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 */