[linux-2.6-block.git] / fs / ocfs2 / dir.h

/* -*- 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 */
Commit	Line	Data
ccd979bd MF	1	/* -- mode: c; c-basic-offset: 8; --
	2	* vim: noexpandtab sw=8 ts=8 sts=0:
	3	*
	4	* dir.h
	5	*
	6	* Function prototypes
	7	*
	8	* Copyright (C) 2002, 2004 Oracle. All rights reserved.
	9	*
	10	* This program is free software; you can redistribute it and/or
	11	* modify it under the terms of the GNU General Public
	12	* License as published by the Free Software Foundation; either
	13	* version 2 of the License, or (at your option) any later version.
	14	*
	15	* This program is distributed in the hope that it will be useful,
	16	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	17	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	18	* General Public License for more details.
	19	*
	20	* You should have received a copy of the GNU General Public
	21	* License along with this program; if not, write to the
	22	* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
	23	* Boston, MA 021110-1307, USA.
	24	*/
	25
	26	#ifndef OCFS2_DIR_H
	27	#define OCFS2_DIR_H
	28
9b7895ef MF	29	struct ocfs2_dx_hinfo {
	30	u32 major_hash;
	31	u32 minor_hash;
	32	};
	33
4a12ca3a	34	struct ocfs2_dir_lookup_result {
9b7895ef MF	35	struct buffer_head dl_leaf_bh; / Unindexed leaf
	36	* block */
	37	struct ocfs2_dir_entry dl_entry; / Target dirent in
	38	* unindexed leaf */
	39
4ed8a6bb MF	40	struct buffer_head dl_dx_root_bh; / Root of indexed
4ed8a6bb MF	41	* tree */
e7c17e43	42
9b7895ef MF	43	struct buffer_head dl_dx_leaf_bh; / Indexed leaf block */
	44	struct ocfs2_dx_entry dl_dx_entry; / Target dx_entry in
	45	* indexed leaf */
	46	struct ocfs2_dx_hinfo dl_hinfo; /* Name hash results */
e7c17e43 MF	47
	48	struct buffer_head dl_prev_leaf_bh;/ Previous entry in
	49	* dir free space
	50	* list. NULL if
	51	* previous entry is
	52	* dx root block. */
4a12ca3a	53	};
e7c17e43	54
4a12ca3a MF	55	void ocfs2_free_dir_lookup_result(struct ocfs2_dir_lookup_result *res);
	56
	57	int ocfs2_find_entry(const char *name, int namelen,
	58	struct inode *dir,
	59	struct ocfs2_dir_lookup_result *lookup);
316f4b9f MF	60	int ocfs2_delete_entry(handle_t *handle,
316f4b9f MF	61	struct inode *dir,
4a12ca3a	62	struct ocfs2_dir_lookup_result *res);
316f4b9f MF	63	int __ocfs2_add_entry(handle_t *handle,
	64	struct inode *dir,
	65	const char *name, int namelen,
	66	struct inode *inode, u64 blkno,
	67	struct buffer_head *parent_fe_bh,
4a12ca3a	68	struct ocfs2_dir_lookup_result *lookup);
316f4b9f MF	69	static inline int ocfs2_add_entry(handle_t *handle,
	70	struct dentry *dentry,
	71	struct inode *inode, u64 blkno,
	72	struct buffer_head *parent_fe_bh,
4a12ca3a	73	struct ocfs2_dir_lookup_result *lookup)
316f4b9f	74	{
2b0143b5	75	return __ocfs2_add_entry(handle, d_inode(dentry->d_parent),
316f4b9f	76	dentry->d_name.name, dentry->d_name.len,
4a12ca3a	77	inode, blkno, parent_fe_bh, lookup);
316f4b9f	78	}
38760e24	79	int ocfs2_update_entry(struct inode dir, handle_t handle,
4a12ca3a	80	struct ocfs2_dir_lookup_result *res,
38760e24	81	struct inode *new_entry_inode);
316f4b9f	82
ccd979bd MF	83	int ocfs2_check_dir_for_entry(struct inode *dir,
	84	const char *name,
	85	int namelen);
0bfbbf62	86	int ocfs2_empty_dir(struct inode *inode);
4a12ca3a	87
ccd979bd MF	88	int ocfs2_find_files_on_disk(const char *name,
	89	int namelen,
	90	u64 *blkno,
	91	struct inode *inode,
4a12ca3a	92	struct ocfs2_dir_lookup_result *res);
be94d117 MF	93	int ocfs2_lookup_ino_from_name(struct inode dir, const char name,
be94d117 MF	94	int namelen, u64 *blkno);
3704412b AV	95	int ocfs2_readdir(struct file file, struct dir_context ctx);
3704412b AV	96	int ocfs2_dir_foreach(struct inode inode, struct dir_context ctx);
ccd979bd MF	97	int ocfs2_prepare_dir_for_insert(struct ocfs2_super *osb,
	98	struct inode *dir,
	99	struct buffer_head *parent_fe_bh,
	100	const char *name,
	101	int namelen,
4a12ca3a	102	struct ocfs2_dir_lookup_result *lookup);
ccd979bd	103	struct ocfs2_alloc_context;
316f4b9f MF	104	int ocfs2_fill_new_dir(struct ocfs2_super *osb,
	105	handle_t *handle,
	106	struct inode *parent,
	107	struct inode *inode,
	108	struct buffer_head *fe_bh,
9b7895ef MF	109	struct ocfs2_alloc_context *data_ac,
	110	struct ocfs2_alloc_context *meta_ac);
	111
	112	int ocfs2_dx_dir_truncate(struct inode dir, struct buffer_head di_bh);
316f4b9f	113
c175a518 JB	114	struct ocfs2_dir_block_trailer *ocfs2_dir_trailer_from_size(int blocksize,
c175a518 JB	115	void *data);
ccd979bd	116	#endif /* OCFS2_DIR_H */