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iso_fs.h

iso_fs.h 6.3 KB
Cronologia Originale

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  1. #ifndef _ISOFS_FS_H
    2. 

  2. #define _ISOFS_FS_H
    3. 

  3. 

  4. #include <linux/types.h>
    5. 

  5. #include <linux/magic.h>
    6. 

  6. 

  7. /*
    8. 

  8.  * The isofs filesystem constants/structures
    9. 

  9.  */
    10. 

  10. 

  11. /* This part borrowed from the bsd386 isofs */
    12. 

  12. #define ISODCL(from, to) (to - from + 1)
    13. 

  13. 

  14. struct iso_volume_descriptor {
    15. 

  15. 	char type[ISODCL(1,1)]; /* 711 */
    16. 

  16. 	char id[ISODCL(2,6)];
    17. 

  17. 	char version[ISODCL(7,7)];
    18. 

  18. 	char data[ISODCL(8,2048)];
    19. 

  19. };
    20. 

  20. 

  21. /* volume descriptor types */
    22. 

  22. #define ISO_VD_PRIMARY 1
    23. 

  23. #define ISO_VD_SUPPLEMENTARY 2
    24. 

  24. #define ISO_VD_END 255
    25. 

  25. 

  26. #define ISO_STANDARD_ID "CD001"
    27. 

  27. 

  28. struct iso_primary_descriptor {
    29. 

  29. 	char type			[ISODCL (  1,   1)]; /* 711 */
    30. 

  30. 	char id				[ISODCL (  2,   6)];
    31. 

  31. 	char version			[ISODCL (  7,   7)]; /* 711 */
    32. 

  32. 	char unused1			[ISODCL (  8,   8)];
    33. 

  33. 	char system_id			[ISODCL (  9,  40)]; /* achars */
    34. 

  34. 	char volume_id			[ISODCL ( 41,  72)]; /* dchars */
    35. 

  35. 	char unused2			[ISODCL ( 73,  80)];
    36. 

  36. 	char volume_space_size		[ISODCL ( 81,  88)]; /* 733 */
    37. 

  37. 	char unused3			[ISODCL ( 89, 120)];
    38. 

  38. 	char volume_set_size		[ISODCL (121, 124)]; /* 723 */
    39. 

  39. 	char volume_sequence_number	[ISODCL (125, 128)]; /* 723 */
    40. 

  40. 	char logical_block_size		[ISODCL (129, 132)]; /* 723 */
    41. 

  41. 	char path_table_size		[ISODCL (133, 140)]; /* 733 */
    42. 

  42. 	char type_l_path_table		[ISODCL (141, 144)]; /* 731 */
    43. 

  43. 	char opt_type_l_path_table	[ISODCL (145, 148)]; /* 731 */
    44. 

  44. 	char type_m_path_table		[ISODCL (149, 152)]; /* 732 */
    45. 

  45. 	char opt_type_m_path_table	[ISODCL (153, 156)]; /* 732 */
    46. 

  46. 	char root_directory_record	[ISODCL (157, 190)]; /* 9.1 */
    47. 

  47. 	char volume_set_id		[ISODCL (191, 318)]; /* dchars */
    48. 

  48. 	char publisher_id		[ISODCL (319, 446)]; /* achars */
    49. 

  49. 	char preparer_id		[ISODCL (447, 574)]; /* achars */
    50. 

  50. 	char application_id		[ISODCL (575, 702)]; /* achars */
    51. 

  51. 	char copyright_file_id		[ISODCL (703, 739)]; /* 7.5 dchars */
    52. 

  52. 	char abstract_file_id		[ISODCL (740, 776)]; /* 7.5 dchars */
    53. 

  53. 	char bibliographic_file_id	[ISODCL (777, 813)]; /* 7.5 dchars */
    54. 

  54. 	char creation_date		[ISODCL (814, 830)]; /* 8.4.26.1 */
    55. 

  55. 	char modification_date		[ISODCL (831, 847)]; /* 8.4.26.1 */
    56. 

  56. 	char expiration_date		[ISODCL (848, 864)]; /* 8.4.26.1 */
    57. 

  57. 	char effective_date		[ISODCL (865, 881)]; /* 8.4.26.1 */
    58. 

  58. 	char file_structure_version	[ISODCL (882, 882)]; /* 711 */
    59. 

  59. 	char unused4			[ISODCL (883, 883)];
    60. 

  60. 	char application_data		[ISODCL (884, 1395)];
    61. 

  61. 	char unused5			[ISODCL (1396, 2048)];
    62. 

  62. };
    63. 

  63. 

  64. /* Almost the same as the primary descriptor but two fields are specified */
    65. 

  65. struct iso_supplementary_descriptor {
    66. 

  66. 	char type			[ISODCL (  1,   1)]; /* 711 */
    67. 

  67. 	char id				[ISODCL (  2,   6)];
    68. 

  68. 	char version			[ISODCL (  7,   7)]; /* 711 */
    69. 

  69. 	char flags			[ISODCL (  8,   8)]; /* 853 */
    70. 

  70. 	char system_id			[ISODCL (  9,  40)]; /* achars */
    71. 

  71. 	char volume_id			[ISODCL ( 41,  72)]; /* dchars */
    72. 

  72. 	char unused2			[ISODCL ( 73,  80)];
    73. 

  73. 	char volume_space_size		[ISODCL ( 81,  88)]; /* 733 */
    74. 

  74. 	char escape			[ISODCL ( 89, 120)]; /* 856 */
    75. 

  75. 	char volume_set_size		[ISODCL (121, 124)]; /* 723 */
    76. 

  76. 	char volume_sequence_number	[ISODCL (125, 128)]; /* 723 */
    77. 

  77. 	char logical_block_size		[ISODCL (129, 132)]; /* 723 */
    78. 

  78. 	char path_table_size		[ISODCL (133, 140)]; /* 733 */
    79. 

  79. 	char type_l_path_table		[ISODCL (141, 144)]; /* 731 */
    80. 

  80. 	char opt_type_l_path_table	[ISODCL (145, 148)]; /* 731 */
    81. 

  81. 	char type_m_path_table		[ISODCL (149, 152)]; /* 732 */
    82. 

  82. 	char opt_type_m_path_table	[ISODCL (153, 156)]; /* 732 */
    83. 

  83. 	char root_directory_record	[ISODCL (157, 190)]; /* 9.1 */
    84. 

  84. 	char volume_set_id		[ISODCL (191, 318)]; /* dchars */
    85. 

  85. 	char publisher_id		[ISODCL (319, 446)]; /* achars */
    86. 

  86. 	char preparer_id		[ISODCL (447, 574)]; /* achars */
    87. 

  87. 	char application_id		[ISODCL (575, 702)]; /* achars */
    88. 

  88. 	char copyright_file_id		[ISODCL (703, 739)]; /* 7.5 dchars */
    89. 

  89. 	char abstract_file_id		[ISODCL (740, 776)]; /* 7.5 dchars */
    90. 

  90. 	char bibliographic_file_id	[ISODCL (777, 813)]; /* 7.5 dchars */
    91. 

  91. 	char creation_date		[ISODCL (814, 830)]; /* 8.4.26.1 */
    92. 

  92. 	char modification_date		[ISODCL (831, 847)]; /* 8.4.26.1 */
    93. 

  93. 	char expiration_date		[ISODCL (848, 864)]; /* 8.4.26.1 */
    94. 

  94. 	char effective_date		[ISODCL (865, 881)]; /* 8.4.26.1 */
    95. 

  95. 	char file_structure_version	[ISODCL (882, 882)]; /* 711 */
    96. 

  96. 	char unused4			[ISODCL (883, 883)];
    97. 

  97. 	char application_data		[ISODCL (884, 1395)];
    98. 

  98. 	char unused5			[ISODCL (1396, 2048)];
    99. 

  99. };
    100. 

  100. 

  101. 

  102. #define HS_STANDARD_ID "CDROM"
    103. 

  103. 

  104. struct  hs_volume_descriptor {
    105. 

  105. 	char foo			[ISODCL (  1,   8)]; /* 733 */
    106. 

  106. 	char type			[ISODCL (  9,   9)]; /* 711 */
    107. 

  107. 	char id				[ISODCL ( 10,  14)];
    108. 

  108. 	char version			[ISODCL ( 15,  15)]; /* 711 */
    109. 

  109. 	char data[ISODCL(16,2048)];
    110. 

  110. };
    111. 

  111. 

  112. 

  113. struct hs_primary_descriptor {
    114. 

  114. 	char foo			[ISODCL (  1,   8)]; /* 733 */
    115. 

  115. 	char type			[ISODCL (  9,   9)]; /* 711 */
    116. 

  116. 	char id				[ISODCL ( 10,  14)];
    117. 

  117. 	char version			[ISODCL ( 15,  15)]; /* 711 */
    118. 

  118. 	char unused1			[ISODCL ( 16,  16)]; /* 711 */
    119. 

  119. 	char system_id			[ISODCL ( 17,  48)]; /* achars */
    120. 

  120. 	char volume_id			[ISODCL ( 49,  80)]; /* dchars */
    121. 

  121. 	char unused2			[ISODCL ( 81,  88)]; /* 733 */
    122. 

  122. 	char volume_space_size		[ISODCL ( 89,  96)]; /* 733 */
    123. 

  123. 	char unused3			[ISODCL ( 97, 128)]; /* 733 */
    124. 

  124. 	char volume_set_size		[ISODCL (129, 132)]; /* 723 */
    125. 

  125. 	char volume_sequence_number	[ISODCL (133, 136)]; /* 723 */
    126. 

  126. 	char logical_block_size		[ISODCL (137, 140)]; /* 723 */
    127. 

  127. 	char path_table_size		[ISODCL (141, 148)]; /* 733 */
    128. 

  128. 	char type_l_path_table		[ISODCL (149, 152)]; /* 731 */
    129. 

  129. 	char unused4			[ISODCL (153, 180)]; /* 733 */
    130. 

  130. 	char root_directory_record	[ISODCL (181, 214)]; /* 9.1 */
    131. 

  131. };
    132. 

  132. 

  133. /* We use this to help us look up the parent inode numbers. */
    134. 

  134. 

  135. struct iso_path_table{
    136. 

  136. 	unsigned char  name_len[2];	/* 721 */
    137. 

  137. 	char extent[4];		/* 731 */
    138. 

  138. 	char  parent[2];	/* 721 */
    139. 

  139. 	char name[0];
    140. 

  140. } __attribute__((packed));
    141. 

  141. 

  142. /* high sierra is identical to iso, except that the date is only 6 bytes, and
    143. 

  143.    there is an extra reserved byte after the flags */
    144. 

  144. 

  145. struct iso_directory_record {
    146. 

  146. 	char length			[ISODCL (1, 1)]; /* 711 */
    147. 

  147. 	char ext_attr_length		[ISODCL (2, 2)]; /* 711 */
    148. 

  148. 	char extent			[ISODCL (3, 10)]; /* 733 */
    149. 

  149. 	char size			[ISODCL (11, 18)]; /* 733 */
    150. 

  150. 	char date			[ISODCL (19, 25)]; /* 7 by 711 */
    151. 

  151. 	char flags			[ISODCL (26, 26)];
    152. 

  152. 	char file_unit_size		[ISODCL (27, 27)]; /* 711 */
    153. 

  153. 	char interleave			[ISODCL (28, 28)]; /* 711 */
    154. 

  154. 	char volume_sequence_number	[ISODCL (29, 32)]; /* 723 */
    155. 

  155. 	unsigned char name_len		[ISODCL (33, 33)]; /* 711 */
    156. 

  156. 	char name			[0];
    157. 

  157. } __attribute__((packed));
    158. 

  158. 

  159. #define ISOFS_BLOCK_BITS 11
    160. 

  160. #define ISOFS_BLOCK_SIZE 2048
    161. 

  161. 

  162. #define ISOFS_BUFFER_SIZE(INODE) ((INODE)->i_sb->s_blocksize)
    163. 

  163. #define ISOFS_BUFFER_BITS(INODE) ((INODE)->i_sb->s_blocksize_bits)
    164. 

  164. 

  165. #endif /* _ISOFS_FS_H */
    166.