/*
 * Copyright (c) 1982, 1986, 1989 Regents of the University of California.
 * All rights reserved.
 *
 * %sccs.include.redist.c%
 *
 *	@(#)ufsmount.h	7.16 (Berkeley) 10/07/92
 */

struct buf;
struct inode;
struct nameidata;
struct timeval;
struct ucred;
struct uio;
struct vnode;
struct radix_node_head;
#ifndef AF_MAX
#include <sys/socket.h>
#endif

/* This structure describes the UFS specific mount structure data. */
struct ufsmount {
	struct	mount *um_mountp;		/* filesystem vfs structure */
	dev_t	um_dev;				/* device mounted */
	struct	vnode *um_devvp;		/* block device mounted vnode */
	union {					/* pointer to superblock */
		struct	lfs *lfs;		/* LFS */
		struct	fs *fs;			/* FFS */
	} ufsmount_u;
#define	um_fs	ufsmount_u.fs
#define	um_lfs	ufsmount_u.lfs
	struct	vnode *um_quotas[MAXQUOTAS];	/* pointer to quota files */
	struct	ucred *um_cred[MAXQUOTAS];	/* quota file access cred */
	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 */
	time_t	um_btime[MAXQUOTAS];		/* block quota time limit */
	time_t	um_itime[MAXQUOTAS];		/* inode quota time limit */
	char	um_qflags[MAXQUOTAS];		/* quota specific flags */
	struct	netcred um_defexported;		/* Default export */
	struct	radix_node_head *um_rtable[AF_MAX+1]; /* Individual exports */
};
/*
 * 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 ufsmount ptr. */
#define VFSTOUFS(mp)	((struct ufsmount *)((mp)->mnt_data))

/*
 * Macros to access file system parameters in the ufsmount structure.
 * Used by ufs_bmap.
 */
#define	blkptrtodb(ump, b)	((b) << (ump)->um_bptrtodb)
#define	is_sequential(ump, a, b) ((b) == (a) + ump->um_seqinc)
#define MNINDIR(ump)	((ump)->um_nindir)