The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/fs/udf/udf.h

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    1 /*-
    2  * Copyright (c) 2001, 2002 Scott Long <scottl@freebsd.org>
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  *
   14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   24  * SUCH DAMAGE.
   25  *
   26  * $FreeBSD: releng/6.0/sys/fs/udf/udf.h 143686 2005-03-16 08:09:52Z phk $
   27  */
   28 
   29 #define UDF_HASHTBLSIZE 100
   30 
   31 struct udf_node {
   32         struct vnode    *i_vnode;
   33         struct udf_mnt  *udfmp;
   34         ino_t           hash_id;
   35         long            diroff;
   36         struct file_entry *fentry;
   37 };
   38 
   39 struct udf_mnt {
   40         int                     im_flags;
   41         struct mount            *im_mountp;
   42         struct g_consumer       *im_cp;
   43         struct bufobj           *im_bo;
   44         struct cdev *im_dev;
   45         struct vnode            *im_devvp;
   46         int                     bsize;
   47         int                     bshift;
   48         int                     bmask;
   49         uint32_t                part_start;
   50         uint32_t                part_len;
   51         uint64_t                root_id;
   52         struct long_ad          root_icb;
   53         int                     p_sectors;
   54         int                     s_table_entries;
   55         struct udf_sparing_table *s_table;
   56         void                    *im_d2l;        /* disk->local iconv handle */
   57 #if 0
   58         void                    *im_l2d;        /* local->disk iconv handle */
   59 #endif
   60 };
   61 
   62 struct udf_dirstream {
   63         struct udf_node *node;
   64         struct udf_mnt  *udfmp;
   65         struct buf      *bp;
   66         uint8_t         *data;
   67         uint8_t         *buf;
   68         int             fsize;
   69         int             off;
   70         int             this_off;
   71         int             offset;
   72         int             size;
   73         int             error;
   74         int             fid_fragment;
   75 };
   76 
   77 #define VFSTOUDFFS(mp)  ((struct udf_mnt *)((mp)->mnt_data))
   78 #define VTON(vp)        ((struct udf_node *)((vp)->v_data))
   79 
   80 /*
   81  * The block layer refers to things in terms of 512 byte blocks by default.
   82  * btodb() is expensive, so speed things up.
   83  * XXX Can the block layer be forced to use a different block size?
   84  */
   85 #define RDSECTOR(devvp, sector, size, bp) \
   86         bread(devvp, sector << (udfmp->bshift - DEV_BSHIFT), size, NOCRED, bp)
   87 
   88 MALLOC_DECLARE(M_UDFFENTRY);
   89 
   90 static __inline int
   91 udf_readlblks(struct udf_mnt *udfmp, int sector, int size, struct buf **bp)
   92 {
   93         return (RDSECTOR(udfmp->im_devvp, sector,
   94                          (size + udfmp->bmask) & ~udfmp->bmask, bp));
   95 }
   96 
   97 static __inline int
   98 udf_readalblks(struct udf_mnt *udfmp, int lsector, int size, struct buf **bp)
   99 {
  100         daddr_t rablock, lblk;
  101         int rasize;
  102 
  103         lblk = (lsector + udfmp->part_start) << (udfmp->bshift - DEV_BSHIFT);
  104         rablock = (lblk + 1) << udfmp->bshift;
  105         rasize = size;
  106 
  107         return (breadn(udfmp->im_devvp, lblk,
  108                        (size + udfmp->bmask) & ~udfmp->bmask,
  109                        &rablock, &rasize, 1,  NOCRED, bp));
  110 }
  111 
  112 /*
  113  * Produce a suitable file number from an ICB.  The passed in ICB is expected
  114  * to be in little endian (meaning that it hasn't been swapped for big
  115  * endian machines yet).
  116  * XXX If the fileno resolves to 0, we might be in big trouble.
  117  * XXX Assumes the ICB is a long_ad.  This struct is compatible with short_ad,
  118  *     but not ext_ad.
  119  */
  120 static __inline ino_t
  121 udf_getid(struct long_ad *icb)
  122 {
  123         return (le32toh(icb->loc.lb_num));
  124 }
  125 
  126 int udf_allocv(struct mount *, struct vnode **, struct thread *);
  127 int udf_checktag(struct desc_tag *, uint16_t);
  128 int udf_vget(struct mount *, ino_t, int, struct vnode **);
  129 
  130 extern uma_zone_t udf_zone_trans;
  131 extern uma_zone_t udf_zone_node;
  132 extern uma_zone_t udf_zone_ds;

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