fs/ocfs2/dir.h

0001 /* SPDX-License-Identifier: GPL-2.0-or-later */
0002 /*
0003  * dir.h
0004  *
0005  * Function prototypes
0006  *
0007  * Copyright (C) 2002, 2004 Oracle.  All rights reserved.
0008  */
0009
0010 #ifndef OCFS2_DIR_H
0011 #define OCFS2_DIR_H
0012
0013 struct ocfs2_dx_hinfo {
0014     u32 major_hash;
0015     u32 minor_hash;
0016 };
0017
0018 struct ocfs2_dir_lookup_result {
0019     struct buffer_head      *dl_leaf_bh;    /* Unindexed leaf
0020                              * block */
0021     struct ocfs2_dir_entry      *dl_entry;  /* Target dirent in
0022                              * unindexed leaf */
0023
0024     struct buffer_head      *dl_dx_root_bh; /* Root of indexed
0025                              * tree */
0026
0027     struct buffer_head      *dl_dx_leaf_bh; /* Indexed leaf block */
0028     struct ocfs2_dx_entry       *dl_dx_entry;   /* Target dx_entry in
0029                              * indexed leaf */
0030     struct ocfs2_dx_hinfo       dl_hinfo;   /* Name hash results */
0031
0032     struct buffer_head      *dl_prev_leaf_bh;/* Previous entry in
0033                               * dir free space
0034                               * list. NULL if
0035                               * previous entry is
0036                               * dx root block. */
0037 };
0038
0039 void ocfs2_free_dir_lookup_result(struct ocfs2_dir_lookup_result *res);
0040
0041 int ocfs2_find_entry(const char *name, int namelen,
0042              struct inode *dir,
0043              struct ocfs2_dir_lookup_result *lookup);
0044 int ocfs2_delete_entry(handle_t *handle,
0045                struct inode *dir,
0046                struct ocfs2_dir_lookup_result *res);
0047 int __ocfs2_add_entry(handle_t *handle,
0048               struct inode *dir,
0049               const char *name, int namelen,
0050               struct inode *inode, u64 blkno,
0051               struct buffer_head *parent_fe_bh,
0052               struct ocfs2_dir_lookup_result *lookup);
0053 static inline int ocfs2_add_entry(handle_t *handle,
0054                   struct dentry *dentry,
0055                   struct inode *inode, u64 blkno,
0056                   struct buffer_head *parent_fe_bh,
0057                   struct ocfs2_dir_lookup_result *lookup)
0058 {
0059     return __ocfs2_add_entry(handle, d_inode(dentry->d_parent),
0060                  dentry->d_name.name, dentry->d_name.len,
0061                  inode, blkno, parent_fe_bh, lookup);
0062 }
0063 int ocfs2_update_entry(struct inode *dir, handle_t *handle,
0064                struct ocfs2_dir_lookup_result *res,
0065                struct inode *new_entry_inode);
0066
0067 int ocfs2_check_dir_for_entry(struct inode *dir,
0068                   const char *name,
0069                   int namelen);
0070 int ocfs2_empty_dir(struct inode *inode);
0071
0072 int ocfs2_find_files_on_disk(const char *name,
0073                  int namelen,
0074                  u64 *blkno,
0075                  struct inode *inode,
0076                  struct ocfs2_dir_lookup_result *res);
0077 int ocfs2_lookup_ino_from_name(struct inode *dir, const char *name,
0078                    int namelen, u64 *blkno);
0079 int ocfs2_readdir(struct file *file, struct dir_context *ctx);
0080 int ocfs2_dir_foreach(struct inode *inode, struct dir_context *ctx);
0081 int ocfs2_prepare_dir_for_insert(struct ocfs2_super *osb,
0082                  struct inode *dir,
0083                  struct buffer_head *parent_fe_bh,
0084                  const char *name,
0085                  int namelen,
0086                  struct ocfs2_dir_lookup_result *lookup);
0087 struct ocfs2_alloc_context;
0088 int ocfs2_fill_new_dir(struct ocfs2_super *osb,
0089                handle_t *handle,
0090                struct inode *parent,
0091                struct inode *inode,
0092                struct buffer_head *fe_bh,
0093                struct ocfs2_alloc_context *data_ac,
0094                struct ocfs2_alloc_context *meta_ac);
0095
0096 int ocfs2_dx_dir_truncate(struct inode *dir, struct buffer_head *di_bh);
0097
0098 struct ocfs2_dir_block_trailer *ocfs2_dir_trailer_from_size(int blocksize,
0099                                 void *data);
0100 #endif /* OCFS2_DIR_H */