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freebsd
GitHub Repository: freebsd/freebsd-src
 Path: blob/main/sys/fs/ext2fs/ext2_mount.h
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/*-

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 * SPDX-License-Identifier: BSD-3-Clause

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 *

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 * Copyright (c) 1982, 1986, 1989, 1993

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 *	The Regents of the University of California.  All rights reserved.

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 *

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 * Redistribution and use in source and binary forms, with or without

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 * modification, are permitted provided that the following conditions

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 * are met:

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 * 1. Redistributions of source code must retain the above copyright

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 *    notice, this list of conditions and the following disclaimer.

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 * 2. Redistributions in binary form must reproduce the above copyright

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 *    notice, this list of conditions and the following disclaimer in the

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 *    documentation and/or other materials provided with the distribution.

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 * 3. Neither the name of the University nor the names of its contributors

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 *    may be used to endorse or promote products derived from this software

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 *    without specific prior written permission.

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 *

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 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND

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 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

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 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE

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 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

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 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

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 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

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 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

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 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

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 * SUCH DAMAGE.

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 */

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#ifndef _FS_EXT2FS_EXT2_MOUNT_H_

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#define	_FS_EXT2FS_EXT2_MOUNT_H_

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#ifdef _KERNEL

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#ifdef MALLOC_DECLARE

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MALLOC_DECLARE(M_EXT2NODE);

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#endif

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struct vnode;

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/* This structure describes the ext2fs specific mount structure data. */

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struct ext2mount {

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	struct	mount *um_mountp;		/* filesystem vfs structure */

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	struct	cdev *um_dev;			/* device mounted */

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	struct	vnode *um_devvp;		/* block device mounted vnode */

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	struct	m_ext2fs *um_e2fs;		/* EXT2FS */

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	u_long	um_nindir;			/* indirect ptrs per block */

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	u_long	um_bptrtodb;			/* indir ptr to disk block */

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	u_long	um_seqinc;			/* inc between seq blocks */

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	struct mtx um_lock;			/* Protects ext2mount & fs */

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	struct g_consumer *um_cp;

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	struct bufobj *um_bo;

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};

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#define	EXT2_LOCK(aa)		mtx_lock(&(aa)->um_lock)

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#define	EXT2_UNLOCK(aa)	mtx_unlock(&(aa)->um_lock)

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#define	EXT2_MTX(aa)		(&(aa)->um_lock)

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/* Convert mount ptr to ext2fsmount ptr. */

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#define	VFSTOEXT2(mp)	((struct ext2mount *)((mp)->mnt_data))

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/*

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 * Macros to access file system parameters in the ufsmount structure.

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 * Used by ufs_bmap.

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 */

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#define	MNINDIR(ump)			((ump)->um_nindir)

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#define	blkptrtodb(ump, b)		((b) << (ump)->um_bptrtodb)

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#define	is_sequential(ump, a, b)	((b) == (a) + ump->um_seqinc)

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#endif	/* _KERNEL */

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#endif	/* !_FS_EXT2FS_EXT2_MOUNT_H_ */

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