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/* (-lgl
 * 	COHERENT Version 3.0
 * 	Copyright (c) 1982, 1990 by Mark Williams Company.
 * 	All rights reserved. May not be copied without permission.
 -lgl) */
/*
 * Memory resident inodes.
 */
#ifndef	INODE_H
#define	INODE_H	INODE_H

#include <sys/types.h>

/*
 * Size of pipe buffer.
 */
#define	PIPSIZE	(ND*BSIZE)

/*
 * File inode.
 */
typedef struct inode {
	dev_t	i_dev;			/* Device */
	ino_t	i_ino;			/* Inode index */
	int	i_refc;			/* Reference count */
	unsigned i_lrt;			/* Last reference time */
	GATE	i_gate;			/* Gate */
	int	i_flag;			/* Flags */
	int	i_mode;			/* Mode and type */
	int	i_nlink;		/* Number of links */
	int	i_uid;			/* Owner's user id */
	int	i_gid;			/* Owner's group id */
	fsize_t	i_size;			/* Size of file in bytes */
	union ia_u {
		daddr_t	i_addr[13];	/* Disk addresses */
		dev_t	i_rdev;		/* Real device */
		struct ip_s {		/* Pipes */
			daddr_t ip_pipe[10];
			int	ip_pnc;
			int	ip_prx;
			int	ip_pwx;
		}	i_p;
	}	i_a;			/* Addresses */
	time_t	i_atime;		/* Last access time */
	time_t	i_mtime;		/* Last modify time */
	time_t	i_ctime;		/* Creation time */
} INODE;

/*
 * Compatibility.
 */
#define i_pipe	i_a.i_p.ip_pipe
#define i_pnc	i_a.i_p.ip_pnc
#define i_prx	i_a.i_p.ip_prx
#define i_pwx	i_a.i_p.ip_pwx

/*
 * Flags.
 */
#define	IFACC	0001			/* File has been accessed */
#define	IFMOD	0002			/* File has been modified */
#define	IFCRT	0004			/* File has been created */
#define IFMNT	0010			/* Contains mounted file system */
#define	IFWFR	0020			/* Sleeping on pipe full */
#define	IFWFW	0040			/* Sleeping on pipe empty */
#define	IFEOF	0100			/* End of file on pipe */

/*
 * Permission bits.
 */
#define IPR	0000004			/* Read */
#define IPW	0000002			/* Write */
#define IPE	0000001			/* Execute */

/*
 * Bit for no-delay i/o.
 */
#define	IPNDLY	 0010
#define	IPAPPEND 0020

/*
 * Bit for dup system call.
 */
#define DUP2	0100

#ifdef KERNEL
/*
 * Macro functions.
 */
#define ilock(ip)	lock(ip->i_gate)
#define iunlock(ip)	unlock(ip->i_gate)
#define ilocked(ip)	locked(ip->i_gate)

#endif

#ifdef KERNEL
/*
 * Functions to set modify time.
 */
#define iacc(ip) {							\
	ip->i_flag |= IFACC;						\
	ip->i_atime = timer.t_time;					\
}

#define imod(ip) {							\
	ip->i_flag |= IFMOD;						\
	ip->i_mtime = timer.t_time;					\
}

#define icrt(ip) {							\
	ip->i_flag |= IFCRT;						\
	ip->i_ctime = timer.t_time;					\
}

#define iamc(ip) {							\
	ip->i_flag |= IFACC|IFMOD|IFCRT;				\
	ip->i_atime = timer.t_time;					\
	ip->i_mtime = timer.t_time;					\
	ip->i_ctime = timer.t_time;					\
}

#endif

#ifdef KERNEL
/*
 * Functions.
 */
extern	INODE	*exlopen();		/* exec.c */
extern	INODE	*ftoim();		/* fs1.c */
extern	INODE	*imake();		/* fs1.c */
extern	INODE	*iattach();		/* fs1.c */
extern	INODE	*ialloc();		/* fs2.c */
extern	daddr_t	balloc();		/* fs2.c */
extern	INODE	*pmake();		/* pipe.c */

#endif

#ifdef KERNEL
/*
 * Global variables.
 */
extern	int	ronflag;		/* Root is read only */
extern	INODE	*inodep;		/* Pointer to in core inodes */
extern	INODE	*acctip;		/* Accounting file pointer */

#endif

#endif

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