xref: /src/sys/ufs/lfs/ulfsmount.h

/*	$NetBSD: ulfsmount.h,v 1.12.8.1 2015/06/06 14:40:31 skrll Exp $	*/
/*  from NetBSD: ufsmount.h,v 1.39 2012/10/19 17:09:08 drochner Exp  */

/*
 * 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.
 * 3. 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
 */

#ifndef _UFS_LFS_ULFSMOUNT_H_
#define _UFS_LFS_ULFSMOUNT_H_

#include <sys/mount.h> /* struct export_args30 */

#ifdef _KERNEL

#if defined(_KERNEL_OPT)
#include "opt_lfs.h"
#endif

#include <sys/mutex.h>

#include <ufs/lfs/ulfs_extattr.h>
#include <ufs/lfs/ulfs_quotacommon.h>

struct buf;
struct inode;
struct nameidata;
struct timeval;
struct uio;
struct vnode;

/* This structure describes the ULFS specific mount structure data. */
struct ulfsmount {
	/* Abstract vfs-level filesystem structure. */
	struct mount *um_mountp;

	/* The block device we're mounted on. */
	dev_t um_dev;
	struct vnode *um_devvp;

	/* type of fs; currently always ULFS1, theoretically also ULFS2 */
	u_long um_fstype;

	/* pointer to the filesystem-specific filesystem structure */
	struct lfs *um_lfs;

	/* Extended attribute information. */
	struct ulfs_extattr_per_mount um_extattr;

	/* Cleaner lwp, set on first bmapv syscall. */
	struct lwp *um_cleaner_thread;

	/* Hint from cleaner, only valid if curlwp == um_cleaner_thread. */
	BLOCK_INFO *um_cleaner_hint;
	/* Quota-related material. */
	struct vnode *um_quotas[ULFS_MAXQUOTAS]; /* quota files */
	kauth_cred_t um_cred[ULFS_MAXQUOTAS];	/* quota file access cred */
	union {
	    struct um_q1 {
		time_t	q1_btime[ULFS_MAXQUOTAS]; /* block quota time limit */
		time_t	q1_itime[ULFS_MAXQUOTAS]; /* inode quota time limit */
		char	q1_qflags[ULFS_MAXQUOTAS]; /* quota flags */
	    } um_q1;
	    struct um_q2 {
		uint64_t q2_bsize;		/* block size of quota file */
		uint64_t q2_bmask;		/* mask for above */
	    } um_q2;
	} um_q;
#define umq1_btime  um_q.um_q1.q1_btime
#define umq1_itime  um_q.um_q1.q1_itime
#define umq1_qflags um_q.um_q1.q1_qflags
#define umq2_bsize  um_q.um_q2.q2_bsize
#define umq2_bmask  um_q.um_q2.q2_bmask
};

/* ULFS-specific flags for um_flags */
#define ULFS_NEEDSWAP	0x01	/* filesystem metadata need byte-swapping */
/*	unused		0x02	   */
#define ULFS_QUOTA	0x04	/* filesystem has QUOTA (v1) */
#define ULFS_QUOTA2	0x08	/* filesystem has QUOTA2 */

/*
 * Filesystem types
 */
#define ULFS1  1
#define ULFS2  2


/*
 * Flags describing the state of quotas.
 */
#define	QTF_OPENING	0x01			/* Q_QUOTAON in progress */
#define	QTF_CLOSING	0x02			/* Q_QUOTAOFF in progress */

/* Convert mount ptr to ulfsmount ptr. */
#define VFSTOULFS(mp)	((struct ulfsmount *)((mp)->mnt_data))

/*
 * Macros to access file system parameters (no longer) in the
 * ulfsmount structure.
 * Used by ulfs_bmap.
 */
#define MNINDIR(lfs)			((lfs)->um_nindir)
#define	blkptrtodb(lfs, b)		((b) << (lfs)->um_bptrtodb)

/*
 * Predicate for byte-swapping support.
 */
#define	FSFMT(vp)	(((vp)->v_mount->mnt_iflag & IMNT_DTYPE) == 0)

#endif /* _KERNEL */

#endif /* !_UFS_LFS_ULFSMOUNT_H_ */