[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__

struct posix_acl;
struct xfs_dinode;
struct xfs_inode;

#include "xfs_inode_fork.h"

/*
 * Inode location information.  Stored in the inode and passed to
 * xfs_imap_to_bp() to get a buffer and dinode for a given inode.
 */
struct xfs_imap {
	xfs_daddr_t	im_blkno;	/* starting BB of inode chunk */
	ushort		im_len;		/* length in BBs of inode chunk */
	ushort		im_boffset;	/* inode offset in block in bytes */
};

#ifdef __KERNEL__

struct xfs_buf;
struct xfs_bmap_free;
struct xfs_bmbt_irec;
struct xfs_inode_log_item;
struct xfs_mount;
struct xfs_trans;
struct xfs_dquot;

typedef struct xfs_inode {
	/* Inode linking and identification information. */
	struct xfs_mount	*i_mount;	/* fs mount struct ptr */
	struct xfs_dquot	*i_udquot;	/* user dquot */
	struct xfs_dquot	*i_gdquot;	/* group dquot */
	struct xfs_dquot	*i_pdquot;	/* project dquot */

	/* Inode location stuff */
	xfs_ino_t		i_ino;		/* inode number (agno/agino)*/
	struct xfs_imap		i_imap;		/* location for xfs_imap() */

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

	/* Transaction and locking information. */
	struct xfs_inode_log_item *i_itemp;	/* logging information */
	mrlock_t		i_lock;		/* inode lock */
	mrlock_t		i_iolock;	/* inode IO lock */
	atomic_t		i_pincount;	/* inode pin count */
	spinlock_t		i_flags_lock;	/* inode i_flags lock */
	/* Miscellaneous state. */
	unsigned long		i_flags;	/* see defined flags below */
	unsigned int		i_delayed_blks;	/* count of delay alloc blks */

	xfs_icdinode_t		i_d;		/* most of ondisk inode */

	/* VFS inode */
	struct inode		i_vnode;	/* embedded VFS inode */
} xfs_inode_t;

/* Convert from vfs inode to xfs inode */
static inline struct xfs_inode *XFS_I(struct inode *inode)
{
	return container_of(inode, struct xfs_inode, i_vnode);
}

/* convert from xfs inode to vfs inode */
static inline struct inode *VFS_I(struct xfs_inode *ip)
{
	return &ip->i_vnode;
}

/*
 * For regular files we only update the on-disk filesize when actually
 * writing data back to disk.  Until then only the copy in the VFS inode
 * is uptodate.
 */
static inline xfs_fsize_t XFS_ISIZE(struct xfs_inode *ip)
{
	if (S_ISREG(ip->i_d.di_mode))
		return i_size_read(VFS_I(ip));
	return ip->i_d.di_size;
}

/*
 * If this I/O goes past the on-disk inode size update it unless it would
 * be past the current in-core inode size.
 */
static inline xfs_fsize_t
xfs_new_eof(struct xfs_inode *ip, xfs_fsize_t new_size)
{
	xfs_fsize_t i_size = i_size_read(VFS_I(ip));

	if (new_size > i_size)
		new_size = i_size;
	return new_size > ip->i_d.di_size ? new_size : 0;
}

/*
 * i_flags helper functions
 */
static inline void
__xfs_iflags_set(xfs_inode_t *ip, unsigned short flags)
{
	ip->i_flags |= flags;
}

static inline void
xfs_iflags_set(xfs_inode_t *ip, unsigned short flags)
{
	spin_lock(&ip->i_flags_lock);
	__xfs_iflags_set(ip, flags);
	spin_unlock(&ip->i_flags_lock);
}

static inline void
xfs_iflags_clear(xfs_inode_t *ip, unsigned short flags)
{
	spin_lock(&ip->i_flags_lock);
	ip->i_flags &= ~flags;
	spin_unlock(&ip->i_flags_lock);
}

static inline int
__xfs_iflags_test(xfs_inode_t *ip, unsigned short flags)
{
	return (ip->i_flags & flags);
}

static inline int
xfs_iflags_test(xfs_inode_t *ip, unsigned short flags)
{
	int ret;
	spin_lock(&ip->i_flags_lock);
	ret = __xfs_iflags_test(ip, flags);
	spin_unlock(&ip->i_flags_lock);
	return ret;
}

static inline int
xfs_iflags_test_and_clear(xfs_inode_t *ip, unsigned short flags)
{
	int ret;

	spin_lock(&ip->i_flags_lock);
	ret = ip->i_flags & flags;
	if (ret)
		ip->i_flags &= ~flags;
	spin_unlock(&ip->i_flags_lock);
	return ret;
}

static inline int
xfs_iflags_test_and_set(xfs_inode_t *ip, unsigned short flags)
{
	int ret;

	spin_lock(&ip->i_flags_lock);
	ret = ip->i_flags & flags;
	if (!ret)
		ip->i_flags |= flags;
	spin_unlock(&ip->i_flags_lock);
	return ret;
}

/*
 * Project quota id helpers (previously projid was 16bit only
 * and using two 16bit values to hold new 32bit projid was chosen
 * to retain compatibility with "old" filesystems).
 */
static inline prid_t
xfs_get_projid(struct xfs_inode *ip)
{
	return (prid_t)ip->i_d.di_projid_hi << 16 | ip->i_d.di_projid_lo;
}

static inline void
xfs_set_projid(struct xfs_inode *ip,
		prid_t projid)
{
	ip->i_d.di_projid_hi = (__uint16_t) (projid >> 16);
	ip->i_d.di_projid_lo = (__uint16_t) (projid & 0xffff);
}

/*
 * In-core inode flags.
 */
#define XFS_IRECLAIM		(1 << 0) /* started reclaiming this inode */
#define XFS_ISTALE		(1 << 1) /* inode has been staled */
#define XFS_IRECLAIMABLE	(1 << 2) /* inode can be reclaimed */
#define XFS_INEW		(1 << 3) /* inode has just been allocated */
#define XFS_IFILESTREAM		(1 << 4) /* inode is in a filestream dir. */
#define XFS_ITRUNCATED		(1 << 5) /* truncated down so flush-on-close */
#define XFS_IDIRTY_RELEASE	(1 << 6) /* dirty release already seen */
#define __XFS_IFLOCK_BIT	7	 /* inode is being flushed right now */
#define XFS_IFLOCK		(1 << __XFS_IFLOCK_BIT)
#define __XFS_IPINNED_BIT	8	 /* wakeup key for zero pin count */
#define XFS_IPINNED		(1 << __XFS_IPINNED_BIT)
#define XFS_IDONTCACHE		(1 << 9) /* don't cache the inode long term */

/*
 * Per-lifetime flags need to be reset when re-using a reclaimable inode during
 * inode lookup. This prevents unintended behaviour on the new inode from
 * ocurring.
 */
#define XFS_IRECLAIM_RESET_FLAGS	\
	(XFS_IRECLAIMABLE | XFS_IRECLAIM | \
	 XFS_IDIRTY_RELEASE | XFS_ITRUNCATED | \
	 XFS_IFILESTREAM);

/*
 * Synchronize processes attempting to flush the in-core inode back to disk.
 */

extern void __xfs_iflock(struct xfs_inode *ip);

static inline int xfs_iflock_nowait(struct xfs_inode *ip)
{
	return !xfs_iflags_test_and_set(ip, XFS_IFLOCK);
}

static inline void xfs_iflock(struct xfs_inode *ip)
{
	if (!xfs_iflock_nowait(ip))
		__xfs_iflock(ip);
}

static inline void xfs_ifunlock(struct xfs_inode *ip)
{
	xfs_iflags_clear(ip, XFS_IFLOCK);
	smp_mb();
	wake_up_bit(&ip->i_flags, __XFS_IFLOCK_BIT);
}

static inline int xfs_isiflocked(struct xfs_inode *ip)
{
	return xfs_iflags_test(ip, XFS_IFLOCK);
}

/*
 * Flags for inode locking.
 * Bit ranges:	1<<1  - 1<<16-1 -- iolock/ilock modes (bitfield)
 *		1<<16 - 1<<32-1 -- lockdep annotation (integers)
 */
#define	XFS_IOLOCK_EXCL		(1<<0)
#define	XFS_IOLOCK_SHARED	(1<<1)
#define	XFS_ILOCK_EXCL		(1<<2)
#define	XFS_ILOCK_SHARED	(1<<3)

#define XFS_LOCK_MASK		(XFS_IOLOCK_EXCL | XFS_IOLOCK_SHARED \
				| XFS_ILOCK_EXCL | XFS_ILOCK_SHARED)

#define XFS_LOCK_FLAGS \
	{ XFS_IOLOCK_EXCL,	"IOLOCK_EXCL" }, \
	{ XFS_IOLOCK_SHARED,	"IOLOCK_SHARED" }, \
	{ XFS_ILOCK_EXCL,	"ILOCK_EXCL" }, \
	{ XFS_ILOCK_SHARED,	"ILOCK_SHARED" }


/*
 * Flags for lockdep annotations.
 *
 * XFS_LOCK_PARENT - for directory operations that require locking a
 * parent directory inode and a child entry inode.  The parent gets locked
 * with this flag so it gets a lockdep subclass of 1 and the child entry
 * lock will have a lockdep subclass of 0.
 *
 * XFS_LOCK_RTBITMAP/XFS_LOCK_RTSUM - the realtime device bitmap and summary
 * inodes do not participate in the normal lock order, and thus have their
 * own subclasses.
 *
 * XFS_LOCK_INUMORDER - for locking several inodes at the some time
 * with xfs_lock_inodes().  This flag is used as the starting subclass
 * and each subsequent lock acquired will increment the subclass by one.
 * So the first lock acquired will have a lockdep subclass of 4, the
 * second lock will have a lockdep subclass of 5, and so on. It is
 * the responsibility of the class builder to shift this to the correct
 * portion of the lock_mode lockdep mask.
 */
#define XFS_LOCK_PARENT		1
#define XFS_LOCK_RTBITMAP	2
#define XFS_LOCK_RTSUM		3
#define XFS_LOCK_INUMORDER	4

#define XFS_IOLOCK_SHIFT	16
#define	XFS_IOLOCK_PARENT	(XFS_LOCK_PARENT << XFS_IOLOCK_SHIFT)

#define XFS_ILOCK_SHIFT		24
#define	XFS_ILOCK_PARENT	(XFS_LOCK_PARENT << XFS_ILOCK_SHIFT)
#define	XFS_ILOCK_RTBITMAP	(XFS_LOCK_RTBITMAP << XFS_ILOCK_SHIFT)
#define	XFS_ILOCK_RTSUM		(XFS_LOCK_RTSUM << XFS_ILOCK_SHIFT)

#define XFS_IOLOCK_DEP_MASK	0x00ff0000
#define XFS_ILOCK_DEP_MASK	0xff000000
#define XFS_LOCK_DEP_MASK	(XFS_IOLOCK_DEP_MASK | XFS_ILOCK_DEP_MASK)

#define XFS_IOLOCK_DEP(flags)	(((flags) & XFS_IOLOCK_DEP_MASK) >> XFS_IOLOCK_SHIFT)
#define XFS_ILOCK_DEP(flags)	(((flags) & XFS_ILOCK_DEP_MASK) >> XFS_ILOCK_SHIFT)

/*
 * 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)	\
	(((pip)->i_mount->m_flags & XFS_MOUNT_GRPID) || \
	 ((pip)->i_d.di_mode & S_ISGID))


/*
 * xfs_inode.c prototypes.
 */
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);
int		xfs_isilocked(xfs_inode_t *, uint);
uint		xfs_ilock_map_shared(xfs_inode_t *);
void		xfs_iunlock_map_shared(xfs_inode_t *, uint);
int		xfs_ialloc(struct xfs_trans *, xfs_inode_t *, umode_t,
			   xfs_nlink_t, xfs_dev_t, prid_t, int,
			   struct xfs_buf **, xfs_inode_t **);

uint		xfs_ip2xflags(struct xfs_inode *);
uint		xfs_dic2xflags(struct xfs_dinode *);
int		xfs_ifree(struct xfs_trans *, xfs_inode_t *,
			   struct xfs_bmap_free *);
int		xfs_itruncate_extents(struct xfs_trans **, struct xfs_inode *,
				      int, xfs_fsize_t);
int		xfs_iunlink(struct xfs_trans *, xfs_inode_t *);

void		xfs_iext_realloc(xfs_inode_t *, int, int);
void		xfs_iunpin_wait(xfs_inode_t *);
int		xfs_iflush(struct xfs_inode *, struct xfs_buf **);
void		xfs_lock_inodes(xfs_inode_t **, int, uint);
void		xfs_lock_two_inodes(xfs_inode_t *, xfs_inode_t *, uint);

xfs_extlen_t	xfs_get_extsz_hint(struct xfs_inode *ip);

#define IHOLD(ip) \
do { \
	ASSERT(atomic_read(&VFS_I(ip)->i_count) > 0) ; \
	ihold(VFS_I(ip)); \
	trace_xfs_ihold(ip, _THIS_IP_); \
} while (0)

#define IRELE(ip) \
do { \
	trace_xfs_irele(ip, _THIS_IP_); \
	iput(VFS_I(ip)); \
} while (0)

#endif /* __KERNEL__ */

int		xfs_imap_to_bp(struct xfs_mount *, struct xfs_trans *,
			       struct xfs_imap *, struct xfs_dinode **,
			       struct xfs_buf **, uint, uint);
int		xfs_iread(struct xfs_mount *, struct xfs_trans *,
			  struct xfs_inode *, uint);
void		xfs_dinode_calc_crc(struct xfs_mount *, struct xfs_dinode *);
void		xfs_dinode_to_disk(struct xfs_dinode *,
				   struct xfs_icdinode *);
bool		xfs_can_free_eofblocks(struct xfs_inode *, bool);

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

#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_inode_zone;
extern const struct xfs_buf_ops xfs_inode_buf_ops;

#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
ef14f0c1	21	struct posix_acl;
347d1c01	22	struct xfs_dinode;
847fff5c	23	struct xfs_inode;
347d1c01	24
5c4d97d0	25	#include "xfs_inode_fork.h"
1da177e4	26
92bfc6e7 CH	27	/*
	28	* Inode location information. Stored in the inode and passed to
	29	* xfs_imap_to_bp() to get a buffer and dinode for a given inode.
	30	*/
	31	struct xfs_imap {
	32	xfs_daddr_t im_blkno; /* starting BB of inode chunk */
	33	ushort im_len; /* length in BBs of inode chunk */
	34	ushort im_boffset; /* inode offset in block in bytes */
	35	};
	36
847fff5c BN	37	#ifdef __KERNEL__
847fff5c BN	38
847fff5c BN	39	struct xfs_buf;
	40	struct xfs_bmap_free;
	41	struct xfs_bmbt_irec;
847fff5c BN	42	struct xfs_inode_log_item;
	43	struct xfs_mount;
	44	struct xfs_trans;
	45	struct xfs_dquot;
	46
1da177e4 LT	47	typedef struct xfs_inode {
1da177e4 LT	48	/* Inode linking and identification information. */
1da177e4	49	struct xfs_mount i_mount; / fs mount struct ptr */
1da177e4 LT	50	struct xfs_dquot i_udquot; / user dquot */
1da177e4 LT	51	struct xfs_dquot i_gdquot; / group dquot */
92f8ff73	52	struct xfs_dquot i_pdquot; / project dquot */
1da177e4 LT	53
	54	/* Inode location stuff */
	55	xfs_ino_t i_ino; /* inode number (agno/agino)*/
92bfc6e7	56	struct xfs_imap i_imap; /* location for xfs_imap() */
1da177e4 LT	57
	58	/* Extent information. */
	59	xfs_ifork_t i_afp; / attribute fork pointer */
	60	xfs_ifork_t i_df; /* data fork */
	61
	62	/* Transaction and locking information. */
1da177e4 LT	63	struct xfs_inode_log_item i_itemp; / logging information */
	64	mrlock_t i_lock; /* inode lock */
	65	mrlock_t i_iolock; /* inode IO lock */
1da177e4	66	atomic_t i_pincount; /* inode pin count */
f273ab84	67	spinlock_t i_flags_lock; /* inode i_flags lock */
1da177e4	68	/* Miscellaneous state. */
49e4c70e	69	unsigned long i_flags; /* see defined flags below */
1da177e4 LT	70	unsigned int i_delayed_blks; /* count of delay alloc blks */
1da177e4 LT	71
347d1c01	72	xfs_icdinode_t i_d; /* most of ondisk inode */
1da177e4	73
bf904248 DC	74	/* VFS inode */
bf904248 DC	75	struct inode i_vnode; /* embedded VFS inode */
1da177e4 LT	76	} xfs_inode_t;
1da177e4 LT	77
01651646 DC	78	/* Convert from vfs inode to xfs inode */
	79	static inline struct xfs_inode XFS_I(struct inode inode)
	80	{
bf904248	81	return container_of(inode, struct xfs_inode, i_vnode);
01651646 DC	82	}
01651646 DC	83
01651646 DC	84	/* convert from xfs inode to vfs inode */
	85	static inline struct inode VFS_I(struct xfs_inode ip)
	86	{
bf904248	87	return &ip->i_vnode;
01651646	88	}
01651646	89
ce7ae151 CH	90	/*
	91	* For regular files we only update the on-disk filesize when actually
	92	* writing data back to disk. Until then only the copy in the VFS inode
	93	* is uptodate.
	94	*/
	95	static inline xfs_fsize_t XFS_ISIZE(struct xfs_inode *ip)
	96	{
	97	if (S_ISREG(ip->i_d.di_mode))
	98	return i_size_read(VFS_I(ip));
	99	return ip->i_d.di_size;
	100	}
	101
6923e686 CH	102	/*
	103	* If this I/O goes past the on-disk inode size update it unless it would
	104	* be past the current in-core inode size.
	105	*/
	106	static inline xfs_fsize_t
	107	xfs_new_eof(struct xfs_inode *ip, xfs_fsize_t new_size)
	108	{
	109	xfs_fsize_t i_size = i_size_read(VFS_I(ip));
	110
	111	if (new_size > i_size)
	112	new_size = i_size;
	113	return new_size > ip->i_d.di_size ? new_size : 0;
	114	}
	115
7a18c386 DC	116	/*
	117	* i_flags helper functions
	118	*/
	119	static inline void
	120	__xfs_iflags_set(xfs_inode_t *ip, unsigned short flags)
	121	{
	122	ip->i_flags \|= flags;
	123	}
	124
	125	static inline void
	126	xfs_iflags_set(xfs_inode_t *ip, unsigned short flags)
	127	{
	128	spin_lock(&ip->i_flags_lock);
	129	__xfs_iflags_set(ip, flags);
	130	spin_unlock(&ip->i_flags_lock);
	131	}
	132
	133	static inline void
	134	xfs_iflags_clear(xfs_inode_t *ip, unsigned short flags)
	135	{
	136	spin_lock(&ip->i_flags_lock);
	137	ip->i_flags &= ~flags;
	138	spin_unlock(&ip->i_flags_lock);
	139	}
	140
	141	static inline int
	142	__xfs_iflags_test(xfs_inode_t *ip, unsigned short flags)
	143	{
	144	return (ip->i_flags & flags);
	145	}
	146
	147	static inline int
	148	xfs_iflags_test(xfs_inode_t *ip, unsigned short flags)
	149	{
	150	int ret;
	151	spin_lock(&ip->i_flags_lock);
	152	ret = __xfs_iflags_test(ip, flags);
	153	spin_unlock(&ip->i_flags_lock);
	154	return ret;
	155	}
09262b43 CH	156
	157	static inline int
	158	xfs_iflags_test_and_clear(xfs_inode_t *ip, unsigned short flags)
	159	{
	160	int ret;
	161
	162	spin_lock(&ip->i_flags_lock);
	163	ret = ip->i_flags & flags;
	164	if (ret)
	165	ip->i_flags &= ~flags;
	166	spin_unlock(&ip->i_flags_lock);
	167	return ret;
	168	}
1da177e4	169
474fce06 CH	170	static inline int
	171	xfs_iflags_test_and_set(xfs_inode_t *ip, unsigned short flags)
	172	{
	173	int ret;
	174
	175	spin_lock(&ip->i_flags_lock);
	176	ret = ip->i_flags & flags;
	177	if (!ret)
	178	ip->i_flags \|= flags;
	179	spin_unlock(&ip->i_flags_lock);
	180	return ret;
	181	}
	182
6743099c AM	183	/*
6743099c AM	184	* Project quota id helpers (previously projid was 16bit only
25985edc	185	* and using two 16bit values to hold new 32bit projid was chosen
6743099c AM	186	* to retain compatibility with "old" filesystems).
	187	*/
	188	static inline prid_t
	189	xfs_get_projid(struct xfs_inode *ip)
	190	{
	191	return (prid_t)ip->i_d.di_projid_hi << 16 \| ip->i_d.di_projid_lo;
	192	}
	193
	194	static inline void
	195	xfs_set_projid(struct xfs_inode *ip,
	196	prid_t projid)
	197	{
	198	ip->i_d.di_projid_hi = (__uint16_t) (projid >> 16);
	199	ip->i_d.di_projid_lo = (__uint16_t) (projid & 0xffff);
	200	}
	201
1da177e4 LT	202	/*
	203	* In-core inode flags.
	204	*/
474fce06 CH	205	#define XFS_IRECLAIM (1 << 0) /* started reclaiming this inode */
	206	#define XFS_ISTALE (1 << 1) /* inode has been staled */
	207	#define XFS_IRECLAIMABLE (1 << 2) /* inode can be reclaimed */
	208	#define XFS_INEW (1 << 3) /* inode has just been allocated */
	209	#define XFS_IFILESTREAM (1 << 4) /* inode is in a filestream dir. */
	210	#define XFS_ITRUNCATED (1 << 5) /* truncated down so flush-on-close */
	211	#define XFS_IDIRTY_RELEASE (1 << 6) /* dirty release already seen */
	212	#define __XFS_IFLOCK_BIT 7 /* inode is being flushed right now */
	213	#define XFS_IFLOCK (1 << __XFS_IFLOCK_BIT)
f392e631 CH	214	#define __XFS_IPINNED_BIT 8 /* wakeup key for zero pin count */
f392e631 CH	215	#define XFS_IPINNED (1 << __XFS_IPINNED_BIT)
5132ba8f	216	#define XFS_IDONTCACHE (1 << 9) /* don't cache the inode long term */
1da177e4	217
778e24bb DC	218	/*
778e24bb DC	219	* Per-lifetime flags need to be reset when re-using a reclaimable inode during
5132ba8f	220	* inode lookup. This prevents unintended behaviour on the new inode from
778e24bb DC	221	* ocurring.
	222	*/
	223	#define XFS_IRECLAIM_RESET_FLAGS \
	224	(XFS_IRECLAIMABLE \| XFS_IRECLAIM \| \
	225	XFS_IDIRTY_RELEASE \| XFS_ITRUNCATED \| \
	226	XFS_IFILESTREAM);
	227
474fce06 CH	228	/*
	229	* Synchronize processes attempting to flush the in-core inode back to disk.
	230	*/
	231
	232	extern void __xfs_iflock(struct xfs_inode *ip);
	233
	234	static inline int xfs_iflock_nowait(struct xfs_inode *ip)
	235	{
	236	return !xfs_iflags_test_and_set(ip, XFS_IFLOCK);
	237	}
	238
	239	static inline void xfs_iflock(struct xfs_inode *ip)
	240	{
	241	if (!xfs_iflock_nowait(ip))
	242	__xfs_iflock(ip);
	243	}
	244
	245	static inline void xfs_ifunlock(struct xfs_inode *ip)
	246	{
	247	xfs_iflags_clear(ip, XFS_IFLOCK);
311f08ac	248	smp_mb();
474fce06 CH	249	wake_up_bit(&ip->i_flags, __XFS_IFLOCK_BIT);
	250	}
	251
	252	static inline int xfs_isiflocked(struct xfs_inode *ip)
	253	{
	254	return xfs_iflags_test(ip, XFS_IFLOCK);
	255	}
	256
1da177e4 LT	257	/*
1da177e4 LT	258	* Flags for inode locking.
f7c66ce3 LM	259	* Bit ranges: 1<<1 - 1<<16-1 -- iolock/ilock modes (bitfield)
f7c66ce3 LM	260	* 1<<16 - 1<<32-1 -- lockdep annotation (integers)
1da177e4	261	*/
f7c66ce3 LM	262	#define XFS_IOLOCK_EXCL (1<<0)
	263	#define XFS_IOLOCK_SHARED (1<<1)
	264	#define XFS_ILOCK_EXCL (1<<2)
	265	#define XFS_ILOCK_SHARED (1<<3)
1da177e4	266
f7c66ce3	267	#define XFS_LOCK_MASK (XFS_IOLOCK_EXCL \| XFS_IOLOCK_SHARED \
579aa9ca	268	\| XFS_ILOCK_EXCL \| XFS_ILOCK_SHARED)
f7c66ce3	269
0b1b213f CH	270	#define XFS_LOCK_FLAGS \
	271	{ XFS_IOLOCK_EXCL, "IOLOCK_EXCL" }, \
	272	{ XFS_IOLOCK_SHARED, "IOLOCK_SHARED" }, \
	273	{ XFS_ILOCK_EXCL, "ILOCK_EXCL" }, \
5b03ff1b	274	{ XFS_ILOCK_SHARED, "ILOCK_SHARED" }
0b1b213f CH	275
0b1b213f CH	276
f7c66ce3 LM	277	/*
	278	* Flags for lockdep annotations.
	279	*
9681153b CH	280	* XFS_LOCK_PARENT - for directory operations that require locking a
	281	* parent directory inode and a child entry inode. The parent gets locked
	282	* with this flag so it gets a lockdep subclass of 1 and the child entry
	283	* lock will have a lockdep subclass of 0.
	284	*
	285	* XFS_LOCK_RTBITMAP/XFS_LOCK_RTSUM - the realtime device bitmap and summary
	286	* inodes do not participate in the normal lock order, and thus have their
	287	* own subclasses.
f7c66ce3	288	*
0f1145cc	289	* XFS_LOCK_INUMORDER - for locking several inodes at the some time
f7c66ce3 LM	290	* with xfs_lock_inodes(). This flag is used as the starting subclass
f7c66ce3 LM	291	* and each subsequent lock acquired will increment the subclass by one.
9681153b CH	292	* So the first lock acquired will have a lockdep subclass of 4, the
9681153b CH	293	* second lock will have a lockdep subclass of 5, and so on. It is
0f1145cc DC	294	* the responsibility of the class builder to shift this to the correct
0f1145cc DC	295	* portion of the lock_mode lockdep mask.
f7c66ce3	296	*/
0f1145cc	297	#define XFS_LOCK_PARENT 1
9681153b CH	298	#define XFS_LOCK_RTBITMAP 2
	299	#define XFS_LOCK_RTSUM 3
	300	#define XFS_LOCK_INUMORDER 4
0f1145cc	301
f7c66ce3	302	#define XFS_IOLOCK_SHIFT 16
0f1145cc	303	#define XFS_IOLOCK_PARENT (XFS_LOCK_PARENT << XFS_IOLOCK_SHIFT)
f7c66ce3 LM	304
f7c66ce3 LM	305	#define XFS_ILOCK_SHIFT 24
0f1145cc	306	#define XFS_ILOCK_PARENT (XFS_LOCK_PARENT << XFS_ILOCK_SHIFT)
9681153b CH	307	#define XFS_ILOCK_RTBITMAP (XFS_LOCK_RTBITMAP << XFS_ILOCK_SHIFT)
9681153b CH	308	#define XFS_ILOCK_RTSUM (XFS_LOCK_RTSUM << XFS_ILOCK_SHIFT)
f7c66ce3 LM	309
	310	#define XFS_IOLOCK_DEP_MASK 0x00ff0000
	311	#define XFS_ILOCK_DEP_MASK 0xff000000
	312	#define XFS_LOCK_DEP_MASK (XFS_IOLOCK_DEP_MASK \| XFS_ILOCK_DEP_MASK)
	313
	314	#define XFS_IOLOCK_DEP(flags) (((flags) & XFS_IOLOCK_DEP_MASK) >> XFS_IOLOCK_SHIFT)
	315	#define XFS_ILOCK_DEP(flags) (((flags) & XFS_ILOCK_DEP_MASK) >> XFS_ILOCK_SHIFT)
1da177e4	316
1da177e4 LT	317	/*
	318	* For multiple groups support: if S_ISGID bit is set in the parent
	319	* directory, group of new file is set to that of the parent, and
	320	* new subdirectory gets S_ISGID bit from parent.
	321	*/
bd186aa9 CH	322	#define XFS_INHERIT_GID(pip) \
	323	(((pip)->i_mount->m_flags & XFS_MOUNT_GRPID) \|\| \
	324	((pip)->i_d.di_mode & S_ISGID))
1da177e4	325
33479e05	326
745b1f47	327	/*
33479e05	328	* xfs_inode.c prototypes.
745b1f47	329	*/
1da177e4 LT	330	void xfs_ilock(xfs_inode_t *, uint);
	331	int xfs_ilock_nowait(xfs_inode_t *, uint);
	332	void xfs_iunlock(xfs_inode_t *, uint);
	333	void xfs_ilock_demote(xfs_inode_t *, uint);
579aa9ca	334	int xfs_isilocked(xfs_inode_t *, uint);
1da177e4 LT	335	uint xfs_ilock_map_shared(xfs_inode_t *);
1da177e4 LT	336	void xfs_iunlock_map_shared(xfs_inode_t *, uint);
576b1d67	337	int xfs_ialloc(struct xfs_trans , xfs_inode_t , umode_t,
6743099c	338	xfs_nlink_t, xfs_dev_t, prid_t, int,
08358906	339	struct xfs_buf , xfs_inode_t );
347d1c01	340
1da177e4	341	uint xfs_ip2xflags(struct xfs_inode *);
45ba598e	342	uint xfs_dic2xflags(struct xfs_dinode *);
1da177e4 LT	343	int xfs_ifree(struct xfs_trans , xfs_inode_t ,
1da177e4 LT	344	struct xfs_bmap_free *);
8f04c47a CH	345	int xfs_itruncate_extents(struct xfs_trans *, struct xfs_inode ,
8f04c47a CH	346	int, xfs_fsize_t);
1da177e4	347	int xfs_iunlink(struct xfs_trans , xfs_inode_t );
1da177e4	348
1da177e4	349	void xfs_iext_realloc(xfs_inode_t *, int, int);
777df5af	350	void xfs_iunpin_wait(xfs_inode_t *);
4c46819a	351	int xfs_iflush(struct xfs_inode , struct xfs_buf *);
cfa853e4	352	void xfs_lock_inodes(xfs_inode_t **, int, uint);
e1cccd91	353	void xfs_lock_two_inodes(xfs_inode_t , xfs_inode_t , uint);
1da177e4	354
2a0ec1d9 DC	355	xfs_extlen_t xfs_get_extsz_hint(struct xfs_inode *ip);
2a0ec1d9 DC	356
5a8d0f3c CH	357	#define IHOLD(ip) \
	358	do { \
	359	ASSERT(atomic_read(&VFS_I(ip)->i_count) > 0) ; \
7de9c6ee	360	ihold(VFS_I(ip)); \
0b1b213f	361	trace_xfs_ihold(ip, _THIS_IP_); \
5a8d0f3c CH	362	} while (0)
	363
	364	#define IRELE(ip) \
	365	do { \
0b1b213f	366	trace_xfs_irele(ip, _THIS_IP_); \
5a8d0f3c CH	367	iput(VFS_I(ip)); \
	368	} while (0)
	369
847fff5c BN	370	#endif /* __KERNEL__ */
847fff5c BN	371
475ee413 CH	372	int xfs_imap_to_bp(struct xfs_mount , struct xfs_trans ,
	373	struct xfs_imap , struct xfs_dinode *,
	374	struct xfs_buf **, uint, uint);
6d73cf13	375	int xfs_iread(struct xfs_mount , struct xfs_trans ,
7b6259e7	376	struct xfs_inode *, uint);
93848a99	377	void xfs_dinode_calc_crc(struct xfs_mount , struct xfs_dinode );
81591fe2	378	void xfs_dinode_to_disk(struct xfs_dinode *,
847fff5c	379	struct xfs_icdinode *);
72b53efa	380	bool xfs_can_free_eofblocks(struct xfs_inode *, bool);
4eea22f0	381
1da177e4 LT	382	#define xfs_ipincount(ip) ((unsigned int) atomic_read(&ip->i_pincount))
1da177e4 LT	383
1da177e4 LT	384	#if defined(DEBUG)
	385	void xfs_inobp_check(struct xfs_mount , struct xfs_buf );
	386	#else
	387	#define xfs_inobp_check(mp, bp)
	388	#endif /* DEBUG */
	389
1da177e4	390	extern struct kmem_zone *xfs_inode_zone;
1813dd64	391	extern const struct xfs_buf_ops xfs_inode_buf_ops;
1da177e4	392
1da177e4	393	#endif /* __XFS_INODE_H__ */