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/*-
* Copyright (c) 1982, 1986, 1989, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)ufsmount.h 8.6 (Berkeley) 3/30/95
* $FreeBSD: release/9.1.0/sys/fs/ext2fs/ext2_mount.h 218176 2011-02-01 18:30:52Z jhb $
*/
#ifndef _FS_EXT2FS_EXT2_MOUNT_H_
#define _FS_EXT2FS_EXT2_MOUNT_H_
#ifdef _KERNEL
#ifdef MALLOC_DECLARE
MALLOC_DECLARE(M_EXT2NODE);
#endif
struct vnode;
/* This structure describes the ext2fs specific mount structure data. */
struct ext2mount {
struct mount *um_mountp; /* filesystem vfs structure */
struct cdev *um_dev; /* device mounted */
struct vnode *um_devvp; /* block device mounted vnode */
struct m_ext2fs *um_e2fs; /* EXT2FS */
#define em_e2fsb um_e2fs->e2fs
u_long um_nindir; /* indirect ptrs per block */
u_long um_bptrtodb; /* indir ptr to disk block */
u_long um_seqinc; /* inc between seq blocks */
struct mtx um_lock; /* Protects ext2mount & fs */
struct g_consumer *um_cp;
struct bufobj *um_bo;
};
#define EXT2_LOCK(aa) mtx_lock(&(aa)->um_lock)
#define EXT2_UNLOCK(aa) mtx_unlock(&(aa)->um_lock)
#define EXT2_MTX(aa) (&(aa)->um_lock)
/* Convert mount ptr to ext2fsmount ptr. */
#define VFSTOEXT2(mp) ((struct ext2mount *)((mp)->mnt_data))
/*
* Macros to access file system parameters in the ufsmount structure.
* Used by ufs_bmap.
*/
#define MNINDIR(ump) ((ump)->um_nindir)
#define blkptrtodb(ump, b) ((b) << (ump)->um_bptrtodb)
#define is_sequential(ump, a, b) ((b) == (a) + ump->um_seqinc)
#endif /* _KERNEL */
#endif /* !_FS_EXT2FS_EXT2_MOUNT_H_ */