/*-
 * 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 1.6 2003/11/05 06:56:08 scottl Exp $
 */

#define UDF_HASHTBLSIZE 100

struct udf_node {
        LIST_ENTRY(udf_node)    le;
        struct vnode    *i_vnode;
        struct vnode    *i_devvp;
        struct udf_mnt  *udfmp;
        cdev_t          i_dev;
        ino_t           hash_id;
        long            diroff;
        struct file_entry *fentry;
};

struct udf_mnt {
        int                     im_flags;
        struct mount            *im_mountp;
        cdev_t                  im_dev;
        struct vnode            *im_devvp;
        struct netexport        im_export;
        int                     bsize;
        int                     bshift;
        int                     bmask;
        uint32_t                part_start;
        uint32_t                part_len;
        uint64_t                root_id;
        struct vnode            *root_vp;
        struct long_ad          root_icb;
        LIST_HEAD(udf_hash_lh, udf_node)        *hashtbl;
        u_long                  hashsz;
        struct lwkt_token       hash_token;
        int                     p_sectors;
        int                     s_table_entries;
        struct udf_sparing_table *s_table;
};

struct udf_dirstream {
        struct udf_node *node;
        struct udf_mnt  *udfmp;
        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 udf_mnt *)((mp)->mnt_data))
#define VTON(vp)        ((struct udf_node *)((vp)->v_data))

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

#ifdef MALLOC_DECLARE
MALLOC_DECLARE(M_UDFFENTRY);
MALLOC_DECLARE(M_UDFNODE);
#endif

static __inline int
udf_readlblks(struct udf_mnt *udfmp, int sector, int size, struct buf **bp)
{
        return (RDSECTOR(udfmp->im_devvp, sector,
                         (size + udfmp->bmask) & ~udfmp->bmask, bp));
}

static __inline int
udf_readalblks(struct udf_mnt *udfmp, int lsector, int size, struct buf **bp)
{
        off_t raoffset;
        off_t loffset;
        int rasize;

        loffset = (off_t)(lsector + udfmp->part_start) << udfmp->bshift;
        raoffset = loffset + (1 << udfmp->bshift);
        rasize = size;

        return (breadn(udfmp->im_devvp, loffset,
                       (size + udfmp->bmask) & ~udfmp->bmask,
                       &raoffset, &rasize, 1, bp));
}

/*
 * Produce a suitable file number from an ICB.
 * XXX If the fileno resolves to 0, we might be in big trouble.
 * XXX Assumes the ICB is a long_ad.  This struct is compatible with short_ad,
 *     but not ext_ad.
 */
static __inline ino_t
udf_getid(struct long_ad *icb)
{
        return (icb->loc.lb_num);
}

int udf_allocv(struct mount *, struct vnode **);
int udf_hashlookup(struct udf_mnt *, ino_t, struct vnode **);
int udf_hashins(struct udf_node *);
int udf_hashrem(struct udf_node *);
int udf_checktag(struct desc_tag *, uint16_t);
int udf_vget(struct mount *, struct vnode *, ino_t, struct vnode **);