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-
- #ifndef _ISOFS_FS_H
- #define _ISOFS_FS_H
-
- #include <linux/types.h>
- /*
- * The isofs filesystem constants/structures
- */
-
- /* This part borrowed from the bsd386 isofs */
- #define ISODCL(from, to) (to - from + 1)
-
- struct iso_volume_descriptor {
- char type[ISODCL(1,1)]; /* 711 */
- char id[ISODCL(2,6)];
- char version[ISODCL(7,7)];
- char data[ISODCL(8,2048)];
- };
-
- /* volume descriptor types */
- #define ISO_VD_PRIMARY 1
- #define ISO_VD_SUPPLEMENTARY 2
- #define ISO_VD_END 255
-
- #define ISO_STANDARD_ID "CD001"
-
- struct iso_primary_descriptor {
- char type [ISODCL ( 1, 1)]; /* 711 */
- char id [ISODCL ( 2, 6)];
- char version [ISODCL ( 7, 7)]; /* 711 */
- char unused1 [ISODCL ( 8, 8)];
- char system_id [ISODCL ( 9, 40)]; /* achars */
- char volume_id [ISODCL ( 41, 72)]; /* dchars */
- char unused2 [ISODCL ( 73, 80)];
- char volume_space_size [ISODCL ( 81, 88)]; /* 733 */
- char unused3 [ISODCL ( 89, 120)];
- char volume_set_size [ISODCL (121, 124)]; /* 723 */
- char volume_sequence_number [ISODCL (125, 128)]; /* 723 */
- char logical_block_size [ISODCL (129, 132)]; /* 723 */
- char path_table_size [ISODCL (133, 140)]; /* 733 */
- char type_l_path_table [ISODCL (141, 144)]; /* 731 */
- char opt_type_l_path_table [ISODCL (145, 148)]; /* 731 */
- char type_m_path_table [ISODCL (149, 152)]; /* 732 */
- char opt_type_m_path_table [ISODCL (153, 156)]; /* 732 */
- char root_directory_record [ISODCL (157, 190)]; /* 9.1 */
- char volume_set_id [ISODCL (191, 318)]; /* dchars */
- char publisher_id [ISODCL (319, 446)]; /* achars */
- char preparer_id [ISODCL (447, 574)]; /* achars */
- char application_id [ISODCL (575, 702)]; /* achars */
- char copyright_file_id [ISODCL (703, 739)]; /* 7.5 dchars */
- char abstract_file_id [ISODCL (740, 776)]; /* 7.5 dchars */
- char bibliographic_file_id [ISODCL (777, 813)]; /* 7.5 dchars */
- char creation_date [ISODCL (814, 830)]; /* 8.4.26.1 */
- char modification_date [ISODCL (831, 847)]; /* 8.4.26.1 */
- char expiration_date [ISODCL (848, 864)]; /* 8.4.26.1 */
- char effective_date [ISODCL (865, 881)]; /* 8.4.26.1 */
- char file_structure_version [ISODCL (882, 882)]; /* 711 */
- char unused4 [ISODCL (883, 883)];
- char application_data [ISODCL (884, 1395)];
- char unused5 [ISODCL (1396, 2048)];
- };
-
- /* Almost the same as the primary descriptor but two fields are specified */
- struct iso_supplementary_descriptor {
- char type [ISODCL ( 1, 1)]; /* 711 */
- char id [ISODCL ( 2, 6)];
- char version [ISODCL ( 7, 7)]; /* 711 */
- char flags [ISODCL ( 8, 8)]; /* 853 */
- char system_id [ISODCL ( 9, 40)]; /* achars */
- char volume_id [ISODCL ( 41, 72)]; /* dchars */
- char unused2 [ISODCL ( 73, 80)];
- char volume_space_size [ISODCL ( 81, 88)]; /* 733 */
- char escape [ISODCL ( 89, 120)]; /* 856 */
- char volume_set_size [ISODCL (121, 124)]; /* 723 */
- char volume_sequence_number [ISODCL (125, 128)]; /* 723 */
- char logical_block_size [ISODCL (129, 132)]; /* 723 */
- char path_table_size [ISODCL (133, 140)]; /* 733 */
- char type_l_path_table [ISODCL (141, 144)]; /* 731 */
- char opt_type_l_path_table [ISODCL (145, 148)]; /* 731 */
- char type_m_path_table [ISODCL (149, 152)]; /* 732 */
- char opt_type_m_path_table [ISODCL (153, 156)]; /* 732 */
- char root_directory_record [ISODCL (157, 190)]; /* 9.1 */
- char volume_set_id [ISODCL (191, 318)]; /* dchars */
- char publisher_id [ISODCL (319, 446)]; /* achars */
- char preparer_id [ISODCL (447, 574)]; /* achars */
- char application_id [ISODCL (575, 702)]; /* achars */
- char copyright_file_id [ISODCL (703, 739)]; /* 7.5 dchars */
- char abstract_file_id [ISODCL (740, 776)]; /* 7.5 dchars */
- char bibliographic_file_id [ISODCL (777, 813)]; /* 7.5 dchars */
- char creation_date [ISODCL (814, 830)]; /* 8.4.26.1 */
- char modification_date [ISODCL (831, 847)]; /* 8.4.26.1 */
- char expiration_date [ISODCL (848, 864)]; /* 8.4.26.1 */
- char effective_date [ISODCL (865, 881)]; /* 8.4.26.1 */
- char file_structure_version [ISODCL (882, 882)]; /* 711 */
- char unused4 [ISODCL (883, 883)];
- char application_data [ISODCL (884, 1395)];
- char unused5 [ISODCL (1396, 2048)];
- };
-
-
- #define HS_STANDARD_ID "CDROM"
-
- struct hs_volume_descriptor {
- char foo [ISODCL ( 1, 8)]; /* 733 */
- char type [ISODCL ( 9, 9)]; /* 711 */
- char id [ISODCL ( 10, 14)];
- char version [ISODCL ( 15, 15)]; /* 711 */
- char data[ISODCL(16,2048)];
- };
-
-
- struct hs_primary_descriptor {
- char foo [ISODCL ( 1, 8)]; /* 733 */
- char type [ISODCL ( 9, 9)]; /* 711 */
- char id [ISODCL ( 10, 14)];
- char version [ISODCL ( 15, 15)]; /* 711 */
- char unused1 [ISODCL ( 16, 16)]; /* 711 */
- char system_id [ISODCL ( 17, 48)]; /* achars */
- char volume_id [ISODCL ( 49, 80)]; /* dchars */
- char unused2 [ISODCL ( 81, 88)]; /* 733 */
- char volume_space_size [ISODCL ( 89, 96)]; /* 733 */
- char unused3 [ISODCL ( 97, 128)]; /* 733 */
- char volume_set_size [ISODCL (129, 132)]; /* 723 */
- char volume_sequence_number [ISODCL (133, 136)]; /* 723 */
- char logical_block_size [ISODCL (137, 140)]; /* 723 */
- char path_table_size [ISODCL (141, 148)]; /* 733 */
- char type_l_path_table [ISODCL (149, 152)]; /* 731 */
- char unused4 [ISODCL (153, 180)]; /* 733 */
- char root_directory_record [ISODCL (181, 214)]; /* 9.1 */
- };
-
- /* We use this to help us look up the parent inode numbers. */
-
- struct iso_path_table{
- unsigned char name_len[2]; /* 721 */
- char extent[4]; /* 731 */
- char parent[2]; /* 721 */
- char name[0];
- } __attribute__((packed));
-
- /* high sierra is identical to iso, except that the date is only 6 bytes, and
- there is an extra reserved byte after the flags */
-
- struct iso_directory_record {
- char length [ISODCL (1, 1)]; /* 711 */
- char ext_attr_length [ISODCL (2, 2)]; /* 711 */
- char extent [ISODCL (3, 10)]; /* 733 */
- char size [ISODCL (11, 18)]; /* 733 */
- char date [ISODCL (19, 25)]; /* 7 by 711 */
- char flags [ISODCL (26, 26)];
- char file_unit_size [ISODCL (27, 27)]; /* 711 */
- char interleave [ISODCL (28, 28)]; /* 711 */
- char volume_sequence_number [ISODCL (29, 32)]; /* 723 */
- unsigned char name_len [ISODCL (33, 33)]; /* 711 */
- char name [0];
- } __attribute__((packed));
-
- #define ISOFS_BLOCK_BITS 11
- #define ISOFS_BLOCK_SIZE 2048
-
- #define ISOFS_BUFFER_SIZE(INODE) ((INODE)->i_sb->s_blocksize)
- #define ISOFS_BUFFER_BITS(INODE) ((INODE)->i_sb->s_blocksize_bits)
-
- #define ISOFS_SUPER_MAGIC 0x9660
-
- #ifdef __KERNEL__
- /* Number conversion inlines, named after the section in ISO 9660
- they correspond to. */
-
- #include <asm/byteorder.h>
- #include <asm/unaligned.h>
- #include <linux/iso_fs_i.h>
- #include <linux/iso_fs_sb.h>
-
- static inline struct isofs_sb_info *ISOFS_SB(struct super_block *sb)
- {
- return sb->s_fs_info;
- }
-
- static inline struct iso_inode_info *ISOFS_I(struct inode *inode)
- {
- return container_of(inode, struct iso_inode_info, vfs_inode);
- }
-
- static inline int isonum_711(char *p)
- {
- return *(u8 *)p;
- }
- static inline int isonum_712(char *p)
- {
- return *(s8 *)p;
- }
- static inline unsigned int isonum_721(char *p)
- {
- return le16_to_cpu(get_unaligned((__le16 *)p));
- }
- static inline unsigned int isonum_722(char *p)
- {
- return be16_to_cpu(get_unaligned((__le16 *)p));
- }
- static inline unsigned int isonum_723(char *p)
- {
- /* Ignore bigendian datum due to broken mastering programs */
- return le16_to_cpu(get_unaligned((__le16 *)p));
- }
- static inline unsigned int isonum_731(char *p)
- {
- return le32_to_cpu(get_unaligned((__le32 *)p));
- }
- static inline unsigned int isonum_732(char *p)
- {
- return be32_to_cpu(get_unaligned((__le32 *)p));
- }
- static inline unsigned int isonum_733(char *p)
- {
- /* Ignore bigendian datum due to broken mastering programs */
- return le32_to_cpu(get_unaligned((__le32 *)p));
- }
- extern int iso_date(char *, int);
-
- struct inode; /* To make gcc happy */
-
- extern int parse_rock_ridge_inode(struct iso_directory_record *, struct inode *);
- extern int get_rock_ridge_filename(struct iso_directory_record *, char *, struct inode *);
- extern int isofs_name_translate(struct iso_directory_record *, char *, struct inode *);
-
- int get_joliet_filename(struct iso_directory_record *, unsigned char *, struct inode *);
- int get_acorn_filename(struct iso_directory_record *, char *, struct inode *);
-
- extern struct dentry *isofs_lookup(struct inode *, struct dentry *, struct nameidata *);
- extern struct buffer_head *isofs_bread(struct inode *, sector_t);
- extern int isofs_get_blocks(struct inode *, sector_t, struct buffer_head **, unsigned long);
-
- extern struct inode *isofs_iget(struct super_block *sb,
- unsigned long block,
- unsigned long offset);
-
- /* Because the inode number is no longer relevant to finding the
- * underlying meta-data for an inode, we are free to choose a more
- * convenient 32-bit number as the inode number. The inode numbering
- * scheme was recommended by Sergey Vlasov and Eric Lammerts. */
- static inline unsigned long isofs_get_ino(unsigned long block,
- unsigned long offset,
- unsigned long bufbits)
- {
- return (block << (bufbits - 5)) | (offset >> 5);
- }
-
- /* Every directory can have many redundant directory entries scattered
- * throughout the directory tree. First there is the directory entry
- * with the name of the directory stored in the parent directory.
- * Then, there is the "." directory entry stored in the directory
- * itself. Finally, there are possibly many ".." directory entries
- * stored in all the subdirectories.
- *
- * In order for the NFS get_parent() method to work and for the
- * general consistency of the dcache, we need to make sure the
- * "i_iget5_block" and "i_iget5_offset" all point to exactly one of
- * the many redundant entries for each directory. We normalize the
- * block and offset by always making them point to the "." directory.
- *
- * Notice that we do not use the entry for the directory with the name
- * that is located in the parent directory. Even though choosing this
- * first directory is more natural, it is much easier to find the "."
- * entry in the NFS get_parent() method because it is implicitly
- * encoded in the "extent + ext_attr_length" fields of _all_ the
- * redundant entries for the directory. Thus, it can always be
- * reached regardless of which directory entry you have in hand.
- *
- * This works because the "." entry is simply the first directory
- * record when you start reading the file that holds all the directory
- * records, and this file starts at "extent + ext_attr_length" blocks.
- * Because the "." entry is always the first entry listed in the
- * directories file, the normalized "offset" value is always 0.
- *
- * You should pass the directory entry in "de". On return, "block"
- * and "offset" will hold normalized values. Only directories are
- * affected making it safe to call even for non-directory file
- * types. */
- static inline void
- isofs_normalize_block_and_offset(struct iso_directory_record* de,
- unsigned long *block,
- unsigned long *offset)
- {
- /* Only directories are normalized. */
- if (de->flags[0] & 2) {
- *offset = 0;
- *block = (unsigned long)isonum_733(de->extent)
- + (unsigned long)isonum_711(de->ext_attr_length);
- }
- }
-
- extern struct inode_operations isofs_dir_inode_operations;
- extern struct file_operations isofs_dir_operations;
- extern struct address_space_operations isofs_symlink_aops;
- extern struct export_operations isofs_export_ops;
-
- /* The following macros are used to check for memory leaks. */
- #ifdef LEAK_CHECK
- #define free_s leak_check_free_s
- #define malloc leak_check_malloc
- #define sb_bread leak_check_bread
- #define brelse leak_check_brelse
- extern void * leak_check_malloc(unsigned int size);
- extern void leak_check_free_s(void * obj, int size);
- extern struct buffer_head * leak_check_bread(struct super_block *sb, int block);
- extern void leak_check_brelse(struct buffer_head * bh);
- #endif /* LEAK_CHECK */
-
- #endif /* __KERNEL__ */
-
- #endif
-