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
  13 struct ocfs2_dx_hinfo {
  14         u32     major_hash;
  15         u32     minor_hash;
  16 };
  17
  18 struct 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
  39 void ocfs2_free_dir_lookup_result(struct ocfs2_dir_lookup_result *res);
  40
  41 int ocfs2_find_entry(const char *name, int namelen,
  42                      struct inode *dir,
  43                      struct ocfs2_dir_lookup_result *lookup);
  44 int ocfs2_delete_entry(handle_t *handle,
  45                        struct inode *dir,
  46                        struct ocfs2_dir_lookup_result *res);
  47 int __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);
  53 static 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 }
  63 int ocfs2_update_entry(struct inode *dir, handle_t *handle,
  64                        struct ocfs2_dir_lookup_result *res,
  65                        struct inode *new_entry_inode);
  66
  67 int ocfs2_check_dir_for_entry(struct inode *dir,
  68                               const char *name,
  69                               int namelen);
  70 int ocfs2_empty_dir(struct inode *inode);
  71
  72 int 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);
  77 int ocfs2_lookup_ino_from_name(struct inode *dir, const char *name,
  78                                int namelen, u64 *blkno);
  79 int ocfs2_readdir(struct file *file, struct dir_context *ctx);
  80 int ocfs2_dir_foreach(struct inode *inode, struct dir_context *ctx);
  81 int 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);
  87 struct ocfs2_alloc_context;
  88 int 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
  96 int ocfs2_dx_dir_truncate(struct inode *dir, struct buffer_head *di_bh);
  97
  98 struct ocfs2_dir_block_trailer *ocfs2_dir_trailer_from_size(int blocksize,
  99                                                             void *data);
 100 #endif /* OCFS2_DIR_H */