The Design and Implementation of the FreeBSD Operating System, Second Edition
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FreeBSD/Linux Kernel Cross Reference
sys/fs/cd9660/iso.h

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    1 /*-
    2  * Copyright (c) 1994
    3  *      The Regents of the University of California.  All rights reserved.
    4  *
    5  * This code is derived from software contributed to Berkeley
    6  * by Pace Willisson (pace@blitz.com).  The Rock Ridge Extension
    7  * Support code is derived from software contributed to Berkeley
    8  * by Atsushi Murai (amurai@spec.co.jp).
    9  *
   10  * Redistribution and use in source and binary forms, with or without
   11  * modification, are permitted provided that the following conditions
   12  * are met:
   13  * 1. Redistributions of source code must retain the above copyright
   14  *    notice, this list of conditions and the following disclaimer.
   15  * 2. Redistributions in binary form must reproduce the above copyright
   16  *    notice, this list of conditions and the following disclaimer in the
   17  *    documentation and/or other materials provided with the distribution.
   18  * 4. Neither the name of the University nor the names of its contributors
   19  *    may be used to endorse or promote products derived from this software
   20  *    without specific prior written permission.
   21  *
   22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   32  * SUCH DAMAGE.
   33  *
   34  *      @(#)iso.h       8.6 (Berkeley) 5/10/95
   35  * $FreeBSD: releng/9.0/sys/fs/cd9660/iso.h 224290 2011-07-24 17:43:09Z mckusick $
   36  */
   37 
   38 #define ISODCL(from, to) (to - from + 1)
   39 
   40 struct iso_volume_descriptor {
   41         char type[ISODCL(1,1)]; /* 711 */
   42         char id[ISODCL(2,6)];
   43         char version[ISODCL(7,7)];
   44         char unused[ISODCL(8,8)];
   45         char type_sierra[ISODCL(9,9)]; /* 711 */
   46         char id_sierra[ISODCL(10,14)];
   47         char version_sierra[ISODCL(15,15)];
   48         char data[ISODCL(16,2048)];
   49 };
   50 
   51 /* volume descriptor types */
   52 #define ISO_VD_PRIMARY 1
   53 #define ISO_VD_SUPPLEMENTARY 2
   54 #define ISO_VD_END 255
   55 
   56 #define ISO_STANDARD_ID "CD001"
   57 #define ISO_ECMA_ID     "CDW01"
   58 
   59 #define ISO_SIERRA_ID   "CDROM"
   60 
   61 struct iso_primary_descriptor {
   62         char type                       [ISODCL (  1,   1)]; /* 711 */
   63         char id                         [ISODCL (  2,   6)];
   64         char version                    [ISODCL (  7,   7)]; /* 711 */
   65         char unused1                    [ISODCL (  8,   8)];
   66         char system_id                  [ISODCL (  9,  40)]; /* achars */
   67         char volume_id                  [ISODCL ( 41,  72)]; /* dchars */
   68         char unused2                    [ISODCL ( 73,  80)];
   69         char volume_space_size          [ISODCL ( 81,  88)]; /* 733 */
   70         char unused3                    [ISODCL ( 89, 120)];
   71         char volume_set_size            [ISODCL (121, 124)]; /* 723 */
   72         char volume_sequence_number     [ISODCL (125, 128)]; /* 723 */
   73         char logical_block_size         [ISODCL (129, 132)]; /* 723 */
   74         char path_table_size            [ISODCL (133, 140)]; /* 733 */
   75         char type_l_path_table          [ISODCL (141, 144)]; /* 731 */
   76         char opt_type_l_path_table      [ISODCL (145, 148)]; /* 731 */
   77         char type_m_path_table          [ISODCL (149, 152)]; /* 732 */
   78         char opt_type_m_path_table      [ISODCL (153, 156)]; /* 732 */
   79         char root_directory_record      [ISODCL (157, 190)]; /* 9.1 */
   80         char volume_set_id              [ISODCL (191, 318)]; /* dchars */
   81         char publisher_id               [ISODCL (319, 446)]; /* achars */
   82         char preparer_id                [ISODCL (447, 574)]; /* achars */
   83         char application_id             [ISODCL (575, 702)]; /* achars */
   84         char copyright_file_id          [ISODCL (703, 739)]; /* 7.5 dchars */
   85         char abstract_file_id           [ISODCL (740, 776)]; /* 7.5 dchars */
   86         char bibliographic_file_id      [ISODCL (777, 813)]; /* 7.5 dchars */
   87         char creation_date              [ISODCL (814, 830)]; /* 8.4.26.1 */
   88         char modification_date          [ISODCL (831, 847)]; /* 8.4.26.1 */
   89         char expiration_date            [ISODCL (848, 864)]; /* 8.4.26.1 */
   90         char effective_date             [ISODCL (865, 881)]; /* 8.4.26.1 */
   91         char file_structure_version     [ISODCL (882, 882)]; /* 711 */
   92         char unused4                    [ISODCL (883, 883)];
   93         char application_data           [ISODCL (884, 1395)];
   94         char unused5                    [ISODCL (1396, 2048)];
   95 };
   96 #define ISO_DEFAULT_BLOCK_SIZE          2048
   97 
   98 /*
   99  * Used by Microsoft Joliet extension to ISO9660. Almost the same
  100  * as PVD, but byte position 8 is a flag, and 89-120 is for escape.
  101  */
  102 
  103 struct iso_supplementary_descriptor {
  104       char type                       [ISODCL (  1,   1)]; /* 711 */
  105       char id                         [ISODCL (  2,   6)];
  106       char version                    [ISODCL (  7,   7)]; /* 711 */
  107       char flags                      [ISODCL (  8,   8)]; /* 711? */
  108       char system_id                  [ISODCL (  9,  40)]; /* achars */
  109       char volume_id                  [ISODCL ( 41,  72)]; /* dchars */
  110       char unused2                    [ISODCL ( 73,  80)];
  111       char volume_space_size          [ISODCL ( 81,  88)]; /* 733 */
  112       char escape                     [ISODCL ( 89, 120)];
  113       char volume_set_size            [ISODCL (121, 124)]; /* 723 */
  114       char volume_sequence_number     [ISODCL (125, 128)]; /* 723 */
  115       char logical_block_size         [ISODCL (129, 132)]; /* 723 */
  116       char path_table_size            [ISODCL (133, 140)]; /* 733 */
  117       char type_l_path_table          [ISODCL (141, 144)]; /* 731 */
  118       char opt_type_l_path_table      [ISODCL (145, 148)]; /* 731 */
  119       char type_m_path_table          [ISODCL (149, 152)]; /* 732 */
  120       char opt_type_m_path_table      [ISODCL (153, 156)]; /* 732 */
  121       char root_directory_record      [ISODCL (157, 190)]; /* 9.1 */
  122       char volume_set_id              [ISODCL (191, 318)]; /* dchars */
  123       char publisher_id               [ISODCL (319, 446)]; /* achars */
  124       char preparer_id                [ISODCL (447, 574)]; /* achars */
  125       char application_id             [ISODCL (575, 702)]; /* achars */
  126       char copyright_file_id          [ISODCL (703, 739)]; /* 7.5 dchars */
  127       char abstract_file_id           [ISODCL (740, 776)]; /* 7.5 dchars */
  128       char bibliographic_file_id      [ISODCL (777, 813)]; /* 7.5 dchars */
  129       char creation_date              [ISODCL (814, 830)]; /* 8.4.26.1 */
  130       char modification_date          [ISODCL (831, 847)]; /* 8.4.26.1 */
  131       char expiration_date            [ISODCL (848, 864)]; /* 8.4.26.1 */
  132       char effective_date             [ISODCL (865, 881)]; /* 8.4.26.1 */
  133       char file_structure_version     [ISODCL (882, 882)]; /* 711 */
  134       char unused4                    [ISODCL (883, 883)];
  135       char application_data           [ISODCL (884, 1395)];
  136       char unused5                    [ISODCL (1396, 2048)];
  137 };
  138 
  139 struct iso_sierra_primary_descriptor {
  140         char unknown1                   [ISODCL (  1,   8)]; /* 733 */
  141         char type                       [ISODCL (  9,   9)]; /* 711 */
  142         char id                         [ISODCL ( 10,  14)];
  143         char version                    [ISODCL ( 15,  15)]; /* 711 */
  144         char unused1                    [ISODCL ( 16,  16)];
  145         char system_id                  [ISODCL ( 17,  48)]; /* achars */
  146         char volume_id                  [ISODCL ( 49,  80)]; /* dchars */
  147         char unused2                    [ISODCL ( 81,  88)];
  148         char volume_space_size          [ISODCL ( 89,  96)]; /* 733 */
  149         char unused3                    [ISODCL ( 97, 128)];
  150         char volume_set_size            [ISODCL (129, 132)]; /* 723 */
  151         char volume_sequence_number     [ISODCL (133, 136)]; /* 723 */
  152         char logical_block_size         [ISODCL (137, 140)]; /* 723 */
  153         char path_table_size            [ISODCL (141, 148)]; /* 733 */
  154         char type_l_path_table          [ISODCL (149, 152)]; /* 731 */
  155         char opt_type_l_path_table      [ISODCL (153, 156)]; /* 731 */
  156         char unknown2                   [ISODCL (157, 160)]; /* 731 */
  157         char unknown3                   [ISODCL (161, 164)]; /* 731 */
  158         char type_m_path_table          [ISODCL (165, 168)]; /* 732 */
  159         char opt_type_m_path_table      [ISODCL (169, 172)]; /* 732 */
  160         char unknown4                   [ISODCL (173, 176)]; /* 732 */
  161         char unknown5                   [ISODCL (177, 180)]; /* 732 */
  162         char root_directory_record      [ISODCL (181, 214)]; /* 9.1 */
  163         char volume_set_id              [ISODCL (215, 342)]; /* dchars */
  164         char publisher_id               [ISODCL (343, 470)]; /* achars */
  165         char preparer_id                [ISODCL (471, 598)]; /* achars */
  166         char application_id             [ISODCL (599, 726)]; /* achars */
  167         char copyright_id               [ISODCL (727, 790)]; /* achars */
  168         char creation_date              [ISODCL (791, 806)]; /* ? */
  169         char modification_date          [ISODCL (807, 822)]; /* ? */
  170         char expiration_date            [ISODCL (823, 838)]; /* ? */
  171         char effective_date             [ISODCL (839, 854)]; /* ? */
  172         char file_structure_version     [ISODCL (855, 855)]; /* 711 */
  173         char unused4                    [ISODCL (856, 2048)];
  174 };
  175 
  176 struct iso_directory_record {
  177         char length                     [ISODCL (1, 1)]; /* 711 */
  178         char ext_attr_length            [ISODCL (2, 2)]; /* 711 */
  179         u_char extent                   [ISODCL (3, 10)]; /* 733 */
  180         u_char size                     [ISODCL (11, 18)]; /* 733 */
  181         char date                       [ISODCL (19, 25)]; /* 7 by 711 */
  182         char flags                      [ISODCL (26, 26)];
  183         char file_unit_size             [ISODCL (27, 27)]; /* 711 */
  184         char interleave                 [ISODCL (28, 28)]; /* 711 */
  185         char volume_sequence_number     [ISODCL (29, 32)]; /* 723 */
  186         char name_len                   [ISODCL (33, 33)]; /* 711 */
  187         char name                       [1];                    /* XXX */
  188 };
  189 /* can't take sizeof(iso_directory_record), because of possible alignment
  190    of the last entry (34 instead of 33) */
  191 #define ISO_DIRECTORY_RECORD_SIZE       33
  192 
  193 struct iso_extended_attributes {
  194         u_char owner                    [ISODCL (1, 4)]; /* 723 */
  195         u_char group                    [ISODCL (5, 8)]; /* 723 */
  196         u_char perm                     [ISODCL (9, 10)]; /* 9.5.3 */
  197         char ctime                      [ISODCL (11, 27)]; /* 8.4.26.1 */
  198         char mtime                      [ISODCL (28, 44)]; /* 8.4.26.1 */
  199         char xtime                      [ISODCL (45, 61)]; /* 8.4.26.1 */
  200         char ftime                      [ISODCL (62, 78)]; /* 8.4.26.1 */
  201         char recfmt                     [ISODCL (79, 79)]; /* 711 */
  202         char recattr                    [ISODCL (80, 80)]; /* 711 */
  203         u_char reclen                   [ISODCL (81, 84)]; /* 723 */
  204         char system_id                  [ISODCL (85, 116)]; /* achars */
  205         char system_use                 [ISODCL (117, 180)];
  206         char version                    [ISODCL (181, 181)]; /* 711 */
  207         char len_esc                    [ISODCL (182, 182)]; /* 711 */
  208         char reserved                   [ISODCL (183, 246)];
  209         u_char len_au                   [ISODCL (247, 250)]; /* 723 */
  210 };
  211 
  212 #ifdef _KERNEL
  213 
  214 /* CD-ROM Format type */
  215 enum ISO_FTYPE  { ISO_FTYPE_DEFAULT, ISO_FTYPE_9660, ISO_FTYPE_RRIP,
  216                   ISO_FTYPE_JOLIET, ISO_FTYPE_ECMA, ISO_FTYPE_HIGH_SIERRA };
  217 
  218 #ifndef ISOFSMNT_ROOT
  219 #define ISOFSMNT_ROOT   0
  220 #endif
  221 
  222 struct iso_mnt {
  223         uint64_t im_flags;
  224 
  225         struct mount *im_mountp;
  226         struct cdev *im_dev;
  227         struct vnode *im_devvp;
  228 
  229         struct g_consumer *im_cp;
  230         struct bufobj *im_bo;
  231 
  232         int logical_block_size;
  233         int im_bshift;
  234         int im_bmask;
  235 
  236         int volume_space_size;
  237 
  238         char root[ISODCL (157, 190)];
  239         int root_extent;
  240         int root_size;
  241         enum ISO_FTYPE  iso_ftype;
  242 
  243         int rr_skip;
  244         int rr_skip0;
  245 
  246         int joliet_level;
  247 
  248         void *im_d2l;
  249         void *im_l2d;
  250 };
  251 
  252 struct ifid {
  253         u_short ifid_len;
  254         u_short ifid_pad;
  255         int     ifid_ino;
  256         long    ifid_start;
  257 };
  258 
  259 #define VFSTOISOFS(mp)  ((struct iso_mnt *)((mp)->mnt_data))
  260 
  261 #define blkoff(imp, loc)        ((loc) & (imp)->im_bmask)
  262 #define lblktosize(imp, blk)    ((blk) << (imp)->im_bshift)
  263 #define lblkno(imp, loc)        ((loc) >> (imp)->im_bshift)
  264 #define blksize(imp, ip, lbn)   ((imp)->logical_block_size)
  265 
  266 int cd9660_vget_internal(struct mount *, ino_t, int, struct vnode **, int,
  267                          struct iso_directory_record *);
  268 #define cd9660_sysctl ((int (*)(int *, u_int, void *, size_t *, void *, \
  269                                 size_t, struct proc *))eopnotsupp)
  270 
  271 extern struct vop_vector cd9660_vnodeops;
  272 extern struct vop_vector cd9660_fifoops;
  273 
  274 int isochar(u_char *, u_char *, int, u_short *, int *, int, void *);
  275 int isofncmp(u_char *, int, u_char *, int, int, int, void *, void *);
  276 void isofntrans(u_char *, int, u_char *, u_short *, int, int, int, int, void *);
  277 ino_t isodirino(struct iso_directory_record *, struct iso_mnt *);
  278 u_short sgetrune(const char *, size_t, char const **, int, void *);
  279 
  280 #endif /* _KERNEL */
  281 
  282 /*
  283  * The isonum_xxx functions are inlined anyway, and could come handy even
  284  * outside the kernel.  Thus we don't hide them here.
  285  */
  286 
  287 /*
  288  * 7xy
  289  *  x -> 1 = 8 bits, 2 = 16 bits, 3 = 32 bits
  290  *   y -> 1 = little-endian, 2 = big-endian, 3 = both (le then be)
  291  */
  292 
  293 static __inline uint8_t
  294 isonum_711(unsigned char *p)
  295 {
  296         return p[0];
  297 }
  298 
  299 static __inline uint8_t
  300 isonum_712(unsigned char *p)
  301 {
  302         return p[0];
  303 }
  304 
  305 static __inline uint8_t
  306 isonum_713(unsigned char *p)
  307 {
  308         return p[0];
  309 }
  310 
  311 static __inline uint16_t
  312 isonum_721(unsigned char *p)
  313 {
  314         return (p[0] | p[1] << 8);
  315 }
  316 
  317 static __inline uint16_t
  318 isonum_722(unsigned char *p)
  319 {
  320         return (p[1] | p[0] << 8);
  321 }
  322 
  323 static __inline uint16_t
  324 isonum_723(unsigned char *p)
  325 {
  326         return (p[0] | p[1] << 8);
  327 }
  328 
  329 static __inline uint32_t
  330 isonum_731(unsigned char *p)
  331 {
  332         return (p[0] | p[1] << 8 | p[2] << 16 | p[3] << 24);
  333 }
  334 
  335 static __inline uint32_t
  336 isonum_732(unsigned char *p)
  337 {
  338         return (p[3] | p[2] << 8 | p[1] << 16 | p[0] << 24);
  339 }
  340 
  341 static __inline uint32_t
  342 isonum_733(unsigned char *p)
  343 {
  344         return (p[0] | p[1] << 8 | p[2] << 16 | p[3] << 24);
  345 }
  346 
  347 /*
  348  * Associated files have a leading '='.
  349  */
  350 #define ASSOCCHAR       '='

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