LXR linux/fs/ocfs2/dcache.h

   1/* -*- mode: c; c-basic-offset: 8; -*-
   2 * vim: noexpandtab sw=8 ts=8 sts=0:
   3 *
   4 * dcache.h
   5 *
   6 * Function prototypes
   7 *
   8 * Copyright (C) 2002, 2004 Oracle.  All rights reserved.
   9 *
  10 * This program is free software; you can redistribute it and/or
  11 * modify it under the terms of the GNU General Public
  12 * License as published by the Free Software Foundation; either
  13 * version 2 of the License, or (at your option) any later version.
  14 *
  15 * This program is distributed in the hope that it will be useful,
  16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  18 * General Public License for more details.
  19 *
  20 * You should have received a copy of the GNU General Public
  21 * License along with this program; if not, write to the
  22 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  23 * Boston, MA 021110-1307, USA.
  24 */
  25
  26#ifndef OCFS2_DCACHE_H
  27#define OCFS2_DCACHE_H
  28
  29extern struct dentry_operations ocfs2_dentry_ops;
  30
  31struct ocfs2_dentry_lock {
  32        unsigned int            dl_count;
  33        u64                     dl_parent_blkno;
  34
  35        /*
  36         * The ocfs2_dentry_lock keeps an inode reference until
  37         * dl_lockres has been destroyed. This is usually done in
  38         * ->d_iput() anyway, so there should be minimal impact.
  39         */
  40        struct inode            *dl_inode;
  41        struct ocfs2_lock_res   dl_lockres;
  42};
  43
  44int ocfs2_dentry_attach_lock(struct dentry *dentry, struct inode *inode,
  45                             u64 parent_blkno);
  46
  47void ocfs2_dentry_lock_put(struct ocfs2_super *osb,
  48                           struct ocfs2_dentry_lock *dl);
  49
  50struct dentry *ocfs2_find_local_alias(struct inode *inode, u64 parent_blkno,
  51                                      int skip_unhashed);
  52
  53void ocfs2_dentry_move(struct dentry *dentry, struct dentry *target,
  54                       struct inode *old_dir, struct inode *new_dir);
  55
  56extern spinlock_t dentry_attach_lock;
  57
  58#endif /* OCFS2_DCACHE_H */
  59