xref: /freebsd/sys/fs/cd9660/cd9660_node.h (revision 96e69c8e3167a57b8b37317796eba3068d12a771)

/*-
 * SPDX-License-Identifier: BSD-3-Clause
 *
 * Copyright (c) 1994
 *	The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley
 * by Pace Willisson (pace@blitz.com).  The Rock Ridge Extension
 * Support code is derived from software contributed to Berkeley
 * by Atsushi Murai (amurai@spec.co.jp).
 *
 * 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.
 */

/*
 * Theoretically, directories can be more than 2Gb in length,
 * however, in practice this seems unlikely. So, we define
 * the type doff_t as a long to keep down the cost of doing
 * lookup on a 32-bit machine. If you are porting to a 64-bit
 * architecture, you should make doff_t the same as off_t.
 */
#define doff_t	long

typedef	struct	{
	struct timespec	iso_atime;	/* time of last access */
	struct timespec	iso_mtime;	/* time of last modification */
	struct timespec	iso_ctime;	/* time file changed */
	u_short		iso_mode;	/* files access mode and type */
	uid_t		iso_uid;	/* owner user id */
	gid_t		iso_gid;	/* owner group id */
	short		iso_links;	/* links of file */
	dev_t		iso_rdev;	/* Major/Minor number for special */
} ISO_RRIP_INODE;

struct iso_node {
	struct	vnode *i_vnode;	/* vnode associated with this inode */
	ino_t	i_number;	/* the identity of the inode */
				/* we use the actual starting block of the file */
	struct	iso_mnt *i_mnt;	/* filesystem associated with this inode */
	struct	lockf *i_lockf;	/* head of byte-level lock list */
	doff_t	i_endoff;	/* end of useful stuff in directory */
	doff_t	i_diroff;	/* offset in dir, where we found last entry */

	long iso_extent;	/* extent of file */
	unsigned long i_size;
	long iso_start;		/* actual start of data of file (may be different */
				/* from iso_extent, if file has extended attributes) */
	ISO_RRIP_INODE	inode;
};

#define	i_forw		i_chain[0]
#define	i_back		i_chain[1]

#define VTOI(vp) ((struct iso_node *)(vp)->v_data)
#define ITOV(ip) ((ip)->i_vnode)

#ifdef _KERNEL

#ifdef MALLOC_DECLARE
MALLOC_DECLARE(M_ISOFSMNT);
MALLOC_DECLARE(M_ISOFSNODE);
#endif

struct buf;
struct vop_bmap_args;
struct vop_cachedlookup_args;
struct vop_inactive_args;
struct vop_reclaim_args;

/*
 * Prototypes for ISOFS vnode operations
 */
int cd9660_lookup(struct vop_cachedlookup_args *);
int cd9660_inactive(struct vop_inactive_args *);
int cd9660_reclaim(struct vop_reclaim_args *);
int cd9660_bmap(struct vop_bmap_args *);
int cd9660_blkatoff(struct vnode *vp, off_t offset, char **res, struct buf **bpp);

void cd9660_defattr(struct iso_directory_record *,
			struct iso_node *, struct buf *, enum ISO_FTYPE);
void cd9660_deftstamp(struct iso_directory_record *,
			struct iso_node *, struct buf *, enum ISO_FTYPE);
int cd9660_tstamp_conv7(u_char *, struct timespec *, enum ISO_FTYPE);
int cd9660_tstamp_conv17(u_char *, struct timespec *);

#endif /* _KERNEL */