/*      $OpenBSD: udf.h,v 1.21 2016/06/19 11:54:33 natano Exp $ */

/*
 * Copyright (c) 2001, 2002 Scott Long <scottl@freebsd.org>
 * 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
 *
 * $FreeBSD: src/sys/fs/udf/udf.h,v 1.9 2004/10/29 10:40:58 phk Exp $
 */

/*
 * Ported to OpenBSD by Pedro Martelletto in February 2005.
 */

#define UDF_HASHTBLSIZE 100

typedef uint32_t udfino_t;

struct unode {
        LIST_ENTRY(unode) u_le;
        struct vnode *u_vnode;
        struct vnode *u_devvp;
        struct umount *u_ump;
        struct rrwlock u_lock;
        dev_t u_dev;
        udfino_t u_ino;
        union {
                long u_diroff;
                long u_vatlen;
        } un_u;
        struct extfile_entry *u_fentry;
};

#define u_diroff        un_u.u_diroff
#define u_vatlen        un_u.u_vatlen

struct umount {
        int um_flags;
        struct mount *um_mountp;
        struct vnode *um_devvp;
        dev_t um_dev;
        int um_bsize;
        int um_bshift;
        int um_bmask;
        uint32_t um_start;
        uint32_t um_realstart;
        uint32_t um_len;
        uint32_t um_reallen;
        uint32_t um_meta_start;
        uint32_t um_meta_len;
        struct unode *um_vat;
        struct long_ad um_root_icb;
        LIST_HEAD(udf_hash_lh, unode) *um_hashtbl;
        SIPHASH_KEY um_hashkey;
        u_long um_hashsz;
        struct mutex um_hashmtx;
        int um_psecs;
        int um_stbl_len;
        struct udf_sparing_table *um_stbl;
};

#define UDF_MNT_FIND_VAT        0x01    /* Indicates a VAT must be found */
#define UDF_MNT_USES_VAT        0x02    /* Indicates a VAT must be used */
#define UDF_MNT_USES_META       0x04    /* Indicates we are using a Metadata partition*/

#define VTOU(vp)        ((struct unode *)((vp)->v_data))

#ifdef _KERNEL

struct udf_dirstream {
        struct unode    *node;
        struct umount   *ump;
        struct buf      *bp;
        uint8_t         *data;
        uint8_t         *buf;
        int             fsize;
        int             off;
        int             this_off;
        int             offset;
        int             size;
        int             error;
        int             fid_fragment;
};

#define VFSTOUDFFS(mp)  ((struct umount *)((mp)->mnt_data))

/*
 * The block layer refers to things in terms of 512 byte blocks by default.
 * btodb() is expensive, so speed things up.
 * Can the block layer be forced to use a different block size?
 */
#define RDSECTOR(devvp, sector, size, bp) \
        bread(devvp, \
                ((daddr_t)(sector) << ump->um_bshift) / DEV_BSIZE, size, bp)

static __inline int
udf_readlblks(struct umount *ump, int sector, int size, struct buf **bp)
{
        return (RDSECTOR(ump->um_devvp, sector,
                         (size + ump->um_bmask) & ~ump->um_bmask, bp));
}

/*
 * Produce a suitable file number from an ICB.  The passed in ICB is expected
 * to be in little endian (meaning that it hasn't been swapped for big
 * endian machines yet).
 * If the fileno resolves to 0, we might be in big trouble.
 * Assumes the ICB is a long_ad.  This struct is compatible with short_ad,
 *     but not ext_ad.
 */
static __inline udfino_t
udf_getid(struct long_ad *icb)
{
        return (letoh32(icb->loc.lb_num));
}

int udf_allocv(struct mount *, struct vnode **, struct proc *);
int udf_hashlookup(struct umount *, udfino_t, int, struct vnode **);
int udf_hashins(struct unode *);
int udf_hashrem(struct unode *);
int udf_checktag(struct desc_tag *, uint16_t);

typedef uint16_t unicode_t;

#endif /* _KERNEL */