xfs_mount *);
	373	void xfs_ihash_free(struct xfs_mount *);
	374	void xfs_chash_init(struct xfs_mount *);
	375	void xfs_chash_free(struct xfs_mount *);
	376	xfs_inode_t xfs_inode_incore(struct xfs_mount , xfs_ino_t,
	377	struct xfs_trans *);
	378	void xfs_inode_lock_init(xfs_inode_t , struct vnode );
	379	int xfs_iget(struct xfs_mount , struct xfs_trans , xfs_ino_t,
	380	uint, uint, xfs_inode_t **, xfs_daddr_t);
	381	void xfs_iput(xfs_inode_t *, uint);
	382	void xfs_iput_new(xfs_inode_t *, uint);
	383	void xfs_ilock(xfs_inode_t *, uint);
	384	int xfs_ilock_nowait(xfs_inode_t *, uint);
	385	void xfs_iunlock(xfs_inode_t *, uint);
	386	void xfs_ilock_demote(xfs_inode_t *, uint);
	387	void xfs_iflock(xfs_inode_t *);
	388	int xfs_iflock_nowait(xfs_inode_t *);
	389	uint xfs_ilock_map_shared(xfs_inode_t *);
	390	void xfs_iunlock_map_shared(xfs_inode_t *, uint);
	391	void xfs_ifunlock(xfs_inode_t *);
	392	void xfs_ireclaim(xfs_inode_t *);
	393	int xfs_finish_reclaim(xfs_inode_t *, int, int);
	394	int xfs_finish_reclaim_all(struct xfs_mount *, int);
	395
	396	/*
	397	* xfs_inode.c prototypes.
	398	*/
1da177e4 LT	399	int xfs_itobp(struct xfs_mount , struct xfs_trans ,
	400	xfs_inode_t , xfs_dinode_t , struct xfs_buf *,
	401	xfs_daddr_t);
	402	int xfs_iread(struct xfs_mount , struct xfs_trans , xfs_ino_t,
	403	xfs_inode_t **, xfs_daddr_t);
	404	int xfs_iread_extents(struct xfs_trans , xfs_inode_t , int);
31b084ae NS	405	int xfs_ialloc(struct xfs_trans , xfs_inode_t , mode_t,
	406	xfs_nlink_t, xfs_dev_t, struct cred *, xfs_prid_t,
	407	int, struct xfs_buf *, boolean_t , xfs_inode_t **);
1da177e4 LT	408	void xfs_xlate_dinode_core(xfs_caddr_t, struct xfs_dinode_core *,
	409	int);
	410	uint xfs_ip2xflags(struct xfs_inode *);
	411	uint xfs_dic2xflags(struct xfs_dinode_core *);
	412	int xfs_ifree(struct xfs_trans , xfs_inode_t ,
	413	struct xfs_bmap_free *);
	414	void xfs_itruncate_start(xfs_inode_t *, uint, xfs_fsize_t);
	415	int xfs_itruncate_finish(struct xfs_trans *, xfs_inode_t ,
	416	xfs_fsize_t, int, int);
	417	int xfs_iunlink(struct xfs_trans , xfs_inode_t );
	418	int xfs_igrow_start(xfs_inode_t , xfs_fsize_t, struct cred );
	419	void xfs_igrow_finish(struct xfs_trans , xfs_inode_t ,
	420	xfs_fsize_t, int);
	421
	422	void xfs_idestroy_fork(xfs_inode_t *, int);
	423	void xfs_idestroy(xfs_inode_t *);
	424	void xfs_idata_realloc(xfs_inode_t *, int, int);
	425	void xfs_iextract(xfs_inode_t *);
	426	void xfs_iext_realloc(xfs_inode_t *, int, int);
	427	void xfs_iroot_realloc(xfs_inode_t *, int, int);
	428	void xfs_ipin(xfs_inode_t *);
	429	void xfs_iunpin(xfs_inode_t *);
	430	int xfs_iextents_copy(xfs_inode_t , xfs_bmbt_rec_t , int);
	431	int xfs_iflush(xfs_inode_t *, uint);
efa80278	432	void xfs_iflush_all(struct xfs_mount *);
1da177e4 LT	433	int xfs_iaccess(xfs_inode_t , mode_t, cred_t );
	434	uint xfs_iroundup(uint);
	435	void xfs_ichgtime(xfs_inode_t *, int);
	436	xfs_fsize_t xfs_file_last_byte(xfs_inode_t *);
	437	void xfs_lock_inodes(xfs_inode_t **, int, int, uint);
	438
	439	#define xfs_ipincount(ip) ((unsigned int) atomic_read(&ip->i_pincount))
	440
	441	#ifdef DEBUG
	442	void xfs_isize_check(struct xfs_mount , xfs_inode_t , xfs_fsize_t);
	443	#else /* DEBUG */
	444	#define xfs_isize_check(mp, ip, isize)
	445	#endif /* DEBUG */
	446
	447	#if defined(DEBUG)
	448	void xfs_inobp_check(struct xfs_mount , struct xfs_buf );
	449	#else
	450	#define xfs_inobp_check(mp, bp)
	451	#endif /* DEBUG */
	452
	453	extern struct kmem_zone *xfs_chashlist_zone;
	454	extern struct kmem_zone *xfs_ifork_zone;
	455	extern struct kmem_zone *xfs_inode_zone;
	456	extern struct kmem_zone *xfs_ili_zone;
	457	extern struct vnodeops xfs_vnodeops;
	458
	459	#endif /* __KERNEL__ */
	460
	461	#endif /* __XFS_INODE_H__ */