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
  29 extern const struct dentry_operations ocfs2_dentry_ops;
  30
  31 struct ocfs2_dentry_lock {
  32         /* Use count of dentry lock */
  33         unsigned int            dl_count;
  34         union {
  35                 /* Linked list of dentry locks to release */
  36                 struct ocfs2_dentry_lock *dl_next;
  37                 u64                     dl_parent_blkno;
  38         };
  39
  40         /*
  41          * The ocfs2_dentry_lock keeps an inode reference until
  42          * dl_lockres has been destroyed. This is usually done in
  43          * ->d_iput() anyway, so there should be minimal impact.
  44          */
  45         struct inode            *dl_inode;
  46         struct ocfs2_lock_res   dl_lockres;
  47 };
  48
  49 int ocfs2_dentry_attach_lock(struct dentry *dentry, struct inode *inode,
  50                              u64 parent_blkno);
  51
  52 void ocfs2_dentry_lock_put(struct ocfs2_super *osb,
  53                            struct ocfs2_dentry_lock *dl);
  54
  55 void ocfs2_drop_dl_inodes(struct work_struct *work);
  56
  57 struct dentry *ocfs2_find_local_alias(struct inode *inode, u64 parent_blkno,
  58                                       int skip_unhashed);
  59
  60 void ocfs2_dentry_move(struct dentry *dentry, struct dentry *target,
  61                        struct inode *old_dir, struct inode *new_dir);
  62
  63 extern spinlock_t dentry_attach_lock;
  64
  65 #endif /* OCFS2_DCACHE_H */