#ifndef _ISOFS_FS_H #define _ISOFS_FS_H #include /* * 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 #include #include #include 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