LXR linux/fs/ocfs2/dir.h

   1/* SPDX-License-Identifier: GPL-2.0-or-later */
   2/*
   3 * dir.h
   4 *
   5 * Function prototypes
   6 *
   7 * Copyright (C) 2002, 2004 Oracle.  All rights reserved.
   8 */
   9
  10#ifndef OCFS2_DIR_H
  11#define OCFS2_DIR_H
  12
  13struct ocfs2_dx_hinfo {
  14        u32     major_hash;
  15        u32     minor_hash;
  16};
  17
  18struct ocfs2_dir_lookup_result {
  19        struct buffer_head              *dl_leaf_bh;    /* Unindexed leaf
  20                                                         * block */
  21        struct ocfs2_dir_entry          *dl_entry;      /* Target dirent in
  22                                                         * unindexed leaf */
  23
  24        struct buffer_head              *dl_dx_root_bh; /* Root of indexed
  25                                                         * tree */
  26
  27        struct buffer_head              *dl_dx_leaf_bh; /* Indexed leaf block */
  28        struct ocfs2_dx_entry           *dl_dx_entry;   /* Target dx_entry in
  29                                                         * indexed leaf */
  30        struct ocfs2_dx_hinfo           dl_hinfo;       /* Name hash results */
  31
  32        struct buffer_head              *dl_prev_leaf_bh;/* Previous entry in
  33                                                          * dir free space
  34                                                          * list. NULL if
  35                                                          * previous entry is
  36                                                          * dx root block. */
  37};
  38
  39void ocfs2_free_dir_lookup_result(struct ocfs2_dir_lookup_result *res);
  40
  41int ocfs2_find_entry(const char *name, int namelen,
  42                     struct inode *dir,
  43                     struct ocfs2_dir_lookup_result *lookup);
  44int ocfs2_delete_entry(handle_t *handle,
  45                       struct inode *dir,
  46                       struct ocfs2_dir_lookup_result *res);
  47int __ocfs2_add_entry(handle_t *handle,
  48                      struct inode *dir,
  49                      const char *name, int namelen,
  50                      struct inode *inode, u64 blkno,
  51                      struct buffer_head *parent_fe_bh,
  52                      struct ocfs2_dir_lookup_result *lookup);
  53static inline int ocfs2_add_entry(handle_t *handle,
  54                                  struct dentry *dentry,
  55                                  struct inode *inode, u64 blkno,
  56                                  struct buffer_head *parent_fe_bh,
  57                                  struct ocfs2_dir_lookup_result *lookup)
  58{
  59        return __ocfs2_add_entry(handle, d_inode(dentry->d_parent),
  60                                 dentry->d_name.name, dentry->d_name.len,
  61                                 inode, blkno, parent_fe_bh, lookup);
  62}
  63int ocfs2_update_entry(struct inode *dir, handle_t *handle,
  64                       struct ocfs2_dir_lookup_result *res,
  65                       struct inode *new_entry_inode);
  66
  67int ocfs2_check_dir_for_entry(struct inode *dir,
  68                              const char *name,
  69                              int namelen);
  70int ocfs2_empty_dir(struct inode *inode);
  71
  72int ocfs2_find_files_on_disk(const char *name,
  73                             int namelen,
  74                             u64 *blkno,
  75                             struct inode *inode,
  76                             struct ocfs2_dir_lookup_result *res);
  77int ocfs2_lookup_ino_from_name(struct inode *dir, const char *name,
  78                               int namelen, u64 *blkno);
  79int ocfs2_readdir(struct file *file, struct dir_context *ctx);
  80int ocfs2_dir_foreach(struct inode *inode, struct dir_context *ctx);
  81int ocfs2_prepare_dir_for_insert(struct ocfs2_super *osb,
  82                                 struct inode *dir,
  83                                 struct buffer_head *parent_fe_bh,
  84                                 const char *name,
  85                                 int namelen,
  86                                 struct ocfs2_dir_lookup_result *lookup);
  87struct ocfs2_alloc_context;
  88int ocfs2_fill_new_dir(struct ocfs2_super *osb,
  89                       handle_t *handle,
  90                       struct inode *parent,
  91                       struct inode *inode,
  92                       struct buffer_head *fe_bh,
  93                       struct ocfs2_alloc_context *data_ac,
  94                       struct ocfs2_alloc_context *meta_ac);
  95
  96int ocfs2_dx_dir_truncate(struct inode *dir, struct buffer_head *di_bh);
  97
  98struct ocfs2_dir_block_trailer *ocfs2_dir_trailer_from_size(int blocksize,
  99                                                            void *data);
 100#endif /* OCFS2_DIR_H */
 101