root/fs/ocfs2/dcache.h

INCLUDED FROM

/* -*- mode: c; c-basic-offset: 8; -*-
 * vim: noexpandtab sw=8 ts=8 sts=0:
 *
 * dcache.h
 *
 * Function prototypes
 *
 * Copyright (C) 2002, 2004 Oracle.  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; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This program 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; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 021110-1307, USA.
 */

#ifndef OCFS2_DCACHE_H
#define OCFS2_DCACHE_H

extern struct dentry_operations ocfs2_dentry_ops;

struct ocfs2_dentry_lock {
        unsigned int            dl_count;
        u64                     dl_parent_blkno;

        /*
         * The ocfs2_dentry_lock keeps an inode reference until
         * dl_lockres has been destroyed. This is usually done in
         * ->d_iput() anyway, so there should be minimal impact.
         */
        struct inode            *dl_inode;
        struct ocfs2_lock_res   dl_lockres;
};

int ocfs2_dentry_attach_lock(struct dentry *dentry, struct inode *inode,
                             u64 parent_blkno);

void ocfs2_dentry_lock_put(struct ocfs2_super *osb,
                           struct ocfs2_dentry_lock *dl);

struct dentry *ocfs2_find_local_alias(struct inode *inode, u64 parent_blkno,
                                      int skip_unhashed);

void ocfs2_dentry_move(struct dentry *dentry, struct dentry *target,
                       struct inode *old_dir, struct inode *new_dir);

extern spinlock_t dentry_attach_lock;

#endif /* OCFS2_DCACHE_H */