xfs_vnode.h

linux-2.6.15.6

	_VOP_(vop_rwlock, vp)((vp)->v_fbhv, i)
#define VOP_RWUNLOCK(vp,i)						\
	(void)_VOP_(vop_rwunlock, vp)((vp)->v_fbhv, i)
#define VOP_FRLOCK(vp,c,fl,flags,offset,fr,rv)				\
	rv = _VOP_(vop_frlock, vp)((vp)->v_fbhv,c,fl,flags,offset,fr)
#define VOP_RECLAIM(vp, rv)						\
	rv = _VOP_(vop_reclaim, vp)((vp)->v_fbhv)
#define VOP_ATTR_GET(vp, name, val, vallenp, fl, cred, rv)		\
	rv = _VOP_(vop_attr_get, vp)((vp)->v_fbhv,name,val,vallenp,fl,cred)
#define	VOP_ATTR_SET(vp, name, val, vallen, fl, cred, rv)		\
	rv = _VOP_(vop_attr_set, vp)((vp)->v_fbhv,name,val,vallen,fl,cred)
#define	VOP_ATTR_REMOVE(vp, name, flags, cred, rv)			\
	rv = _VOP_(vop_attr_remove, vp)((vp)->v_fbhv,name,flags,cred)
#define	VOP_ATTR_LIST(vp, buf, buflen, fl, cursor, cred, rv)		\
	rv = _VOP_(vop_attr_list, vp)((vp)->v_fbhv,buf,buflen,fl,cursor,cred)
#define VOP_LINK_REMOVED(vp, dvp, linkzero)				\
	(void)_VOP_(vop_link_removed, vp)((vp)->v_fbhv, dvp, linkzero)
#define VOP_VNODE_CHANGE(vp, cmd, val)					\
	(void)_VOP_(vop_vnode_change, vp)((vp)->v_fbhv,cmd,val)
/*
 * These are page cache functions that now go thru VOPs.
 * 'last' parameter is unused and left in for IRIX compatibility
 */
#define VOP_TOSS_PAGES(vp, first, last, fiopt)				\
	_VOP_(vop_tosspages, vp)((vp)->v_fbhv,first, last, fiopt)
/*
 * 'last' parameter is unused and left in for IRIX compatibility
 */
#define VOP_FLUSHINVAL_PAGES(vp, first, last, fiopt)			\
	_VOP_(vop_flushinval_pages, vp)((vp)->v_fbhv,first,last,fiopt)
/*
 * 'last' parameter is unused and left in for IRIX compatibility
 */
#define VOP_FLUSH_PAGES(vp, first, last, flags, fiopt, rv)		\
	rv = _VOP_(vop_flush_pages, vp)((vp)->v_fbhv,first,last,flags,fiopt)
#define VOP_IOCTL(vp, inode, filp, fl, cmd, arg, rv)			\
	rv = _VOP_(vop_ioctl, vp)((vp)->v_fbhv,inode,filp,fl,cmd,arg)
#define VOP_IFLUSH(vp, flags, rv)					\
	rv = _VOP_(vop_iflush, vp)((vp)->v_fbhv, flags)

/*
 * 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_PAGES, VOP_FLUSHINVAL_PAGES and
 *	VOP_FLUSH_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 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 */
} 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 vnode_t	*vn_initialize(struct inode *);

/*
 * vnode_map structures _must_ match vn_epoch and vnode structure sizes.
 */
typedef struct vnode_map {
	vfs_t		*v_vfsp;
	vnumber_t	v_number;		/* in-core vnode number */
	xfs_ino_t	v_ino;			/* inode #	*/
} vmap_t;

#define VMAP(vp, vmap)	{(vmap).v_vfsp	 = (vp)->v_vfsp,	\
			 (vmap).v_number = (vp)->v_number,	\
			 (vmap).v_ino	 = (vp)->v_inode.i_ino; }

extern int	vn_revalidate(struct vnode *);
extern void	vn_revalidate_core(struct vnode *, vattr_t *);

extern void	vn_iowait(struct vnode *vp);
extern void	vn_iowake(struct vnode *vp);

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

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

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

static inline struct vnode *vn_grab(struct vnode *vp)
{
	struct inode *inode = igrab(LINVFS_GET_IP(vp));
	return inode ? LINVFS_GET_VP(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)	(LINVFS_GET_VP((dentry)->d_inode))

/*
 * Vnode spinlock manipulation.
 */
#define VN_LOCK(vp)		mutex_spinlock(&(vp)->v_lock)
#define VN_UNLOCK(vp, s)	mutex_spinunlock(&(vp)->v_lock, s)
#define VN_FLAGSET(vp,b)	vn_flagset(vp,b)
#define VN_FLAGCLR(vp,b)	vn_flagclr(vp,b)

static __inline__ void vn_flagset(struct vnode *vp, uint flag)
{
	spin_lock(&vp->v_lock);
	vp->v_flag |= flag;
	spin_unlock(&vp->v_lock);
}

static __inline__ void vn_flagclr(struct vnode *vp, uint flag)
{
	spin_lock(&vp->v_lock);
	vp->v_flag &= ~flag;
	spin_unlock(&vp->v_lock);
}

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

static inline int VN_BAD(struct vnode *vp)
{
	return is_bad_inode(LINVFS_GET_IP(vp));
}

/*
 * Some useful predicates.
 */
#define VN_MAPPED(vp)	mapping_mapped(LINVFS_GET_IP(vp)->i_mapping)
#define VN_CACHED(vp)	(LINVFS_GET_IP(vp)->i_mapping->nrpages)
#define VN_DIRTY(vp)	mapping_tagged(LINVFS_GET_IP(vp)->i_mapping, \
					PAGECACHE_TAG_DIRTY)
#define VMODIFY(vp)	VN_FLAGSET(vp, VMODIFIED)
#define VUNMODIFY(vp)	VN_FLAGCLR(vp, VMODIFIED)

/*
 * Flags to VOP_SETATTR/VOP_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 and VOP_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 vnode *, const char *, inst_t *);
extern void vn_trace_exit(struct vnode *, const char *, inst_t *);
extern void vn_trace_hold(struct vnode *, char *, int, inst_t *);
extern void vn_trace_ref(struct vnode *, char *, int, inst_t *);
extern void vn_trace_rele(struct vnode *, char *, int, inst_t *);

#define	VN_TRACE(vp)		\
	vn_trace_ref(vp, __FILE__, __LINE__, (inst_t *)__return_address)
#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)
#define	VN_TRACE(vp)
#endif

#endif	/* __XFS_VNODE_H__ */