[deliverable/linux.git] / fs / xfs / linux-2.6 / xfs_vnode.h

/*
 * Copyright (c) 2000-2005 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_VNODE_H__
#define __XFS_VNODE_H__

struct file;
struct bhv_vfs;
struct bhv_vattr;
struct xfs_iomap;
struct attrlist_cursor_kern;

typedef struct dentry	bhv_vname_t;
typedef __u64		bhv_vnumber_t;

typedef struct bhv_vnode {
	struct inode	v_inode;		/* Linux inode */
	/* inode MUST be last */
} bhv_vnode_t;

#define VN_ISLNK(vp)	S_ISLNK((vp)->v_inode.i_mode)
#define VN_ISREG(vp)	S_ISREG((vp)->v_inode.i_mode)
#define VN_ISDIR(vp)	S_ISDIR((vp)->v_inode.i_mode)
#define VN_ISCHR(vp)	S_ISCHR((vp)->v_inode.i_mode)
#define VN_ISBLK(vp)	S_ISBLK((vp)->v_inode.i_mode)

/*
 * Vnode to Linux inode mapping.
 */
static inline struct bhv_vnode *vn_from_inode(struct inode *inode)
{
	return container_of(inode, bhv_vnode_t, v_inode);
}
static inline struct inode *vn_to_inode(struct bhv_vnode *vnode)
{
	return &vnode->v_inode;
}

/*
 * Values for the vop_rwlock/rwunlock flags parameter.
 */
typedef enum bhv_vrwlock {
	VRWLOCK_NONE,
	VRWLOCK_READ,
	VRWLOCK_WRITE,
	VRWLOCK_WRITE_DIRECT,
	VRWLOCK_TRY_READ,
	VRWLOCK_TRY_WRITE
} bhv_vrwlock_t;

/*
 * Return values for xfs_inactive.  A return value of
 * VN_INACTIVE_NOCACHE implies that the file system behavior
 * has disassociated its state and bhv_desc_t from the vnode.
 */
#define	VN_INACTIVE_CACHE	0
#define	VN_INACTIVE_NOCACHE	1

/*
 * Flags for read/write calls - same values as IRIX
 */
#define IO_ISAIO	0x00001		/* don't wait for completion */
#define IO_ISDIRECT	0x00004		/* bypass page cache */
#define IO_INVIS	0x00020		/* don't update inode timestamps */

/*
 * Flags for vop_iflush call
 */
#define FLUSH_SYNC		1	/* wait for flush to complete	*/
#define FLUSH_INODE		2	/* flush the inode itself	*/
#define FLUSH_LOG		4	/* force the last log entry for
					 * this inode out to disk	*/

/*
 * Flush/Invalidate options for vop_toss/flush/flushinval_pages.
 */
#define FI_NONE			0	/* none */
#define FI_REMAPF		1	/* Do a remapf prior to the operation */
#define FI_REMAPF_LOCKED	2	/* Do a remapf prior to the operation.
					   Prevent VM access to the pages until
					   the operation completes. */

/*
 * Vnode attributes.  va_mask indicates those attributes the caller
 * wants to set or extract.
 */
typedef struct bhv_vattr {
	int		va_mask;	/* bit-mask of attributes present */
	mode_t		va_mode;	/* file access mode and type */
	xfs_nlink_t	va_nlink;	/* number of references to file */
	uid_t		va_uid;		/* owner user id */
	gid_t		va_gid;		/* owner group id */
	xfs_ino_t	va_nodeid;	/* file id */
	xfs_off_t	va_size;	/* file size in bytes */
	u_long		va_blocksize;	/* blocksize preferred for i/o */
	struct timespec	va_atime;	/* time of last access */
	struct timespec	va_mtime;	/* time of last modification */
	struct timespec	va_ctime;	/* time file changed */
	u_int		va_gen;		/* generation number of file */
	xfs_dev_t	va_rdev;	/* device the special file represents */
	__int64_t	va_nblocks;	/* number of blocks allocated */
	u_long		va_xflags;	/* random extended file flags */
	u_long		va_extsize;	/* file extent size */
	u_long		va_nextents;	/* number of extents in file */
	u_long		va_anextents;	/* number of attr extents in file */
	prid_t		va_projid;	/* project id */
} bhv_vattr_t;

/*
 * setattr or getattr attributes
 */
#define XFS_AT_TYPE		0x00000001
#define XFS_AT_MODE		0x00000002
#define XFS_AT_UID		0x00000004
#define XFS_AT_GID		0x00000008
#define XFS_AT_FSID		0x00000010
#define XFS_AT_NODEID		0x00000020
#define XFS_AT_NLINK		0x00000040
#define XFS_AT_SIZE		0x00000080
#define XFS_AT_ATIME		0x00000100
#define XFS_AT_MTIME		0x00000200
#define XFS_AT_CTIME		0x00000400
#define XFS_AT_RDEV		0x00000800
#define XFS_AT_BLKSIZE		0x00001000
#define XFS_AT_NBLOCKS		0x00002000
#define XFS_AT_VCODE		0x00004000
#define XFS_AT_MAC		0x00008000
#define XFS_AT_UPDATIME		0x00010000
#define XFS_AT_UPDMTIME		0x00020000
#define XFS_AT_UPDCTIME		0x00040000
#define XFS_AT_ACL		0x00080000
#define XFS_AT_CAP		0x00100000
#define XFS_AT_INF		0x00200000
#define XFS_AT_XFLAGS		0x00400000
#define XFS_AT_EXTSIZE		0x00800000
#define XFS_AT_NEXTENTS		0x01000000
#define XFS_AT_ANEXTENTS	0x02000000
#define XFS_AT_PROJID		0x04000000
#define XFS_AT_SIZE_NOPERM	0x08000000
#define XFS_AT_GENCOUNT		0x10000000

#define XFS_AT_ALL	(XFS_AT_TYPE|XFS_AT_MODE|XFS_AT_UID|XFS_AT_GID|\
		XFS_AT_FSID|XFS_AT_NODEID|XFS_AT_NLINK|XFS_AT_SIZE|\
		XFS_AT_ATIME|XFS_AT_MTIME|XFS_AT_CTIME|XFS_AT_RDEV|\
		XFS_AT_BLKSIZE|XFS_AT_NBLOCKS|XFS_AT_VCODE|XFS_AT_MAC|\
		XFS_AT_ACL|XFS_AT_CAP|XFS_AT_INF|XFS_AT_XFLAGS|XFS_AT_EXTSIZE|\
		XFS_AT_NEXTENTS|XFS_AT_ANEXTENTS|XFS_AT_PROJID|XFS_AT_GENCOUNT)

#define XFS_AT_STAT	(XFS_AT_TYPE|XFS_AT_MODE|XFS_AT_UID|XFS_AT_GID|\
		XFS_AT_FSID|XFS_AT_NODEID|XFS_AT_NLINK|XFS_AT_SIZE|\
		XFS_AT_ATIME|XFS_AT_MTIME|XFS_AT_CTIME|XFS_AT_RDEV|\
		XFS_AT_BLKSIZE|XFS_AT_NBLOCKS|XFS_AT_PROJID)

#define XFS_AT_TIMES	(XFS_AT_ATIME|XFS_AT_MTIME|XFS_AT_CTIME)

#define XFS_AT_UPDTIMES	(XFS_AT_UPDATIME|XFS_AT_UPDMTIME|XFS_AT_UPDCTIME)

#define XFS_AT_NOSET	(XFS_AT_NLINK|XFS_AT_RDEV|XFS_AT_FSID|XFS_AT_NODEID|\
		XFS_AT_TYPE|XFS_AT_BLKSIZE|XFS_AT_NBLOCKS|XFS_AT_VCODE|\
		XFS_AT_NEXTENTS|XFS_AT_ANEXTENTS|XFS_AT_GENCOUNT)

/*
 *  Modes.
 */
#define VSUID	S_ISUID		/* set user id on execution */
#define VSGID	S_ISGID		/* set group id on execution */
#define VSVTX	S_ISVTX		/* save swapped text even after use */
#define VREAD	S_IRUSR		/* read, write, execute permissions */
#define VWRITE	S_IWUSR
#define VEXEC	S_IXUSR

#define MODEMASK S_IALLUGO	/* mode bits plus permission bits */

/*
 * Check whether mandatory file locking is enabled.
 */
#define MANDLOCK(vp, mode)	\
	(VN_ISREG(vp) && ((mode) & (VSGID|(VEXEC>>3))) == VSGID)

extern void	vn_init(void);
extern bhv_vnode_t	*vn_initialize(struct inode *);
extern int	vn_revalidate(struct bhv_vnode *);
extern int	__vn_revalidate(struct bhv_vnode *, bhv_vattr_t *);
extern void	vn_revalidate_core(struct bhv_vnode *, bhv_vattr_t *);

/*
 * Yeah, these don't take vnode anymore at all, all this should be
 * cleaned up at some point.
 */
extern void	vn_iowait(struct xfs_inode *ip);
extern void	vn_iowake(struct xfs_inode *ip);
extern void	vn_ioerror(struct xfs_inode *ip, int error, char *f, int l);

static inline int vn_count(struct bhv_vnode *vp)
{
	return atomic_read(&vn_to_inode(vp)->i_count);
}

/*
 * Vnode reference counting functions (and macros for compatibility).
 */
extern bhv_vnode_t	*vn_hold(struct bhv_vnode *);

#if defined(XFS_VNODE_TRACE)
#define VN_HOLD(vp)		\
	((void)vn_hold(vp),	\
	  vn_trace_hold(xfs_vtoi(vp), __FILE__, __LINE__, (inst_t *)__return_address))
#define VN_RELE(vp)		\
	  (vn_trace_rele(xfs_vtoi(vp), __FILE__, __LINE__, (inst_t *)__return_address), \
	   iput(vn_to_inode(vp)))
#else
#define VN_HOLD(vp)		((void)vn_hold(vp))
#define VN_RELE(vp)		(iput(vn_to_inode(vp)))
#endif

static inline struct bhv_vnode *vn_grab(struct bhv_vnode *vp)
{
	struct inode *inode = igrab(vn_to_inode(vp));
	return inode ? vn_from_inode(inode) : NULL;
}

/*
 * Vname handling macros.
 */
#define VNAME(dentry)		((char *) (dentry)->d_name.name)
#define VNAMELEN(dentry)	((dentry)->d_name.len)
#define VNAME_TO_VNODE(dentry)	(vn_from_inode((dentry)->d_inode))

/*
 * Dealing with bad inodes
 */
static inline void vn_mark_bad(struct bhv_vnode *vp)
{
	make_bad_inode(vn_to_inode(vp));
}

static inline int VN_BAD(struct bhv_vnode *vp)
{
	return is_bad_inode(vn_to_inode(vp));
}

/*
 * Extracting atime values in various formats
 */
static inline void vn_atime_to_bstime(bhv_vnode_t *vp, xfs_bstime_t *bs_atime)
{
	bs_atime->tv_sec = vp->v_inode.i_atime.tv_sec;
	bs_atime->tv_nsec = vp->v_inode.i_atime.tv_nsec;
}

static inline void vn_atime_to_timespec(bhv_vnode_t *vp, struct timespec *ts)
{
	*ts = vp->v_inode.i_atime;
}

static inline void vn_atime_to_time_t(bhv_vnode_t *vp, time_t *tt)
{
	*tt = vp->v_inode.i_atime.tv_sec;
}

/*
 * Some useful predicates.
 */
#define VN_MAPPED(vp)	mapping_mapped(vn_to_inode(vp)->i_mapping)
#define VN_CACHED(vp)	(vn_to_inode(vp)->i_mapping->nrpages)
#define VN_DIRTY(vp)	mapping_tagged(vn_to_inode(vp)->i_mapping, \
					PAGECACHE_TAG_DIRTY)

/*
 * Flags to vop_setattr/getattr.
 */
#define	ATTR_UTIME	0x01	/* non-default utime(2) request */
#define	ATTR_DMI	0x08	/* invocation from a DMI function */
#define	ATTR_LAZY	0x80	/* set/get attributes lazily */
#define	ATTR_NONBLOCK	0x100	/* return EAGAIN if operation would block */
#define ATTR_NOLOCK	0x200	/* Don't grab any conflicting locks */
#define ATTR_NOSIZETOK	0x400	/* Don't get the SIZE token */

/*
 * Flags to vop_fsync/reclaim.
 */
#define FSYNC_NOWAIT	0	/* asynchronous flush */
#define FSYNC_WAIT	0x1	/* synchronous fsync or forced reclaim */
#define FSYNC_INVAL	0x2	/* flush and invalidate cached data */
#define FSYNC_DATA	0x4	/* synchronous fsync of data only */

/*
 * Tracking vnode activity.
 */
#if defined(XFS_VNODE_TRACE)

#define	VNODE_TRACE_SIZE	16		/* number of trace entries */
#define	VNODE_KTRACE_ENTRY	1
#define	VNODE_KTRACE_EXIT	2
#define	VNODE_KTRACE_HOLD	3
#define	VNODE_KTRACE_REF	4
#define	VNODE_KTRACE_RELE	5

extern void vn_trace_entry(struct xfs_inode *, const char *, inst_t *);
extern void vn_trace_exit(struct xfs_inode *, const char *, inst_t *);
extern void vn_trace_hold(struct xfs_inode *, char *, int, inst_t *);
extern void vn_trace_ref(struct xfs_inode *, char *, int, inst_t *);
extern void vn_trace_rele(struct xfs_inode *, char *, int, inst_t *);
#else
#define	vn_trace_entry(a,b,c)
#define	vn_trace_exit(a,b,c)
#define	vn_trace_hold(a,b,c,d)
#define	vn_trace_ref(a,b,c,d)
#define	vn_trace_rele(a,b,c,d)
#endif

#endif	/* __XFS_VNODE_H__ */
Commit	Line	Data
1da177e4	1	/*
7b718769 NS	2	* Copyright (c) 2000-2005 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_VNODE_H__
	19	#define __XFS_VNODE_H__
	20
1da177e4	21	struct file;
8285fb58 NS	22	struct bhv_vfs;
8285fb58 NS	23	struct bhv_vattr;
1da177e4 LT	24	struct xfs_iomap;
	25	struct attrlist_cursor_kern;
	26
8285fb58 NS	27	typedef struct dentry bhv_vname_t;
8285fb58 NS	28	typedef __u64 bhv_vnumber_t;
1da177e4	29
67fcaa73	30	typedef struct bhv_vnode {
9effd8e6 ES	31	struct inode v_inode; /* Linux inode */
9effd8e6 ES	32	/* inode MUST be last */
67fcaa73	33	} bhv_vnode_t;
1da177e4	34
0432dab2 CH	35	#define VN_ISLNK(vp) S_ISLNK((vp)->v_inode.i_mode)
	36	#define VN_ISREG(vp) S_ISREG((vp)->v_inode.i_mode)
	37	#define VN_ISDIR(vp) S_ISDIR((vp)->v_inode.i_mode)
	38	#define VN_ISCHR(vp) S_ISCHR((vp)->v_inode.i_mode)
	39	#define VN_ISBLK(vp) S_ISBLK((vp)->v_inode.i_mode)
	40
1da177e4 LT	41	/*
	42	* Vnode to Linux inode mapping.
	43	*/
67fcaa73	44	static inline struct bhv_vnode vn_from_inode(struct inode inode)
ec86dc02	45	{
71306f3b	46	return container_of(inode, bhv_vnode_t, v_inode);
ec86dc02	47	}
67fcaa73	48	static inline struct inode vn_to_inode(struct bhv_vnode vnode)
ec86dc02 NS	49	{
	50	return &vnode->v_inode;
	51	}
1da177e4	52
1da177e4	53	/*
67fcaa73	54	* Values for the vop_rwlock/rwunlock flags parameter.
1da177e4	55	*/
8285fb58	56	typedef enum bhv_vrwlock {
1da177e4 LT	57	VRWLOCK_NONE,
	58	VRWLOCK_READ,
	59	VRWLOCK_WRITE,
	60	VRWLOCK_WRITE_DIRECT,
	61	VRWLOCK_TRY_READ,
	62	VRWLOCK_TRY_WRITE
8285fb58	63	} bhv_vrwlock_t;
1da177e4 LT	64
1da177e4 LT	65	/*
739bfb2a	66	* Return values for xfs_inactive. A return value of
1da177e4 LT	67	* VN_INACTIVE_NOCACHE implies that the file system behavior
	68	* has disassociated its state and bhv_desc_t from the vnode.
	69	*/
	70	#define VN_INACTIVE_CACHE 0
	71	#define VN_INACTIVE_NOCACHE 1
	72
1da177e4 LT	73	/*
	74	* Flags for read/write calls - same values as IRIX
	75	*/
	76	#define IO_ISAIO 0x00001 /* don't wait for completion */
	77	#define IO_ISDIRECT 0x00004 /* bypass page cache */
	78	#define IO_INVIS 0x00020 /* don't update inode timestamps */
	79
	80	/*
67fcaa73	81	* Flags for vop_iflush call
1da177e4 LT	82	*/
	83	#define FLUSH_SYNC 1 /* wait for flush to complete */
	84	#define FLUSH_INODE 2 /* flush the inode itself */
	85	#define FLUSH_LOG 4 /* force the last log entry for
	86	* this inode out to disk */
	87
	88	/*
67fcaa73	89	* Flush/Invalidate options for vop_toss/flush/flushinval_pages.
1da177e4 LT	90	*/
	91	#define FI_NONE 0 /* none */
	92	#define FI_REMAPF 1 /* Do a remapf prior to the operation */
	93	#define FI_REMAPF_LOCKED 2 /* Do a remapf prior to the operation.
	94	Prevent VM access to the pages until
	95	the operation completes. */
	96
	97	/*
	98	* Vnode attributes. va_mask indicates those attributes the caller
	99	* wants to set or extract.
	100	*/
8285fb58	101	typedef struct bhv_vattr {
1da177e4	102	int va_mask; /* bit-mask of attributes present */
1da177e4	103	mode_t va_mode; /* file access mode and type */
31b084ae	104	xfs_nlink_t va_nlink; /* number of references to file */
1da177e4 LT	105	uid_t va_uid; /* owner user id */
	106	gid_t va_gid; /* owner group id */
	107	xfs_ino_t va_nodeid; /* file id */
	108	xfs_off_t va_size; /* file size in bytes */
	109	u_long va_blocksize; /* blocksize preferred for i/o */
	110	struct timespec va_atime; /* time of last access */
	111	struct timespec va_mtime; /* time of last modification */
	112	struct timespec va_ctime; /* time file changed */
	113	u_int va_gen; /* generation number of file */
	114	xfs_dev_t va_rdev; /* device the special file represents */
	115	__int64_t va_nblocks; /* number of blocks allocated */
	116	u_long va_xflags; /* random extended file flags */
	117	u_long va_extsize; /* file extent size */
	118	u_long va_nextents; /* number of extents in file */
	119	u_long va_anextents; /* number of attr extents in file */
b74e2159	120	prid_t va_projid; /* project id */
8285fb58	121	} bhv_vattr_t;
1da177e4 LT	122
	123	/*
	124	* setattr or getattr attributes
	125	*/
	126	#define XFS_AT_TYPE 0x00000001
	127	#define XFS_AT_MODE 0x00000002
	128	#define XFS_AT_UID 0x00000004
	129	#define XFS_AT_GID 0x00000008
	130	#define XFS_AT_FSID 0x00000010
	131	#define XFS_AT_NODEID 0x00000020
	132	#define XFS_AT_NLINK 0x00000040
	133	#define XFS_AT_SIZE 0x00000080
	134	#define XFS_AT_ATIME 0x00000100
	135	#define XFS_AT_MTIME 0x00000200
	136	#define XFS_AT_CTIME 0x00000400
	137	#define XFS_AT_RDEV 0x00000800
	138	#define XFS_AT_BLKSIZE 0x00001000
	139	#define XFS_AT_NBLOCKS 0x00002000
	140	#define XFS_AT_VCODE 0x00004000
	141	#define XFS_AT_MAC 0x00008000
	142	#define XFS_AT_UPDATIME 0x00010000
	143	#define XFS_AT_UPDMTIME 0x00020000
	144	#define XFS_AT_UPDCTIME 0x00040000
	145	#define XFS_AT_ACL 0x00080000
	146	#define XFS_AT_CAP 0x00100000
	147	#define XFS_AT_INF 0x00200000
	148	#define XFS_AT_XFLAGS 0x00400000
	149	#define XFS_AT_EXTSIZE 0x00800000
	150	#define XFS_AT_NEXTENTS 0x01000000
	151	#define XFS_AT_ANEXTENTS 0x02000000
	152	#define XFS_AT_PROJID 0x04000000
	153	#define XFS_AT_SIZE_NOPERM 0x08000000
	154	#define XFS_AT_GENCOUNT 0x10000000
	155
	156	#define XFS_AT_ALL (XFS_AT_TYPE\|XFS_AT_MODE\|XFS_AT_UID\|XFS_AT_GID\|\
	157	XFS_AT_FSID\|XFS_AT_NODEID\|XFS_AT_NLINK\|XFS_AT_SIZE\|\
	158	XFS_AT_ATIME\|XFS_AT_MTIME\|XFS_AT_CTIME\|XFS_AT_RDEV\|\
	159	XFS_AT_BLKSIZE\|XFS_AT_NBLOCKS\|XFS_AT_VCODE\|XFS_AT_MAC\|\
	160	XFS_AT_ACL\|XFS_AT_CAP\|XFS_AT_INF\|XFS_AT_XFLAGS\|XFS_AT_EXTSIZE\|\
	161	XFS_AT_NEXTENTS\|XFS_AT_ANEXTENTS\|XFS_AT_PROJID\|XFS_AT_GENCOUNT)
	162
	163	#define XFS_AT_STAT (XFS_AT_TYPE\|XFS_AT_MODE\|XFS_AT_UID\|XFS_AT_GID\|\
	164	XFS_AT_FSID\|XFS_AT_NODEID\|XFS_AT_NLINK\|XFS_AT_SIZE\|\
	165	XFS_AT_ATIME\|XFS_AT_MTIME\|XFS_AT_CTIME\|XFS_AT_RDEV\|\
	166	XFS_AT_BLKSIZE\|XFS_AT_NBLOCKS\|XFS_AT_PROJID)
	167
	168	#define XFS_AT_TIMES (XFS_AT_ATIME\|XFS_AT_MTIME\|XFS_AT_CTIME)
	169
	170	#define XFS_AT_UPDTIMES (XFS_AT_UPDATIME\|XFS_AT_UPDMTIME\|XFS_AT_UPDCTIME)
	171
	172	#define XFS_AT_NOSET (XFS_AT_NLINK\|XFS_AT_RDEV\|XFS_AT_FSID\|XFS_AT_NODEID\|\
	173	XFS_AT_TYPE\|XFS_AT_BLKSIZE\|XFS_AT_NBLOCKS\|XFS_AT_VCODE\|\
	174	XFS_AT_NEXTENTS\|XFS_AT_ANEXTENTS\|XFS_AT_GENCOUNT)
	175
	176	/*
	177	* Modes.
	178	*/
	179	#define VSUID S_ISUID /* set user id on execution */
	180	#define VSGID S_ISGID /* set group id on execution */
	181	#define VSVTX S_ISVTX /* save swapped text even after use */
	182	#define VREAD S_IRUSR /* read, write, execute permissions */
	183	#define VWRITE S_IWUSR
	184	#define VEXEC S_IXUSR
	185
186	#define MODEMASK S_IALLUGO /* mode bits plus permission bits */
187
188	/*
189	* Check whether mandatory file locking is enabled.
190	*/
191	#define MANDLOCK(vp, mode) \
0432dab2	192	(VN_ISREG(vp) && ((mode) & (VSGID\|(VEXEC>>3))) == VSGID)
1da177e4 LT	193
1da177e4 LT	194	extern void vn_init(void);
67fcaa73 NS	195	extern bhv_vnode_t vn_initialize(struct inode );
67fcaa73 NS	196	extern int vn_revalidate(struct bhv_vnode *);
8285fb58 NS	197	extern int __vn_revalidate(struct bhv_vnode , bhv_vattr_t );
8285fb58 NS	198	extern void vn_revalidate_core(struct bhv_vnode , bhv_vattr_t );
1da177e4	199
b677c210 CH	200	/*
	201	* Yeah, these don't take vnode anymore at all, all this should be
	202	* cleaned up at some point.
	203	*/
	204	extern void vn_iowait(struct xfs_inode *ip);
	205	extern void vn_iowake(struct xfs_inode *ip);
	206	extern void vn_ioerror(struct xfs_inode ip, int error, char f, int l);
7d04a335	207
67fcaa73	208	static inline int vn_count(struct bhv_vnode *vp)
1da177e4	209	{
ec86dc02	210	return atomic_read(&vn_to_inode(vp)->i_count);
1da177e4 LT	211	}
	212
	213	/*
	214	* Vnode reference counting functions (and macros for compatibility).
	215	*/
67fcaa73	216	extern bhv_vnode_t vn_hold(struct bhv_vnode );
1da177e4 LT	217
	218	#if defined(XFS_VNODE_TRACE)
	219	#define VN_HOLD(vp) \
	220	((void)vn_hold(vp), \
1543d79c	221	vn_trace_hold(xfs_vtoi(vp), __FILE__, __LINE__, (inst_t *)__return_address))
1da177e4	222	#define VN_RELE(vp) \
1543d79c	223	(vn_trace_rele(xfs_vtoi(vp), __FILE__, __LINE__, (inst_t *)__return_address), \
ec86dc02	224	iput(vn_to_inode(vp)))
1da177e4 LT	225	#else
1da177e4 LT	226	#define VN_HOLD(vp) ((void)vn_hold(vp))
ec86dc02	227	#define VN_RELE(vp) (iput(vn_to_inode(vp)))
1da177e4 LT	228	#endif
1da177e4 LT	229
67fcaa73	230	static inline struct bhv_vnode vn_grab(struct bhv_vnode vp)
cdb62687	231	{
ec86dc02 NS	232	struct inode *inode = igrab(vn_to_inode(vp));
ec86dc02 NS	233	return inode ? vn_from_inode(inode) : NULL;
cdb62687 CH	234	}
cdb62687 CH	235
1da177e4 LT	236	/*
	237	* Vname handling macros.
	238	*/
	239	#define VNAME(dentry) ((char *) (dentry)->d_name.name)
	240	#define VNAMELEN(dentry) ((dentry)->d_name.len)
ec86dc02	241	#define VNAME_TO_VNODE(dentry) (vn_from_inode((dentry)->d_inode))
1da177e4	242
1da177e4 LT	243	/*
	244	* Dealing with bad inodes
	245	*/
67fcaa73	246	static inline void vn_mark_bad(struct bhv_vnode *vp)
1da177e4	247	{
ec86dc02	248	make_bad_inode(vn_to_inode(vp));
1da177e4 LT	249	}
1da177e4 LT	250
67fcaa73	251	static inline int VN_BAD(struct bhv_vnode *vp)
1da177e4	252	{
ec86dc02	253	return is_bad_inode(vn_to_inode(vp));
1da177e4 LT	254	}
1da177e4 LT	255
ca5ccbf9 NS	256	/*
	257	* Extracting atime values in various formats
	258	*/
67fcaa73	259	static inline void vn_atime_to_bstime(bhv_vnode_t vp, xfs_bstime_t bs_atime)
ca5ccbf9 NS	260	{
	261	bs_atime->tv_sec = vp->v_inode.i_atime.tv_sec;
	262	bs_atime->tv_nsec = vp->v_inode.i_atime.tv_nsec;
	263	}
	264
67fcaa73	265	static inline void vn_atime_to_timespec(bhv_vnode_t vp, struct timespec ts)
ca5ccbf9 NS	266	{
	267	*ts = vp->v_inode.i_atime;
	268	}
	269
67fcaa73	270	static inline void vn_atime_to_time_t(bhv_vnode_t vp, time_t tt)
ca5ccbf9 NS	271	{
	272	*tt = vp->v_inode.i_atime.tv_sec;
	273	}
	274
1da177e4 LT	275	/*
	276	* Some useful predicates.
	277	*/
ec86dc02 NS	278	#define VN_MAPPED(vp) mapping_mapped(vn_to_inode(vp)->i_mapping)
	279	#define VN_CACHED(vp) (vn_to_inode(vp)->i_mapping->nrpages)
	280	#define VN_DIRTY(vp) mapping_tagged(vn_to_inode(vp)->i_mapping, \
1da177e4	281	PAGECACHE_TAG_DIRTY)
1da177e4 LT	282
1da177e4 LT	283	/*
67fcaa73	284	* Flags to vop_setattr/getattr.
1da177e4 LT	285	*/
	286	#define ATTR_UTIME 0x01 /* non-default utime(2) request */
	287	#define ATTR_DMI 0x08 /* invocation from a DMI function */
	288	#define ATTR_LAZY 0x80 /* set/get attributes lazily */
	289	#define ATTR_NONBLOCK 0x100 /* return EAGAIN if operation would block */
5fcbab35	290	#define ATTR_NOLOCK 0x200 /* Don't grab any conflicting locks */
1f730e3b	291	#define ATTR_NOSIZETOK 0x400 /* Don't get the SIZE token */
1da177e4 LT	292
1da177e4 LT	293	/*
67fcaa73	294	* Flags to vop_fsync/reclaim.
1da177e4 LT	295	*/
	296	#define FSYNC_NOWAIT 0 /* asynchronous flush */
	297	#define FSYNC_WAIT 0x1 /* synchronous fsync or forced reclaim */
	298	#define FSYNC_INVAL 0x2 /* flush and invalidate cached data */
	299	#define FSYNC_DATA 0x4 /* synchronous fsync of data only */
	300
	301	/*
	302	* Tracking vnode activity.
	303	*/
	304	#if defined(XFS_VNODE_TRACE)
	305
	306	#define VNODE_TRACE_SIZE 16 /* number of trace entries */
	307	#define VNODE_KTRACE_ENTRY 1
	308	#define VNODE_KTRACE_EXIT 2
	309	#define VNODE_KTRACE_HOLD 3
	310	#define VNODE_KTRACE_REF 4
	311	#define VNODE_KTRACE_RELE 5
	312
1543d79c CH	313	extern void vn_trace_entry(struct xfs_inode , const char , inst_t *);
	314	extern void vn_trace_exit(struct xfs_inode , const char , inst_t *);
	315	extern void vn_trace_hold(struct xfs_inode , char , int, inst_t *);
	316	extern void vn_trace_ref(struct xfs_inode , char , int, inst_t *);
	317	extern void vn_trace_rele(struct xfs_inode , char , int, inst_t *);
1da177e4 LT	318	#else
	319	#define vn_trace_entry(a,b,c)
	320	#define vn_trace_exit(a,b,c)
	321	#define vn_trace_hold(a,b,c,d)
	322	#define vn_trace_ref(a,b,c,d)
	323	#define vn_trace_rele(a,b,c,d)
1da177e4 LT	324	#endif
	325
	326	#endif /* __XFS_VNODE_H__ */