dirren.h

/* SPDX-License-Identifier: GPL-2.0 */
/*
 * Copyright (C) 2017-2019 Junjiro R. Okajima
 */

/*
 * renamed dir info
 */

#ifndef __AUFS_DIRREN_H__
#define __AUFS_DIRREN_H__

#ifdef __KERNEL__

#include "hbl.h"

#define AuDirren_NHASH 100

#ifdef CONFIG_AUFS_DIRREN
struct au_dr_hino {
	struct hlist_bl_node	dr_hnode;
	ino_t			dr_h_ino;
};

struct au_dr_br {
	struct hlist_bl_head	dr_h_ino[AuDirren_NHASH];
};
#else
struct au_dr_hino;
/* empty */
struct au_dr_br { };
#endif

/* ---------------------------------------------------------------------- */

struct au_branch;
struct au_hinode;
struct path;
struct super_block;
#ifdef CONFIG_AUFS_DIRREN
int au_dr_hino_test_add(struct au_dr_br *dr, ino_t h_ino,
			struct au_dr_hino *add_ent);
void au_dr_hino_free(struct au_dr_br *dr);
int au_dr_br_init(struct super_block *sb, struct au_branch *br,
		  const struct path *path);
int au_dr_br_fin(struct super_block *sb, struct au_branch *br);
#else
AuStubInt0(au_dr_hino_test_add, struct au_dr_br *dr, ino_t h_ino,
	   struct au_dr_hino *add_ent);
AuStubVoid(au_dr_hino_free, struct au_dr_br *dr);
AuStubInt0(au_dr_br_init, struct super_block *sb, struct au_branch *br,
	   const struct path *path);
AuStubInt0(au_dr_br_fin, struct super_block *sb, struct au_branch *br);
#endif

/* ---------------------------------------------------------------------- */

#ifdef CONFIG_AUFS_DIRREN
static inline int au_dr_ihash(ino_t h_ino)
{
	return h_ino % AuDirren_NHASH;
}
#else
AuStubInt0(au_dr_ihash, ino_t h_ino);
#endif

#endif /* __KERNEL__ */
#endif /* __AUFS_DIRREN_H__ */