fs/ocfs2/dir.h

   1 /* -*- mode: c; c-basic-offset: 8; -*-
   2  * vim: noexpandtab sw=8 ts=8 sts=0:
   3  *
   4  * dir.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_DIR_H
  27 #define OCFS2_DIR_H
  28
  29 struct ocfs2_dx_hinfo {
  30         u32     major_hash;
  31         u32     minor_hash;
  32 };
  33
  34 struct ocfs2_dir_lookup_result {
  35         struct buffer_head              *dl_leaf_bh;    /* Unindexed leaf
  36                                                          * block */
  37         struct ocfs2_dir_entry          *dl_entry;      /* Target dirent in
  38                                                          * unindexed leaf */
  39
  40         struct buffer_head              *dl_dx_root_bh; /* Root of indexed
  41                                                          * tree */
  42         struct buffer_head              *dl_dx_leaf_bh; /* Indexed leaf block */
  43         struct ocfs2_dx_entry           *dl_dx_entry;   /* Target dx_entry in
  44                                                          * indexed leaf */
  45         struct ocfs2_dx_hinfo           dl_hinfo;       /* Name hash results */
  46 };
  47 void ocfs2_free_dir_lookup_result(struct ocfs2_dir_lookup_result *res);
  48
  49 int ocfs2_find_entry(const char *name, int namelen,
  50                      struct inode *dir,
  51                      struct ocfs2_dir_lookup_result *lookup);
  52 int ocfs2_delete_entry(handle_t *handle,
  53                        struct inode *dir,
  54                        struct ocfs2_dir_lookup_result *res);
  55 int __ocfs2_add_entry(handle_t *handle,
  56                       struct inode *dir,
  57                       const char *name, int namelen,
  58                       struct inode *inode, u64 blkno,
  59                       struct buffer_head *parent_fe_bh,
  60                       struct ocfs2_dir_lookup_result *lookup);
  61 static inline int ocfs2_add_entry(handle_t *handle,
  62                                   struct dentry *dentry,
  63                                   struct inode *inode, u64 blkno,
  64                                   struct buffer_head *parent_fe_bh,
  65                                   struct ocfs2_dir_lookup_result *lookup)
  66 {
  67         return __ocfs2_add_entry(handle, dentry->d_parent->d_inode,
  68                                  dentry->d_name.name, dentry->d_name.len,
  69                                  inode, blkno, parent_fe_bh, lookup);
  70 }
  71 int ocfs2_update_entry(struct inode *dir, handle_t *handle,
  72                        struct ocfs2_dir_lookup_result *res,
  73                        struct inode *new_entry_inode);
  74
  75 int ocfs2_check_dir_for_entry(struct inode *dir,
  76                               const char *name,
  77                               int namelen);
  78 int ocfs2_empty_dir(struct inode *inode);
  79
  80 int ocfs2_find_files_on_disk(const char *name,
  81                              int namelen,
  82                              u64 *blkno,
  83                              struct inode *inode,
  84                              struct ocfs2_dir_lookup_result *res);
  85 int ocfs2_lookup_ino_from_name(struct inode *dir, const char *name,
  86                                int namelen, u64 *blkno);
  87 int ocfs2_readdir(struct file *filp, void *dirent, filldir_t filldir);
  88 int ocfs2_dir_foreach(struct inode *inode, loff_t *f_pos, void *priv,
  89                       filldir_t filldir);
  90 int ocfs2_prepare_dir_for_insert(struct ocfs2_super *osb,
  91                                  struct inode *dir,
  92                                  struct buffer_head *parent_fe_bh,
  93                                  const char *name,
  94                                  int namelen,
  95                                  struct ocfs2_dir_lookup_result *lookup);
  96 struct ocfs2_alloc_context;
  97 int ocfs2_fill_new_dir(struct ocfs2_super *osb,
  98                        handle_t *handle,
  99                        struct inode *parent,
 100                        struct inode *inode,
 101                        struct buffer_head *fe_bh,
 102                        struct ocfs2_alloc_context *data_ac,
 103                        struct ocfs2_alloc_context *meta_ac);
 104
 105 int ocfs2_dx_dir_truncate(struct inode *dir, struct buffer_head *di_bh);
 106
 107 struct ocfs2_dir_block_trailer *ocfs2_dir_trailer_from_size(int blocksize,
 108                                                             void *data);
 109 #endif /* OCFS2_DIR_H */