[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__

#include "xfs_fs.h"

struct file;
struct xfs_inode;
struct xfs_iomap;
struct attrlist_cursor_kern;

/*
 * 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_ISDIRECT	0x00004		/* bypass page cache */
#define IO_INVIS	0x00020		/* don't update inode timestamps */

#define XFS_IO_FLAGS \
	{ IO_ISDIRECT,	"DIRECT" }, \
	{ IO_INVIS,	"INVIS"}

/*
 * 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. */

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


#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
2b5decd0 CH	21	#include "xfs_fs.h"
2b5decd0 CH	22
1da177e4	23	struct file;
2b5decd0	24	struct xfs_inode;
1da177e4 LT	25	struct xfs_iomap;
	26	struct attrlist_cursor_kern;
	27
1da177e4	28	/*
739bfb2a	29	* Return values for xfs_inactive. A return value of
1da177e4 LT	30	* VN_INACTIVE_NOCACHE implies that the file system behavior
	31	* has disassociated its state and bhv_desc_t from the vnode.
	32	*/
	33	#define VN_INACTIVE_CACHE 0
	34	#define VN_INACTIVE_NOCACHE 1
	35
1da177e4 LT	36	/*
	37	* Flags for read/write calls - same values as IRIX
	38	*/
1da177e4 LT	39	#define IO_ISDIRECT 0x00004 /* bypass page cache */
	40	#define IO_INVIS 0x00020 /* don't update inode timestamps */
	41
0b1b213f CH	42	#define XFS_IO_FLAGS \
	43	{ IO_ISDIRECT, "DIRECT" }, \
	44	{ IO_INVIS, "INVIS"}
	45
1da177e4	46	/*
67fcaa73	47	* Flush/Invalidate options for vop_toss/flush/flushinval_pages.
1da177e4 LT	48	*/
	49	#define FI_NONE 0 /* none */
	50	#define FI_REMAPF 1 /* Do a remapf prior to the operation */
	51	#define FI_REMAPF_LOCKED 2 /* Do a remapf prior to the operation.
	52	Prevent VM access to the pages until
	53	the operation completes. */
	54
1da177e4 LT	55	/*
	56	* Some useful predicates.
	57	*/
863890cd CH	58	#define VN_MAPPED(vp) mapping_mapped(vp->i_mapping)
	59	#define VN_CACHED(vp) (vp->i_mapping->nrpages)
	60	#define VN_DIRTY(vp) mapping_tagged(vp->i_mapping, \
1da177e4	61	PAGECACHE_TAG_DIRTY)
1da177e4	62
1da177e4	63
1da177e4	64	#endif /* __XFS_VNODE_H__ */