[people/ms/linux.git] / fs / ocfs2 / dir.h

/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 * dir.h
 *
 * Function prototypes
 *
 * Copyright (C) 2002, 2004 Oracle.  All rights reserved.
 */

#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
328970de	1	/* SPDX-License-Identifier: GPL-2.0-or-later */
fa60ce2c	2	/*
ccd979bd MF	3	* dir.h
	4	*
	5	* Function prototypes
	6	*
	7	* Copyright (C) 2002, 2004 Oracle. All rights reserved.
ccd979bd MF	8	*/
	9
	10	#ifndef OCFS2_DIR_H
	11	#define OCFS2_DIR_H
	12
9b7895ef MF	13	struct ocfs2_dx_hinfo {
	14	u32 major_hash;
	15	u32 minor_hash;
	16	};
	17
4a12ca3a	18	struct ocfs2_dir_lookup_result {
9b7895ef MF	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
4ed8a6bb MF	24	struct buffer_head dl_dx_root_bh; / Root of indexed
4ed8a6bb MF	25	* tree */
e7c17e43	26
9b7895ef MF	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 */
e7c17e43 MF	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. */
4a12ca3a	37	};
e7c17e43	38
4a12ca3a MF	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);
316f4b9f MF	44	int ocfs2_delete_entry(handle_t *handle,
316f4b9f MF	45	struct inode *dir,
4a12ca3a	46	struct ocfs2_dir_lookup_result *res);
316f4b9f MF	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,
4a12ca3a	52	struct ocfs2_dir_lookup_result *lookup);
316f4b9f MF	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,
4a12ca3a	57	struct ocfs2_dir_lookup_result *lookup)
316f4b9f	58	{
2b0143b5	59	return __ocfs2_add_entry(handle, d_inode(dentry->d_parent),
316f4b9f	60	dentry->d_name.name, dentry->d_name.len,
4a12ca3a	61	inode, blkno, parent_fe_bh, lookup);
316f4b9f	62	}
38760e24	63	int ocfs2_update_entry(struct inode dir, handle_t handle,
4a12ca3a	64	struct ocfs2_dir_lookup_result *res,
38760e24	65	struct inode *new_entry_inode);
316f4b9f	66
ccd979bd MF	67	int ocfs2_check_dir_for_entry(struct inode *dir,
	68	const char *name,
	69	int namelen);
0bfbbf62	70	int ocfs2_empty_dir(struct inode *inode);
4a12ca3a	71
ccd979bd MF	72	int ocfs2_find_files_on_disk(const char *name,
	73	int namelen,
	74	u64 *blkno,
	75	struct inode *inode,
4a12ca3a	76	struct ocfs2_dir_lookup_result *res);
be94d117 MF	77	int ocfs2_lookup_ino_from_name(struct inode dir, const char name,
be94d117 MF	78	int namelen, u64 *blkno);
3704412b AV	79	int ocfs2_readdir(struct file file, struct dir_context ctx);
3704412b AV	80	int ocfs2_dir_foreach(struct inode inode, struct dir_context ctx);
ccd979bd MF	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,
4a12ca3a	86	struct ocfs2_dir_lookup_result *lookup);
ccd979bd	87	struct ocfs2_alloc_context;
316f4b9f MF	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,
9b7895ef MF	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);
316f4b9f	97
c175a518 JB	98	struct ocfs2_dir_block_trailer *ocfs2_dir_trailer_from_size(int blocksize,
c175a518 JB	99	void *data);
ccd979bd	100	#endif /* OCFS2_DIR_H */