/*      $NetBSD: adosfs.h,v 1.13 2014/08/05 08:50:54 hannken Exp $      */

/*
* Copyright (c) 1994 Christian E. Hopps
* Copyright (c) 1996 Matthias Scheler
* 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.
* 3. All advertising materials mentioning features or use of this software
*    must display the following acknowledgement:
*      This product includes software developed by Christian E. Hopps.
* 4. The name of the author may not be used to endorse or promote products
*    derived from this software without specific prior written permission
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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.
*/

#ifndef _ADOSFS_ADOSFS_H_
#define  _ADOSFS_ADOSFS_H_
/*
* Arguments to mount amigados filesystems.
*/
struct adosfs_args {
       char    *fspec;         /* blocks special holding the fs to mount */
       struct  export_args30 _pad1; /* compat with old userland tools */
       uid_t   uid;            /* uid that owns adosfs files */
       gid_t   gid;            /* gid that owns adosfs files */
       mode_t  mask;           /* mask to be applied for adosfs perms */
};

#ifdef _KERNEL
#include <sys/mallocvar.h>
#include <miscfs/genfs/genfs_node.h>

MALLOC_DECLARE(M_ANODE);

/*
* Amigados datestamp. (from 1/1/1978 00:00:00 local)
*/
struct datestamp {
       u_int32_t days;
       u_int32_t mins;
       u_int32_t ticks;        /* 20000 * (ticks % 50) = useconds */
                               /* ticks / 50 = seconds */
};

enum anode_type { AROOT, ADIR, AFILE, ALDIR, ALFILE, ASLINK };

/* Maximum file/directory name */
#define ADMAXNAMELEN            30

/*
* similar to inode's, we use to represent:
* the root dir, reg dirs, reg files and extension blocks
* note the ``tab'' is a hash table for r/d, and a data block
* table for f/e. it is always ANODETABSZ(ap) bytes in size.
*/
struct anode {
       struct genfs_node gnode;
       enum anode_type type;
       char name[ADMAXNAMELEN+1];      /* (r/d/f) name for object */
       struct datestamp mtimev;        /* (r) volume modified */
       struct datestamp created;       /* (r) volume created */
       struct datestamp mtime; /* (r/d/f) last modified */
       struct adosfsmount *amp;        /* owner file system */
       struct vnode *vp;       /* owner vnode */
       u_long fsize;           /* (f) size of file in bytes */
       u_long block;           /* block num */
       u_long pblock;          /* (d/f/e) parent block */
       u_long hashf;           /* (d/f) hash forward */
       u_long extb;            /* (f/e) extension block number */
       u_long linkto;          /* (hd/hf) header this link points at */
       u_long linknext;        /* (d/f/hd/hf) next link (or head) in chain */
       u_long lastlindblk;     /* (f/hf) last logical indirect block */
       u_long lastindblk;      /* (f/hf) last indirect block read */
       u_long *tab;            /* (r/d) hash table */
       int *tabi;              /* (r/d) table info */
       int ntabent;            /* (r/d) number of entries in table */
       int nwords;             /* size of blocks in long words */
       int adprot;             /* (d/f) amigados protection bits */
       uid_t  uid;             /* (d/f) uid of directory/file */
       gid_t  gid;             /* (d/f) gid of directory/file */
       int flags;              /* misc flags */
       char *slinkto;          /* name of file or dir */
};
#define VTOA(vp)                ((struct anode *)(vp)->v_data)
#define ATOV(ap)                ((ap)->vp)
#define ANODETABSZ(ap)          (((ap)->nwords - 56) * sizeof(long))
#define ANODETABENT(ap)         ((ap)->nwords - 56)
#define ANODENDATBLKENT(ap)     ((ap)->nwords - 56)

/*
* mount data
*/
#define ANODEHASHSZ (512)

struct adosfsmount {
       struct mount *mp;       /* owner mount */
       u_int32_t dostype;      /* type of volume */
       u_long rootb;           /* root block number */
       u_long bsize;           /* size of blocks */
       u_long nwords;          /* size of blocks in long words */
       u_long dbsize;          /* data bytes per block */
       uid_t  uid;             /* uid of mounting user */
       gid_t  gid;             /* gid of mounting user */
       u_long mask;            /* mode mask */
       struct vnode *devvp;    /* blk device mounted on */
       struct vnode *rootvp;   /* out root vnode */
       u_long *bitmap;         /* allocation bitmap */
       u_long numblks;         /* number of usable blocks */
       u_long freeblks;        /* number of free blocks */
};

#define VFSTOADOSFS(mp) ((struct adosfsmount *)(mp)->mnt_data)

#define IS_FFS(amp)     ((amp)->dostype & 1)
#define IS_INTER(amp)   (((amp)->dostype & 7) > 1)

/*
* AmigaDOS block stuff.
*/
#define BBOFF           (0)

#define BPT_SHORT       ((u_int32_t)2)
#define BPT_DATA        ((u_int32_t)8)
#define BPT_LIST        ((u_int32_t)16)

#define BST_RDIR        ((u_int32_t)1)
#define BST_UDIR        ((u_int32_t)2)
#define BST_SLINK       ((u_int32_t)3)
#define BST_LDIR        ((u_int32_t)4)
#define BST_FILE        ((u_int32_t)-3)
#define BST_LFILE       ((u_int32_t)-4)

#define OFS_DATA_OFFSET (24)

extern struct pool adosfs_node_pool;

/*
* utility protos
*/
#if BYTE_ORDER != BIG_ENDIAN
u_int32_t adoswordn(struct buf *, int);
#else
#define adoswordn(bp,wn) (*((u_int32_t *)(bp)->b_data + (wn)))
#endif

u_int32_t adoscksum(struct buf *, int);
int adoscaseequ(const u_char *, const u_char *, int, int);
int adoshash(const u_char *, int, int, int);
int adunixprot(int);
int adosfs_getblktype(struct adosfsmount *, struct buf *);

int adosfs_lookup(void *);

extern int (**adosfs_vnodeop_p)(void *);

/* Should print a vnode or the vnode-op's arguments? */
#define advopprint(p) /* XXX */

#endif /* _KERNEL */
#endif /* _ADOSFS_ADOSFS_H_ */

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