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/*

 * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.

 * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.

 *

 * This copyrighted material is made available to anyone wishing to use,

 * modify, copy, or redistribute it subject to the terms and conditions

 * of the GNU General Public License version 2.

 */

#ifndef __DIR_DOT_H__

#define __DIR_DOT_H__

#include <linux/dcache.h>

struct inode;

struct gfs2_inode;

struct gfs2_inum;

struct inode *gfs2_dir_search(struct inode *dir, const struct qstr *filename);

int gfs2_dir_check(struct inode *dir, const struct qstr *filename,

                   const struct gfs2_inode *ip);

int gfs2_dir_add(struct inode *inode, const struct qstr *filename,

                 const struct gfs2_inode *ip, unsigned int type);

int gfs2_dir_del(struct gfs2_inode *dip, const struct qstr *filename);

int gfs2_dir_read(struct inode *inode, u64 *offset, void *opaque,

                  filldir_t filldir);

int gfs2_dir_mvino(struct gfs2_inode *dip, const struct qstr *filename,

                   const struct gfs2_inode *nip, unsigned int new_type);

int gfs2_dir_exhash_dealloc(struct gfs2_inode *dip);

int gfs2_diradd_alloc_required(struct inode *dir,

                               const struct qstr *filename);

int gfs2_dir_get_new_buffer(struct gfs2_inode *ip, u64 block,

                            struct buffer_head **bhp);

static inline u32 gfs2_disk_hash(const char *data, int len)

{

        return crc32_le((u32)~0, data, len) ^ (u32)~0;

}

static inline void gfs2_str2qstr(struct qstr *name, const char *fname)

{

        name->name = fname;

        name->len = strlen(fname);

        name->hash = gfs2_disk_hash(name->name, name->len);

}

/* N.B. This probably ought to take inum & type as args as well */

static inline void gfs2_qstr2dirent(const struct qstr *name, u16 reclen, struct gfs2_dirent *dent)

{

        dent->de_inum.no_addr = cpu_to_be64(0);

        dent->de_inum.no_formal_ino = cpu_to_be64(0);

        dent->de_hash = cpu_to_be32(name->hash);

        dent->de_rec_len = cpu_to_be16(reclen);

        dent->de_name_len = cpu_to_be16(name->len);

        dent->de_type = cpu_to_be16(0);

        memset(dent->__pad, 0, sizeof(dent->__pad));

        memcpy(dent + 1, name->name, name->len);

}

#endif /* __DIR_DOT_H__ */