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 */ 101