1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
312 lines
12 KiB
C
312 lines
12 KiB
C
|
|
#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
|