/* * Copyright (c) 2000-2003 Silicon Graphics, Inc.  All Rights Reserved. * * This program is free software; you can redistribute it and/or modify it * under the terms of version 2 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. * * Further, this software is distributed without any warranty that it is * free of the rightful claim of any third person regarding infringement * or the like.  Any license provided herein, whether implied or * otherwise, applies only to this software file.  Patent licenses, if * any, provided herein do not apply to combinations of this program with * other software, or any other product whatsoever. * * You should have received a copy of the GNU General Public License along * with this program; if not, write the Free Software Foundation, Inc., 59 * Temple Place - Suite 330, Boston MA 02111-1307, USA. * * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy, * Mountain View, CA  94043, or: * * http://www.sgi.com * * For further information regarding this notice, see: * * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/ * * Portions Copyright (c) 1989, 1993 *	The Regents of the University of California.  All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright *    notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright *    notice, this list of conditions and the following disclaimer in the *    documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors *    may be used to endorse or promote products derived from this software *    without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */#ifndef __XFS_VNODE_H__#define __XFS_VNODE_H__struct uio;struct file;struct vattr;struct xfs_iomap;struct attrlist_cursor_kern;/* * Vnode types.  VNON means no type. */enum vtype	{ VNON, VREG, VDIR, VBLK, VCHR, VLNK, VFIFO, VBAD, VSOCK };typedef xfs_ino_t vnumber_t;typedef struct dentry vname_t;typedef bhv_head_t vn_bhv_head_t;/* * MP locking protocols: *	v_flag, v_vfsp				VN_LOCK/VN_UNLOCK *	v_type					read-only or fs-dependent */typedef struct vnode {	__u32		v_flag;			/* vnode flags (see below) */	enum vtype	v_type;			/* vnode type */	struct vfs	*v_vfsp;		/* ptr to containing VFS */	vnumber_t	v_number;		/* in-core vnode number */	vn_bhv_head_t	v_bh;			/* behavior head */	spinlock_t	v_lock;			/* VN_LOCK/VN_UNLOCK */	struct inode	v_inode;		/* Linux inode */#ifdef XFS_VNODE_TRACE	struct ktrace	*v_trace;		/* trace header structure    */#endif} vnode_t;#define v_fbhv			v_bh.bh_first	       /* first behavior */#define v_fops			v_bh.bh_first->bd_ops  /* first behavior ops */#define VNODE_POSITION_BASE	BHV_POSITION_BASE	/* chain bottom */#define VNODE_POSITION_TOP	BHV_POSITION_TOP	/* chain top */#define VNODE_POSITION_INVALID	BHV_POSITION_INVALID	/* invalid pos. num */typedef enum {	VN_BHV_UNKNOWN,		/* not specified */	VN_BHV_XFS,		/* xfs */	VN_BHV_DM,		/* data migration */	VN_BHV_QM,		/* quota manager */	VN_BHV_IO,		/* IO path */	VN_BHV_END		/* housekeeping end-of-range */} vn_bhv_t;#define VNODE_POSITION_XFS	(VNODE_POSITION_BASE)#define VNODE_POSITION_DM	(VNODE_POSITION_BASE+10)#define VNODE_POSITION_QM	(VNODE_POSITION_BASE+20)#define VNODE_POSITION_IO	(VNODE_POSITION_BASE+30)/* * Macros for dealing with the behavior descriptor inside of the vnode. */#define BHV_TO_VNODE(bdp)	((vnode_t *)BHV_VOBJ(bdp))#define BHV_TO_VNODE_NULL(bdp)	((vnode_t *)BHV_VOBJNULL(bdp))#define VN_BHV_HEAD(vp)			((bhv_head_t *)(&((vp)->v_bh)))#define vn_bhv_head_init(bhp,name)	bhv_head_init(bhp,name)#define vn_bhv_remove(bhp,bdp)		bhv_remove(bhp,bdp)#define vn_bhv_lookup(bhp,ops)		bhv_lookup(bhp,ops)#define vn_bhv_lookup_unlocked(bhp,ops) bhv_lookup_unlocked(bhp,ops)/* * Vnode to Linux inode mapping. */#define LINVFS_GET_VP(inode)	((vnode_t *)list_entry(inode, vnode_t, v_inode))#define LINVFS_GET_IP(vp)	(&(vp)->v_inode)/* * Convert between vnode types and inode formats (since POSIX.1 * defines mode word of stat structure in terms of inode formats). */extern enum vtype	iftovt_tab[];extern u_short		vttoif_tab[];#define IFTOVT(mode)	(iftovt_tab[((mode) & S_IFMT) >> 12])#define VTTOIF(indx)	(vttoif_tab[(int)(indx)])#define MAKEIMODE(indx, mode)	(int)(VTTOIF(indx) | (mode))/* * Vnode flags. */#define VINACT		       0x1	/* vnode is being inactivated	*/#define VRECLM		       0x2	/* vnode is being reclaimed	*/#define VWAIT		       0x4	/* waiting for VINACT/VRECLM to end */#define VMODIFIED	       0x8	/* XFS inode state possibly differs */					/* to the Linux inode state.	*//* * Values for the VOP_RWLOCK and VOP_RWUNLOCK flags parameter. */typedef enum vrwlock {	VRWLOCK_NONE,	VRWLOCK_READ,	VRWLOCK_WRITE,	VRWLOCK_WRITE_DIRECT,	VRWLOCK_TRY_READ,	VRWLOCK_TRY_WRITE} vrwlock_t;/* * Return values for VOP_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/* * Values for the cmd code given to VOP_VNODE_CHANGE. */typedef enum vchange {	VCHANGE_FLAGS_FRLOCKS		= 0,	VCHANGE_FLAGS_ENF_LOCKING	= 1,	VCHANGE_FLAGS_TRUNCATED		= 2,	VCHANGE_FLAGS_PAGE_DIRTY	= 3,	VCHANGE_FLAGS_IOEXCL_COUNT	= 4} vchange_t;typedef int	(*vop_open_t)(bhv_desc_t *, struct cred *);typedef ssize_t (*vop_read_t)(bhv_desc_t *, struct kiocb *,				const struct iovec *, unsigned int,				loff_t *, int, struct cred *);typedef ssize_t (*vop_write_t)(bhv_desc_t *, struct kiocb *,				const struct iovec *, unsigned int,				loff_t *, int, struct cred *);typedef ssize_t (*vop_sendfile_t)(bhv_desc_t *, struct file *,				loff_t *, int, size_t, read_actor_t,				void *, struct cred *);typedef int	(*vop_ioctl_t)(bhv_desc_t *, struct inode *, struct file *,				int, unsigned int, unsigned long);typedef int	(*vop_getattr_t)(bhv_desc_t *, struct vattr *, int,				struct cred *);typedef int	(*vop_setattr_t)(bhv_desc_t *, struct vattr *, int,				struct cred *);typedef int	(*vop_access_t)(bhv_desc_t *, int, struct cred *);typedef int	(*vop_lookup_t)(bhv_desc_t *, vname_t *, vnode_t **,				int, vnode_t *, struct cred *);typedef int	(*vop_create_t)(bhv_desc_t *, vname_t *, struct vattr *,				vnode_t **, struct cred *);typedef int	(*vop_remove_t)(bhv_desc_t *, vname_t *, struct cred *);typedef int	(*vop_link_t)(bhv_desc_t *, vnode_t *, vname_t *,				struct cred *);typedef int	(*vop_rename_t)(bhv_desc_t *, vname_t *, vnode_t *, vname_t *,				struct cred *);typedef int	(*vop_mkdir_t)(bhv_desc_t *, vname_t *, struct vattr *,				vnode_t **, struct cred *);typedef int	(*vop_rmdir_t)(bhv_desc_t *, vname_t *, struct cred *);typedef int	(*vop_readdir_t)(bhv_desc_t *, struct uio *, struct cred *,				int *);typedef int	(*vop_symlink_t)(bhv_desc_t *, vname_t *, struct vattr *,				char *, vnode_t **, struct cred *);typedef int	(*vop_readlink_t)(bhv_desc_t *, struct uio *, int,				struct cred *);typedef int	(*vop_fsync_t)(bhv_desc_t *, int, struct cred *,				xfs_off_t, xfs_off_t);typedef int	(*vop_inactive_t)(bhv_desc_t *, struct cred *);typedef int	(*vop_fid2_t)(bhv_desc_t *, struct fid *);typedef int	(*vop_release_t)(bhv_desc_t *);typedef int	(*vop_rwlock_t)(bhv_desc_t *, vrwlock_t);typedef void	(*vop_rwunlock_t)(bhv_desc_t *, vrwlock_t);typedef int	(*vop_bmap_t)(bhv_desc_t *, xfs_off_t, ssize_t, int,				struct xfs_iomap *, int *);typedef int	(*vop_reclaim_t)(bhv_desc_t *);typedef int	(*vop_attr_get_t)(bhv_desc_t *, char *, char *, int *, int,				struct cred *);typedef	int	(*vop_attr_set_t)(bhv_desc_t *, char *, char *, int, int,				struct cred *);typedef	int	(*vop_attr_remove_t)(bhv_desc_t *, char *, int, struct cred *);typedef	int	(*vop_attr_list_t)(bhv_desc_t *, char *, int, int,				struct attrlist_cursor_kern *, struct cred *);typedef void	(*vop_link_removed_t)(bhv_desc_t *, vnode_t *, int);typedef void	(*vop_vnode_change_t)(bhv_desc_t *, vchange_t, __psint_t);typedef void	(*vop_ptossvp_t)(bhv_desc_t *, xfs_off_t, xfs_off_t, int);typedef void	(*vop_pflushinvalvp_t)(bhv_desc_t *, xfs_off_t, xfs_off_t, int);typedef int	(*vop_pflushvp_t)(bhv_desc_t *, xfs_off_t, xfs_off_t,				uint64_t, int);typedef int	(*vop_iflush_t)(bhv_desc_t *, int);typedef struct vnodeops {	bhv_position_t  vn_position;    /* position within behavior chain */	vop_open_t		vop_open;	vop_read_t		vop_read;	vop_write_t		vop_write;	vop_sendfile_t		vop_sendfile;	vop_ioctl_t		vop_ioctl;	vop_getattr_t		vop_getattr;	vop_setattr_t		vop_setattr;	vop_access_t		vop_access;	vop_lookup_t		vop_lookup;	vop_create_t		vop_create;	vop_remove_t		vop_remove;	vop_link_t		vop_link;	vop_rename_t		vop_rename;	vop_mkdir_t		vop_mkdir;	vop_rmdir_t		vop_rmdir;	vop_readdir_t		vop_readdir;	vop_symlink_t		vop_symlink;	vop_readlink_t		vop_readlink;	vop_fsync_t		vop_fsync;	vop_inactive_t		vop_inactive;	vop_fid2_t		vop_fid2;	vop_rwlock_t		vop_rwlock;	vop_rwunlock_t		vop_rwunlock;	vop_bmap_t		vop_bmap;	vop_reclaim_t		vop_reclaim;	vop_attr_get_t		vop_attr_get;	vop_attr_set_t		vop_attr_set;	vop_attr_remove_t	vop_attr_remove;	vop_attr_list_t		vop_attr_list;	vop_link_removed_t	vop_link_removed;	vop_vnode_change_t	vop_vnode_change;	vop_ptossvp_t		vop_tosspages;	vop_pflushinvalvp_t	vop_flushinval_pages;	vop_pflushvp_t		vop_flush_pages;	vop_release_t		vop_release;	vop_iflush_t		vop_iflush;} vnodeops_t;/* * VOP's. */#define _VOP_(op, vp)	(*((vnodeops_t *)(vp)->v_fops)->op)#define VOP_READ(vp,file,iov,segs,offset,ioflags,cr,rv)			\	rv = _VOP_(vop_read, vp)((vp)->v_fbhv,file,iov,segs,offset,ioflags,cr)#define VOP_WRITE(vp,file,iov,segs,offset,ioflags,cr,rv)		\	rv = _VOP_(vop_write, vp)((vp)->v_fbhv,file,iov,segs,offset,ioflags,cr)#define VOP_SENDFILE(vp,f,off,ioflags,cnt,act,targ,cr,rv)		\	rv = _VOP_(vop_sendfile, vp)((vp)->v_fbhv,f,off,ioflags,cnt,act,targ,cr)#define VOP_BMAP(vp,of,sz,rw,b,n,rv)					\	rv = _VOP_(vop_bmap, vp)((vp)->v_fbhv,of,sz,rw,b,n)#define VOP_OPEN(vp, cr, rv)						\	rv = _VOP_(vop_open, vp)((vp)->v_fbhv, cr)#define VOP_GETATTR(vp, vap, f, cr, rv)					\	rv = _VOP_(vop_getattr, vp)((vp)->v_fbhv, vap, f, cr)#define	VOP_SETATTR(vp, vap, f, cr, rv)					\	rv = _VOP_(vop_setattr, vp)((vp)->v_fbhv, vap, f, cr)#define	VOP_ACCESS(vp, mode, cr, rv)					\	rv = _VOP_(vop_access, vp)((vp)->v_fbhv, mode, cr)#define	VOP_LOOKUP(vp,d,vpp,f,rdir,cr,rv)				\	rv = _VOP_(vop_lookup, vp)((vp)->v_fbhv,d,vpp,f,rdir,cr)#define VOP_CREATE(dvp,d,vap,vpp,cr,rv)					\	rv = _VOP_(vop_create, dvp)((dvp)->v_fbhv,d,vap,vpp,cr)#define VOP_REMOVE(dvp,d,cr,rv)						\	rv = _VOP_(vop_remove, dvp)((dvp)->v_fbhv,d,cr)#define	VOP_LINK(tdvp,fvp,d,cr,rv)					\	rv = _VOP_(vop_link, tdvp)((tdvp)->v_fbhv,fvp,d,cr)#define	VOP_RENAME(fvp,fnm,tdvp,tnm,cr,rv)				\	rv = _VOP_(vop_rename, fvp)((fvp)->v_fbhv,fnm,tdvp,tnm,cr)#define	VOP_MKDIR(dp,d,vap,vpp,cr,rv)					\	rv = _VOP_(vop_mkdir, dp)((dp)->v_fbhv,d,vap,vpp,cr)#define	VOP_RMDIR(dp,d,cr,rv)	 					\	rv = _VOP_(vop_rmdir, dp)((dp)->v_fbhv,d,cr)#define	VOP_READDIR(vp,uiop,cr,eofp,rv)					\	rv = _VOP_(vop_readdir, vp)((vp)->v_fbhv,uiop,cr,eofp)#define	VOP_SYMLINK(dvp,d,vap,tnm,vpp,cr,rv)				\	rv = _VOP_(vop_symlink, dvp) ((dvp)->v_fbhv,d,vap,tnm,vpp,cr)#define	VOP_READLINK(vp,uiop,fl,cr,rv)					\