[GitHub/mt8127/android_kernel_alcatel_ttab.git] / fs / xfs / 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 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
	1	/*
	2	* Copyright (c) 2000-2005 Silicon Graphics, Inc.
	3	* All Rights Reserved.
	4	*
	5	* This program is free software; you can redistribute it and/or
	6	* modify it under the terms of the GNU General Public License as
	7	* published by the Free Software Foundation.
	8	*
	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.
	13	*
	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
	17	*/
	18	#ifndef __XFS_VNODE_H__
	19	#define __XFS_VNODE_H__
	20
	21	#include "xfs_fs.h"
	22
	23	struct file;
	24	struct xfs_inode;
	25	struct attrlist_cursor_kern;
	26
	27	/*
	28	* Return values for xfs_inactive. A return value of
	29	* VN_INACTIVE_NOCACHE implies that the file system behavior
	30	* has disassociated its state and bhv_desc_t from the vnode.
	31	*/
	32	#define VN_INACTIVE_CACHE 0
	33	#define VN_INACTIVE_NOCACHE 1
	34
	35	/*
	36	* Flags for read/write calls - same values as IRIX
	37	*/
	38	#define IO_ISDIRECT 0x00004 /* bypass page cache */
	39	#define IO_INVIS 0x00020 /* don't update inode timestamps */
	40
	41	#define XFS_IO_FLAGS \
	42	{ IO_ISDIRECT, "DIRECT" }, \
	43	{ IO_INVIS, "INVIS"}
	44
	45	/*
	46	* Flush/Invalidate options for vop_toss/flush/flushinval_pages.
	47	*/
	48	#define FI_NONE 0 /* none */
	49	#define FI_REMAPF 1 /* Do a remapf prior to the operation */
	50	#define FI_REMAPF_LOCKED 2 /* Do a remapf prior to the operation.
	51	Prevent VM access to the pages until
	52	the operation completes. */
	53
	54	/*
	55	* Some useful predicates.
	56	*/
	57	#define VN_MAPPED(vp) mapping_mapped(vp->i_mapping)
	58	#define VN_CACHED(vp) (vp->i_mapping->nrpages)
	59	#define VN_DIRTY(vp) mapping_tagged(vp->i_mapping, \
	60	PAGECACHE_TAG_DIRTY)
	61
	62
	63	#endif /* __XFS_VNODE_H__ */