index.h

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/*
 * index.h - Defines for NTFS kernel index handling.  Part of the Linux-NTFS
 *       project.
 *
 * Copyright (c) 2004 Anton Altaparmakov
 *
 * This program/include file 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; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program/include file is distributed in the hope that it will 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 (in the main directory of the Linux-NTFS
 * distribution in the file COPYING); if not, write to the Free Software
 * Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#ifndef _LINUX_NTFS_INDEX_H
#define _LINUX_NTFS_INDEX_H

#include <linux/fs.h>

#include "types.h"
#include "layout.h"
#include "inode.h"
#include "attrib.h"
#include "mft.h"
#include "aops.h"

typedef struct {
    ntfs_inode *idx_ni;
    INDEX_ENTRY *entry;
    void *data;
    u16 data_len;
    bool is_in_root;
    INDEX_ROOT *ir;
    ntfs_attr_search_ctx *actx;
    ntfs_inode *base_ni;
    INDEX_ALLOCATION *ia;
    struct page *page;
} ntfs_index_context;

extern ntfs_index_context *ntfs_index_ctx_get(ntfs_inode *idx_ni);
extern void ntfs_index_ctx_put(ntfs_index_context *ictx);

extern int ntfs_index_lookup(const void *key, const int key_len,
        ntfs_index_context *ictx);

#ifdef NTFS_RW

static inline void ntfs_index_entry_flush_dcache_page(ntfs_index_context *ictx)
{
    if (ictx->is_in_root)
        flush_dcache_mft_record_page(ictx->actx->ntfs_ino);
    else
        flush_dcache_page(ictx->page);
}

static inline void ntfs_index_entry_mark_dirty(ntfs_index_context *ictx)
{
    if (ictx->is_in_root)
        mark_mft_record_dirty(ictx->actx->ntfs_ino);
    else
        mark_ntfs_record_dirty(ictx->page,
                (u8*)ictx->ia - (u8*)page_address(ictx->page));
}

#endif /* NTFS_RW */

#endif /* _LINUX_NTFS_INDEX_H */