sys/fs/adosfs/adosfs.h

   1 /*      $NetBSD: adosfs.h,v 1.10 2009/03/14 14:46:09 dsl Exp $  */
   2
   3 /*
   4  * Copyright (c) 1994 Christian E. Hopps
   5  * Copyright (c) 1996 Matthias Scheler
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. All advertising materials mentioning features or use of this software
  17  *    must display the following acknowledgement:
  18  *      This product includes software developed by Christian E. Hopps.
  19  * 4. The name of the author may not be used to endorse or promote products
  20  *    derived from this software without specific prior written permission
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  23  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  24  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  25  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  26  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  27  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  28  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  29  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  30  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  31  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32  */
  33
  34 #ifndef _ADOSFS_ADOSFS_H_
  35 #define  _ADOSFS_ADOSFS_H_
  36 /*
  37  * Arguments to mount amigados filesystems.
  38  */
  39 struct adosfs_args {
  40         char    *fspec;         /* blocks special holding the fs to mount */
  41         struct  export_args30 _pad1; /* compat with old userland tools */
  42         uid_t   uid;            /* uid that owns adosfs files */
  43         gid_t   gid;            /* gid that owns adosfs files */
  44         mode_t  mask;           /* mask to be applied for adosfs perms */
  45 };
  46
  47 #ifdef _KERNEL
  48 #include <sys/mallocvar.h>
  49 #include <miscfs/genfs/genfs_node.h>
  50
  51 MALLOC_DECLARE(M_ANODE);
  52
  53 /*
  54  * Amigados datestamp. (from 1/1/1978 00:00:00 local)
  55  */
  56 struct datestamp {
  57         u_int32_t days;
  58         u_int32_t mins;
  59         u_int32_t ticks;        /* 20000 * (ticks % 50) = useconds */
  60                                 /* ticks / 50 = seconds */
  61 };
  62
  63 enum anode_type { AROOT, ADIR, AFILE, ALDIR, ALFILE, ASLINK };
  64
  65 /* Maximum file/directory name */
  66 #define ADMAXNAMELEN            30
  67
  68 /*
  69  * similar to inode's, we use to represent:
  70  * the root dir, reg dirs, reg files and extension blocks
  71  * note the ``tab'' is a hash table for r/d, and a data block
  72  * table for f/e. it is always ANODETABSZ(ap) bytes in size.
  73  */
  74 struct anode {
  75         struct genfs_node gnode;
  76         LIST_ENTRY(anode) link;
  77         enum anode_type type;
  78         char name[ADMAXNAMELEN+1];      /* (r/d/f) name for object */
  79         struct datestamp mtimev;        /* (r) volume modified */
  80         struct datestamp created;       /* (r) volume created */
  81         struct datestamp mtime; /* (r/d/f) last modified */
  82         struct adosfsmount *amp;        /* owner file system */
  83         struct vnode *vp;       /* owner vnode */
  84         u_long fsize;           /* (f) size of file in bytes */
  85         u_long block;           /* block num */
  86         u_long pblock;          /* (d/f/e) parent block */
  87         u_long hashf;           /* (d/f) hash forward */
  88         u_long extb;            /* (f/e) extension block number */
  89         u_long linkto;          /* (hd/hf) header this link points at */
  90         u_long linknext;        /* (d/f/hd/hf) next link (or head) in chain */
  91         u_long lastlindblk;     /* (f/hf) last logical indirect block */
  92         u_long lastindblk;      /* (f/hf) last indirect block read */
  93         u_long *tab;            /* (r/d) hash table */
  94         int *tabi;              /* (r/d) table info */
  95         int ntabent;            /* (r/d) number of entries in table */
  96         int nwords;             /* size of blocks in long words */
  97         int adprot;             /* (d/f) amigados protection bits */
  98         uid_t  uid;             /* (d/f) uid of directory/file */
  99         gid_t  gid;             /* (d/f) gid of directory/file */
 100         int flags;              /* misc flags */
 101         char *slinkto;          /* name of file or dir */
 102 };
 103 #define VTOA(vp)                ((struct anode *)(vp)->v_data)
 104 #define ATOV(ap)                ((ap)->vp)
 105 #define ANODETABSZ(ap)          (((ap)->nwords - 56) * sizeof(long))
 106 #define ANODETABENT(ap)         ((ap)->nwords - 56)
 107 #define ANODENDATBLKENT(ap)     ((ap)->nwords - 56)
 108
 109 /*
 110  * mount data
 111  */
 112 #define ANODEHASHSZ (512)
 113
 114 struct adosfsmount {
 115         LIST_HEAD(anodechain, anode) anodetab[ANODEHASHSZ];
 116         struct mount *mp;       /* owner mount */
 117         u_int32_t dostype;      /* type of volume */
 118         u_long rootb;           /* root block number */
 119         u_long secsperblk;      /* sectors per block */
 120         u_long bsize;           /* size of blocks */
 121         u_long nwords;          /* size of blocks in long words */
 122         u_long dbsize;          /* data bytes per block */
 123         uid_t  uid;             /* uid of mounting user */
 124         gid_t  gid;             /* gid of mounting user */
 125         u_long mask;            /* mode mask */
 126         struct vnode *devvp;    /* blk device mounted on */
 127         struct vnode *rootvp;   /* out root vnode */
 128         u_long *bitmap;         /* allocation bitmap */
 129         u_long numblks;         /* number of usable blocks */
 130         u_long freeblks;        /* number of free blocks */
 131 };
 132
 133 #define VFSTOADOSFS(mp) ((struct adosfsmount *)(mp)->mnt_data)
 134
 135 #define IS_FFS(amp)     ((amp)->dostype & 1)
 136 #define IS_INTER(amp)   (((amp)->dostype & 7) > 1)
 137
 138 /*
 139  * AmigaDOS block stuff.
 140  */
 141 #define BBOFF           (0)
 142
 143 #define BPT_SHORT       ((u_int32_t)2)
 144 #define BPT_DATA        ((u_int32_t)8)
 145 #define BPT_LIST        ((u_int32_t)16)
 146
 147 #define BST_RDIR        ((u_int32_t)1)
 148 #define BST_UDIR        ((u_int32_t)2)
 149 #define BST_SLINK       ((u_int32_t)3)
 150 #define BST_LDIR        ((u_int32_t)4)
 151 #define BST_FILE        ((u_int32_t)-3)
 152 #define BST_LFILE       ((u_int32_t)-4)
 153
 154 #define OFS_DATA_OFFSET (24)
 155
 156 extern struct pool adosfs_node_pool;
 157
 158 /*
 159  * utility protos
 160  */
 161 #if BYTE_ORDER != BIG_ENDIAN
 162 u_int32_t adoswordn(struct buf *, int);
 163 #else
 164 #define adoswordn(bp,wn) (*((u_int32_t *)(bp)->b_data + (wn)))
 165 #endif
 166
 167 u_int32_t adoscksum(struct buf *, int);
 168 int adoscaseequ(const u_char *, const u_char *, int, int);
 169 int adoshash(const u_char *, int, int, int);
 170 int adunixprot(int);
 171 int adosfs_getblktype(struct adosfsmount *, struct buf *);
 172
 173 struct vnode *adosfs_ahashget(struct mount *, ino_t);
 174 void adosfs_ainshash(struct adosfsmount *, struct anode *);
 175 void adosfs_aremhash(struct anode *);
 176
 177 int adosfs_lookup(void *);
 178
 179 extern int (**adosfs_vnodeop_p)(void *);
 180
 181 /* Should print a vnode or the vnode-op's arguments? */
 182 #define advopprint(p) /* XXX */
 183
 184 #endif /* _KERNEL */
 185 #endif /* _ADOSFS_ADOSFS_H_ */