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Diffstat (limited to 'fs/ocfs2/dir.h')
| -rw-r--r-- | fs/ocfs2/dir.h | 116 |
1 files changed, 116 insertions, 0 deletions
diff --git a/fs/ocfs2/dir.h b/fs/ocfs2/dir.h new file mode 100644 index 000000000..3d8639f38 --- /dev/null +++ b/fs/ocfs2/dir.h @@ -0,0 +1,116 @@ +/* -*- mode: c; c-basic-offset: 8; -*- + * vim: noexpandtab sw=8 ts=8 sts=0: + * + * dir.h + * + * Function prototypes + * + * Copyright (C) 2002, 2004 Oracle. All rights reserved. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public + * License along with this program; if not, write to the + * Free Software Foundation, Inc., 59 Temple Place - Suite 330, + * Boston, MA 021110-1307, USA. + */ + +#ifndef OCFS2_DIR_H +#define OCFS2_DIR_H + +struct ocfs2_dx_hinfo { + u32 major_hash; + u32 minor_hash; +}; + +struct ocfs2_dir_lookup_result { + struct buffer_head *dl_leaf_bh; /* Unindexed leaf + * block */ + struct ocfs2_dir_entry *dl_entry; /* Target dirent in + * unindexed leaf */ + + struct buffer_head *dl_dx_root_bh; /* Root of indexed + * tree */ + + struct buffer_head *dl_dx_leaf_bh; /* Indexed leaf block */ + struct ocfs2_dx_entry *dl_dx_entry; /* Target dx_entry in + * indexed leaf */ + struct ocfs2_dx_hinfo dl_hinfo; /* Name hash results */ + + struct buffer_head *dl_prev_leaf_bh;/* Previous entry in + * dir free space + * list. NULL if + * previous entry is + * dx root block. */ +}; + +void ocfs2_free_dir_lookup_result(struct ocfs2_dir_lookup_result *res); + +int ocfs2_find_entry(const char *name, int namelen, + struct inode *dir, + struct ocfs2_dir_lookup_result *lookup); +int ocfs2_delete_entry(handle_t *handle, + struct inode *dir, + struct ocfs2_dir_lookup_result *res); +int __ocfs2_add_entry(handle_t *handle, + struct inode *dir, + const char *name, int namelen, + struct inode *inode, u64 blkno, + struct buffer_head *parent_fe_bh, + struct ocfs2_dir_lookup_result *lookup); +static inline int ocfs2_add_entry(handle_t *handle, + struct dentry *dentry, + struct inode *inode, u64 blkno, + struct buffer_head *parent_fe_bh, + struct ocfs2_dir_lookup_result *lookup) +{ + return __ocfs2_add_entry(handle, d_inode(dentry->d_parent), + dentry->d_name.name, dentry->d_name.len, + inode, blkno, parent_fe_bh, lookup); +} +int ocfs2_update_entry(struct inode *dir, handle_t *handle, + struct ocfs2_dir_lookup_result *res, + struct inode *new_entry_inode); + +int ocfs2_check_dir_for_entry(struct inode *dir, + const char *name, + int namelen); +int ocfs2_empty_dir(struct inode *inode); + +int ocfs2_find_files_on_disk(const char *name, + int namelen, + u64 *blkno, + struct inode *inode, + struct ocfs2_dir_lookup_result *res); +int ocfs2_lookup_ino_from_name(struct inode *dir, const char *name, + int namelen, u64 *blkno); +int ocfs2_readdir(struct file *file, struct dir_context *ctx); +int ocfs2_dir_foreach(struct inode *inode, struct dir_context *ctx); +int ocfs2_prepare_dir_for_insert(struct ocfs2_super *osb, + struct inode *dir, + struct buffer_head *parent_fe_bh, + const char *name, + int namelen, + struct ocfs2_dir_lookup_result *lookup); +struct ocfs2_alloc_context; +int ocfs2_fill_new_dir(struct ocfs2_super *osb, + handle_t *handle, + struct inode *parent, + struct inode *inode, + struct buffer_head *fe_bh, + struct ocfs2_alloc_context *data_ac, + struct ocfs2_alloc_context *meta_ac); + +int ocfs2_dx_dir_truncate(struct inode *dir, struct buffer_head *di_bh); + +struct ocfs2_dir_block_trailer *ocfs2_dir_trailer_from_size(int blocksize, + void *data); +#endif /* OCFS2_DIR_H */ |