xfs_vnode.h

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/*
 * 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__ */