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  * $FreeBSD$
   27  */
   28 
   29 #define UDF_HASHTBLSIZE 100
   30 
   31 struct udf_node {
   32         LIST_ENTRY(udf_node)    le;
   33         struct vnode    *i_vnode;
   34         struct vnode    *i_devvp;
   35         struct udf_mnt  *udfmp;
   36         struct cdev *i_dev;
   37         ino_t           hash_id;
   38         long            diroff;
   39         struct file_entry *fentry;
   40 };
   41 
   42 struct udf_mnt {
   43         int                     im_flags;
   44         struct mount            *im_mountp;
   45         struct cdev *im_dev;
   46         struct vnode            *im_devvp;
   47         int                     bsize;
   48         int                     bshift;
   49         int                     bmask;
   50         uint32_t                part_start;
   51         uint32_t                part_len;
   52         uint64_t                root_id;
   53         struct long_ad          root_icb;
   54         LIST_HEAD(udf_hash_lh, udf_node)        *hashtbl;
   55         u_long                  hashsz;
   56         struct mtx              hash_mtx;
   57         int                     p_sectors;
   58         int                     s_table_entries;
   59         struct udf_sparing_table *s_table;
   60         void                    *im_d2l;        /* disk->local iconv handle */
   61 #if 0
   62         void                    *im_l2d;        /* local->disk iconv handle */
   63 #endif
   64 };
   65 
   66 struct udf_dirstream {
   67         struct udf_node *node;
   68         struct udf_mnt  *udfmp;
   69         struct buf      *bp;
   70         uint8_t         *data;
   71         uint8_t         *buf;
   72         int             fsize;
   73         int             off;
   74         int             this_off;
   75         int             offset;
   76         int             size;
   77         int             error;
   78         int             fid_fragment;
   79 };
   80 
   81 #define VFSTOUDFFS(mp)  ((struct udf_mnt *)((mp)->mnt_data))
   82 #define VTON(vp)        ((struct udf_node *)((vp)->v_data))
   83 
   84 /*
   85  * The block layer refers to things in terms of 512 byte blocks by default.
   86  * btodb() is expensive, so speed things up.
   87  * XXX Can the block layer be forced to use a different block size?
   88  */
   89 #define RDSECTOR(devvp, sector, size, bp) \
   90         bread(devvp, sector << (udfmp->bshift - DEV_BSHIFT), size, NOCRED, bp)
   91 
   92 MALLOC_DECLARE(M_UDFFENTRY);
   93 
   94 static __inline int
   95 udf_readlblks(struct udf_mnt *udfmp, int sector, int size, struct buf **bp)
   96 {
   97         return (RDSECTOR(udfmp->im_devvp, sector,
   98                          (size + udfmp->bmask) & ~udfmp->bmask, bp));
   99 }
  100 
  101 static __inline int
  102 udf_readalblks(struct udf_mnt *udfmp, int lsector, int size, struct buf **bp)
  103 {
  104         daddr_t rablock, lblk;
  105         int rasize;
  106 
  107         lblk = (lsector + udfmp->part_start) << (udfmp->bshift - DEV_BSHIFT);
  108         rablock = (lblk + 1) << udfmp->bshift;
  109         rasize = size;
  110 
  111         return (breadn(udfmp->im_devvp, lblk,
  112                        (size + udfmp->bmask) & ~udfmp->bmask,
  113                        &rablock, &rasize, 1,  NOCRED, bp));
  114 }
  115 
  116 /*
  117  * Produce a suitable file number from an ICB.  The passed in ICB is expected
  118  * to be in little endian (meaning that it hasn't been swapped for big
  119  * endian machines yet).
  120  * XXX If the fileno resolves to 0, we might be in big trouble.
  121  * XXX Assumes the ICB is a long_ad.  This struct is compatible with short_ad,
  122  *     but not ext_ad.
  123  */
  124 static __inline ino_t
  125 udf_getid(struct long_ad *icb)
  126 {
  127         return (le32toh(icb->loc.lb_num));
  128 }
  129 
  130 int udf_allocv(struct mount *, struct vnode **, struct thread *);
  131 int udf_hashlookup(struct udf_mnt *, ino_t, int, struct vnode **);
  132 int udf_hashins(struct udf_node *);
  133 int udf_hashrem(struct udf_node *);
  134 int udf_checktag(struct desc_tag *, uint16_t);
  135 int udf_vget(struct mount *, ino_t, int, struct vnode **);
  136 
  137 extern uma_zone_t udf_zone_trans;
  138 extern uma_zone_t udf_zone_node;
  139 extern uma_zone_t udf_zone_ds;

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