/*	$NetBSD: inode.h,v 1.35 2003/05/15 20:25:33 kristerw Exp $	*/

/*
 * Copyright (c) 1982, 1989, 1993
 *	The Regents of the University of California.  All rights reserved.
 * (c) UNIX System Laboratories, Inc.
 * All or some portions of this file are derived from material licensed
 * to the University of California by American Telephone and Telegraph
 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
 * the permission of UNIX System Laboratories, Inc.
 *
 * 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. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 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.
 *
 *	@(#)inode.h	8.9 (Berkeley) 5/14/95
 */

#ifndef _UFS_UFS_INODE_H_
#define _UFS_UFS_INODE_H_

#include <sys/vnode.h>
#include <ufs/ufs/dinode.h>
#include <ufs/ufs/dir.h>
#include <ufs/ufs/quota.h>
#include <ufs/ext2fs/ext2fs_dinode.h>
#include <miscfs/genfs/genfs_node.h>

/*
 * Per-filesystem inode extensions.
 */
struct ext2fs_inode_ext {
	daddr_t ext2fs_last_lblk;	/* last logical block allocated */
	daddr_t ext2fs_last_blk;	/* last block allocated on disk */
};

struct lfs_inode_ext;

/*
 * The inode is used to describe each active (or recently active) file in the
 * UFS filesystem. It is composed of two types of information. The first part
 * is the information that is needed only while the file is active (such as
 * the identity of the file and linkage to speed its lookup). The second part
 * is the permanent meta-data associated with the file which is read in
 * from the permanent dinode from long term storage when the file becomes
 * active, and is put back when the file is no longer being used.
 */
struct inode {
	struct genfs_node i_gnode;
	LIST_ENTRY(inode) i_hash;/* Hash chain. */
	struct	vnode *i_vnode;	/* Vnode associated with this inode. */
	struct  ufsmount *i_ump; /* Mount point associated with this inode. */
	struct	vnode *i_devvp;	/* Vnode for block I/O. */
	u_int32_t i_flag;	/* flags, see below */
	dev_t	  i_dev;	/* Device associated with the inode. */
	ino_t	  i_number;	/* The identity of the inode. */

	union {			/* Associated filesystem. */
		struct	fs *fs;		/* FFS */
		struct	lfs *lfs;	/* LFS */
		struct	m_ext2fs *e2fs;	/* EXT2FS */
	} inode_u;
#define	i_fs	inode_u.fs
#define	i_lfs	inode_u.lfs
#define	i_e2fs	inode_u.e2fs

	struct	 buflists i_pcbufhd;	/* softdep pagecache buffer head */
	struct	 dquot *i_dquot[MAXQUOTAS]; /* Dquot structures. */
	u_quad_t i_modrev;	/* Revision level for NFS lease. */
	struct	 lockf *i_lockf;/* Head of byte-level lock list. */

	/*
	 * Side effects; used during directory lookup.
	 */
	int32_t	  i_count;	/* Size of free slot in directory. */
	doff_t	  i_endoff;	/* End of useful stuff in directory. */
	doff_t	  i_diroff;	/* Offset in dir, where we found last entry. */
	doff_t	  i_offset;	/* Offset of free space in directory. */
	u_int32_t i_reclen;	/* Size of found directory entry. */
	int       i_ffs_effnlink;  /* i_nlink when I/O completes */
	/*
	 * Inode extensions
	 */
	union {
		/* Other extensions could go here... */
		struct	ext2fs_inode_ext e2fs;
		struct  lfs_inode_ext *lfs;
	} inode_ext;
#define	i_e2fs_last_lblk	inode_ext.e2fs.ext2fs_last_lblk
#define	i_e2fs_last_blk		inode_ext.e2fs.ext2fs_last_blk
	/*
	 * Copies from the on-disk dinode itself.
	 *
	 * These fields are currently only used by FFS and LFS,
	 * do NOT use them with ext2fs.
	 */
	u_int16_t i_mode;	/* IFMT, permissions; see below. */
	int16_t   i_nlink;	/* File link count. */
	u_int64_t i_size;	/* File byte count. */
	u_int32_t i_flags;	/* Status flags (chflags). */
	int32_t   i_gen;	/* Generation number. */
	u_int32_t i_uid;	/* File owner. */
	u_int32_t i_gid;	/* File group. */

	/*
	 * The on-disk dinode itself.
	 */
	union {
		struct	ufs1_dinode *ffs1_din;	/* 128 bytes of the on-disk dinode. */
		struct	ufs2_dinode *ffs2_din;
		struct	ext2fs_dinode *e2fs_din; /* 128 bytes of the on-disk
						   dinode. */
	} i_din;
};

#define	i_ffs1_atime		i_din.ffs1_din->di_atime
#define	i_ffs1_atimensec	i_din.ffs1_din->di_atimensec
#define	i_ffs1_blocks		i_din.ffs1_din->di_blocks
#define	i_ffs1_ctime		i_din.ffs1_din->di_ctime
#define	i_ffs1_ctimensec	i_din.ffs1_din->di_ctimensec
#define	i_ffs1_db		i_din.ffs1_din->di_db
#define	i_ffs1_flags		i_din.ffs1_din->di_flags
#define	i_ffs1_gen		i_din.ffs1_din->di_gen
#define	i_ffs1_gid		i_din.ffs1_din->di_gid
#define	i_ffs1_ib		i_din.ffs1_din->di_ib
#define	i_ffs1_mode		i_din.ffs1_din->di_mode
#define	i_ffs1_mtime		i_din.ffs1_din->di_mtime
#define	i_ffs1_mtimensec	i_din.ffs1_din->di_mtimensec
#define	i_ffs1_nlink		i_din.ffs1_din->di_nlink
#define	i_ffs1_rdev		i_din.ffs1_din->di_rdev
#define	i_ffs1_size		i_din.ffs1_din->di_size
#define	i_ffs1_uid		i_din.ffs1_din->di_uid
#define i_ffs1_ouid		i_din.ffs1_din->di_u.oldids[0]
#define i_ffs1_ogid		i_din.ffs1_din->di_u.oldids[1]

#define	i_ffs2_atime		i_din.ffs2_din->di_atime
#define	i_ffs2_atimensec	i_din.ffs2_din->di_atimensec
#define i_ffs2_birthtime	i_din.ffs2_din->di_birthtime
#define i_ffs2_birthnsec	i_din.ffs2_din->di_birthnsec
#define	i_ffs2_blocks		i_din.ffs2_din->di_blocks
#define i_ffs2_blksize		i_din.ffs2_din->di_blksize
#define	i_ffs2_ctime		i_din.ffs2_din->di_ctime
#define	i_ffs2_ctimensec	i_din.ffs2_din->di_ctimensec
#define	i_ffs2_db		i_din.ffs2_din->di_db
#define	i_ffs2_flags		i_din.ffs2_din->di_flags
#define	i_ffs2_gen		i_din.ffs2_din->di_gen
#define	i_ffs2_gid		i_din.ffs2_din->di_gid
#define	i_ffs2_ib		i_din.ffs2_din->di_ib
#define	i_ffs2_mode		i_din.ffs2_din->di_mode
#define	i_ffs2_mtime		i_din.ffs2_din->di_mtime
#define	i_ffs2_mtimensec	i_din.ffs2_din->di_mtimensec
#define	i_ffs2_nlink		i_din.ffs2_din->di_nlink
#define	i_ffs2_rdev		i_din.ffs2_din->di_rdev
#define	i_ffs2_size		i_din.ffs2_din->di_size
#define	i_ffs2_uid		i_din.ffs2_din->di_uid
#define i_ffs2_kernflags	i_din.ffs2_din->di_kernflags
#define i_ffs2_extsize		i_din.ffs2_din->di_extsize
#define i_ffs2_extb		i_din.ffs2_din->di_extb

#define	i_e2fs_mode		i_din.e2fs_din->e2di_mode
#define	i_e2fs_uid		i_din.e2fs_din->e2di_uid
#define	i_e2fs_size		i_din.e2fs_din->e2di_size
#define	i_e2fs_atime		i_din.e2fs_din->e2di_atime
#define	i_e2fs_ctime		i_din.e2fs_din->e2di_ctime
#define	i_e2fs_mtime		i_din.e2fs_din->e2di_mtime
#define	i_e2fs_dtime		i_din.e2fs_din->e2di_dtime
#define	i_e2fs_gid		i_din.e2fs_din->e2di_gid
#define	i_e2fs_nlink		i_din.e2fs_din->e2di_nlink
#define	i_e2fs_nblock		i_din.e2fs_din->e2di_nblock
#define	i_e2fs_flags		i_din.e2fs_din->e2di_flags
#define	i_e2fs_blocks		i_din.e2fs_din->e2di_blocks
#define	i_e2fs_gen		i_din.e2fs_din->e2di_gen
#define	i_e2fs_facl		i_din.e2fs_din->e2di_facl
#define	i_e2fs_dacl		i_din.e2fs_din->e2di_dacl
#define	i_e2fs_faddr		i_din.e2fs_din->e2di_faddr
#define	i_e2fs_nfrag		i_din.e2fs_din->e2di_nfrag
#define	i_e2fs_fsize		i_din.e2fs_din->e2di_fsize
#define	i_e2fs_rdev		i_din.e2fs_din->e2di_rdev

/* These flags are kept in i_flag. */
#define	IN_ACCESS	0x0001		/* Access time update request. */
#define	IN_CHANGE	0x0002		/* Inode change time update request. */
#define	IN_UPDATE	0x0004		/* Modification time update request. */
#define	IN_MODIFIED	0x0008		/* Inode has been modified. */
#define	IN_ACCESSED	0x0010		/* Inode has been accessed. */
#define	IN_RENAME	0x0020		/* Inode is being renamed. */
#define	IN_SHLOCK	0x0040		/* File has shared lock. */
#define	IN_EXLOCK	0x0080		/* File has exclusive lock. */
#define	IN_CLEANING	0x0100		/* LFS: file is being cleaned */
#define	IN_ADIROP	0x0200		/* LFS: dirop in progress */
#define IN_SPACECOUNTED	0x0400		/* Blocks to be freed in free count. */
#define IN_PAGING       0x1000          /* LFS: file is on paging queue */

#if defined(_KERNEL)

/*
 * The DIP macro is used to access fields in the dinode that are
 * not cached in the inode itself.
 */
#define DIP(ip, field) \
	(((ip)->i_ump->um_fstype == UFS1) ? \
	(ip)->i_ffs1_##field : (ip)->i_ffs2_##field)

#define DIP_ASSIGN(ip, field, value)					\
	do {								\
		if ((ip)->i_ump->um_fstype == UFS1)			\
			(ip)->i_ffs1_##field = (value);			\
		else							\
			(ip)->i_ffs2_##field = (value);			\
	} while(0)

#define DIP_ADD(ip, field, value)					\
	do {								\
		if ((ip)->i_ump->um_fstype == UFS1)			\
			(ip)->i_ffs1_##field += (value);		\
		else							\
			(ip)->i_ffs2_##field += (value);		\
	} while(0)

#define  SHORTLINK(ip) \
	(((ip)->i_ump->um_fstype == UFS1) ? \
	(caddr_t)(ip)->i_ffs1_db : (caddr_t)(ip)->i_ffs2_db)


/*
 * Structure used to pass around logical block paths generated by
 * ufs_getlbns and used by truncate and bmap code.
 */
struct indir {
	daddr_t in_lbn;		/* Logical block number. */
	int	in_off;			/* Offset in buffer. */
	int	in_exists;		/* Flag if the block exists. */
};

/* Convert between inode pointers and vnode pointers. */
#define	VTOI(vp)	((struct inode *)(vp)->v_data)
#define	ITOV(ip)	((ip)->i_vnode)

#define	FFS_ITIMES(ip, acc, mod, cre) {					\
	if ((ip)->i_flag & (IN_ACCESS | IN_CHANGE | IN_UPDATE)) {	\
		if ((ip)->i_flag & IN_ACCESS) {				\
			DIP_ASSIGN(ip, atime, (acc)->tv_sec);		\
			DIP_ASSIGN(ip, atimensec, (acc)->tv_nsec);	\
			(ip)->i_flag |= IN_ACCESSED;			\
		}							\
		if ((ip)->i_flag & IN_UPDATE) {				\
			DIP_ASSIGN(ip, mtime, (mod)->tv_sec);		\
			DIP_ASSIGN(ip, mtimensec, (mod)->tv_nsec);	\
			(ip)->i_modrev++;				\
			(ip)->i_flag |= IN_MODIFIED;			\
		}							\
		if ((ip)->i_flag & IN_CHANGE) {				\
			DIP_ASSIGN(ip, ctime, (cre)->tv_sec);		\
			DIP_ASSIGN(ip, ctimensec, (cre)->tv_nsec);	\
			(ip)->i_flag |= IN_MODIFIED;			\
		}							\
		(ip)->i_flag &= ~(IN_ACCESS | IN_CHANGE | IN_UPDATE);	\
	}								\
}

#define	EXT2FS_ITIMES(ip, acc, mod, cre) {				\
	if ((ip)->i_flag & (IN_ACCESS | IN_CHANGE | IN_UPDATE)) {	\
		if ((ip)->i_flag & IN_ACCESS) {				\
			(ip)->i_e2fs_atime = (acc)->tv_sec;		\
			(ip)->i_flag |= IN_ACCESSED;			\
		}							\
		if ((ip)->i_flag & IN_UPDATE) {				\
			(ip)->i_e2fs_mtime = (mod)->tv_sec;		\
			(ip)->i_modrev++;				\
			(ip)->i_flag |= IN_MODIFIED;			\
		}							\
		if ((ip)->i_flag & IN_CHANGE) {				\
			(ip)->i_e2fs_ctime = (cre)->tv_sec;		\
			(ip)->i_flag |= IN_MODIFIED;			\
		}							\
		(ip)->i_flag &= ~(IN_ACCESS | IN_CHANGE | IN_UPDATE);	\
	}								\
}

#define	ITIMES(ip, acc, mod, cre) {			\
	if (IS_EXT2_VNODE((ip)->i_vnode))		\
		EXT2FS_ITIMES(ip, acc, mod, cre)	\
	else						\
		FFS_ITIMES(ip, acc, mod, cre)		\
}

/* Determine if soft dependencies are being done */
#define	DOINGSOFTDEP(vp)	((vp)->v_mount->mnt_flag & MNT_SOFTDEP)

/* This overlays the fid structure (see mount.h). */
struct ufid {
	u_int16_t ufid_len;	/* Length of structure. */
	u_int16_t ufid_pad;	/* Force 32-bit alignment. */
	ino_t	  ufid_ino;	/* File number (ino). */
	int32_t	  ufid_gen;	/* Generation number. */
};
#endif /* _KERNEL */

#endif /* !_UFS_UFS_INODE_H_ */
