1/* SPDX-License-Identifier: GPL-2.0-or-later */ 2/* -*- mode: c; c-basic-offset: 8; -*- 3 * vim: noexpandtab sw=8 ts=8 sts=0: 4 * 5 * dir.h 6 * 7 * Function prototypes 8 * 9 * Copyright (C) 2002, 2004 Oracle. All rights reserved. 10 */ 11 12#ifndef OCFS2_DIR_H 13#define OCFS2_DIR_H 14 15struct ocfs2_dx_hinfo { 16 u32 major_hash; 17 u32 minor_hash; 18}; 19 20struct ocfs2_dir_lookup_result { 21 struct buffer_head *dl_leaf_bh; /* Unindexed leaf 22 * block */ 23 struct ocfs2_dir_entry *dl_entry; /* Target dirent in 24 * unindexed leaf */ 25 26 struct buffer_head *dl_dx_root_bh; /* Root of indexed 27 * tree */ 28 29 struct buffer_head *dl_dx_leaf_bh; /* Indexed leaf block */ 30 struct ocfs2_dx_entry *dl_dx_entry; /* Target dx_entry in 31 * indexed leaf */ 32 struct ocfs2_dx_hinfo dl_hinfo; /* Name hash results */ 33 34 struct buffer_head *dl_prev_leaf_bh;/* Previous entry in 35 * dir free space 36 * list. NULL if 37 * previous entry is 38 * dx root block. */ 39}; 40 41void ocfs2_free_dir_lookup_result(struct ocfs2_dir_lookup_result *res); 42 43int ocfs2_find_entry(const char *name, int namelen, 44 struct inode *dir, 45 struct ocfs2_dir_lookup_result *lookup); 46int ocfs2_delete_entry(handle_t *handle, 47 struct inode *dir, 48 struct ocfs2_dir_lookup_result *res); 49int __ocfs2_add_entry(handle_t *handle, 50 struct inode *dir, 51 const char *name, int namelen, 52 struct inode *inode, u64 blkno, 53 struct buffer_head *parent_fe_bh, 54 struct ocfs2_dir_lookup_result *lookup); 55static inline int ocfs2_add_entry(handle_t *handle, 56 struct dentry *dentry, 57 struct inode *inode, u64 blkno, 58 struct buffer_head *parent_fe_bh, 59 struct ocfs2_dir_lookup_result *lookup) 60{ 61 return __ocfs2_add_entry(handle, d_inode(dentry->d_parent), 62 dentry->d_name.name, dentry->d_name.len, 63 inode, blkno, parent_fe_bh, lookup); 64} 65int ocfs2_update_entry(struct inode *dir, handle_t *handle, 66 struct ocfs2_dir_lookup_result *res, 67 struct inode *new_entry_inode); 68 69int ocfs2_check_dir_for_entry(struct inode *dir, 70 const char *name, 71 int namelen); 72int ocfs2_empty_dir(struct inode *inode); 73 74int ocfs2_find_files_on_disk(const char *name, 75 int namelen, 76 u64 *blkno, 77 struct inode *inode, 78 struct ocfs2_dir_lookup_result *res); 79int ocfs2_lookup_ino_from_name(struct inode *dir, const char *name, 80 int namelen, u64 *blkno); 81int ocfs2_readdir(struct file *file, struct dir_context *ctx); 82int ocfs2_dir_foreach(struct inode *inode, struct dir_context *ctx); 83int ocfs2_prepare_dir_for_insert(struct ocfs2_super *osb, 84 struct inode *dir, 85 struct buffer_head *parent_fe_bh, 86 const char *name, 87 int namelen, 88 struct ocfs2_dir_lookup_result *lookup); 89struct ocfs2_alloc_context; 90int ocfs2_fill_new_dir(struct ocfs2_super *osb, 91 handle_t *handle, 92 struct inode *parent, 93 struct inode *inode, 94 struct buffer_head *fe_bh, 95 struct ocfs2_alloc_context *data_ac, 96 struct ocfs2_alloc_context *meta_ac); 97 98int ocfs2_dx_dir_truncate(struct inode *dir, struct buffer_head *di_bh); 99 100struct ocfs2_dir_block_trailer *ocfs2_dir_trailer_from_size(int blocksize, 101 void *data); 102#endif /* OCFS2_DIR_H */ 103