-/**
- * @file iso9660.h
- * @author Lunaixsky (zelong56@gmail.com)
- * @brief ISO9660 File system header file. (Reference: ECMA-119, 4th ed.)
- * @version 0.1
- * @date 2022-10-03
- *
- * @copyright Copyright (c) 2022
- *
- */
-
-#ifndef __LUNAIX_ISO9660_H
-#define __LUNAIX_ISO9660_H
-
-#include <lunaix/clock.h>
-#include <lunaix/device.h>
-#include <lunaix/fs.h>
-#include <lunaix/types.h>
-
-#define ISO_SIGNATURE_LO 0x30304443UL
-#define ISO_SIGNATURE_HI 0x31
-
-// Volume Types
-#define ISO_VOLBOOT 0 // Boot Record
-#define ISO_VOLPRIM 1 // Primary
-#define ISO_VOLSUPP 2 // Supplementary
-#define ISO_VOLPART 3 // Partition
-#define ISO_VOLTERM 255 // Volume descriptor set terminator
-
-#define ISO_FHIDDEN 0x1 // a hidden file
-#define ISO_FDIR 0x2 // a directory file
-#define ISO_FASSOC 0x4 // a associated file
-#define ISO_FRECORD 0x8 // file store in iso record fashion
-#define ISO_FPROTECT 0x10 // file being protected by access control
-#define ISO_FEXTENTS 0x80 // the extent by this record is a file partial
-
-#define ISO9660_BLKSZ 2048
-#define ISO9660_IDLEN 256
-#define ISO9660_READ_OFF (ISO9660_BLKSZ * 16)
-
-// NOTES:
-// Each Descriptor sized 1 logical block (2048 bytes in common cases)
-// ISO9660 store number in both-byte order. That is, for a d-bits number, it
-// will result in 2d bits of storage. The lower d-bits are little-endian and
-// upper d-bits are big-endian.
-
-struct iso_vol
-{
- u8_t type;
- u8_t std_id[5]; // CD001
- u8_t version;
-} compact;
-
-struct iso_vol_boot
-{
- struct iso_vol header;
- u8_t sys_id[32];
- u8_t boot_id[32];
- u8_t reserved; // align to data line width
-} compact;
-
-struct iso_datetime
-{
- u8_t year[4];
- u8_t month[2];
- u8_t day[2];
- u8_t hour[2];
- u8_t min[2];
- u8_t sec[2];
- u8_t ms[2];
- u8_t gmt;
-} compact;
-
-// 32bits both-byte-order integer
-typedef struct iso_bbo32
-{
- u32_t le; // little-endian
- u32_t be; // big-endian
-} compact iso_bbo32_t;
-
-// 16bits both-byte-order integer
-typedef struct iso_bbo16
-{
- u16_t le; // little-endian
- u16_t be; // big-endian
-} compact iso_bbo16_t;
-
-// (8.4) Describe a primary volume space
-struct iso_vol_primary
-{
- struct iso_vol header;
- u8_t reserved_1;
- u8_t sys_id[32];
- u8_t vol_id[32];
- u8_t reserved_2[8];
- iso_bbo32_t vol_size;
- u8_t reserved_3[32];
- iso_bbo16_t set_size;
- iso_bbo16_t seq_num;
- iso_bbo16_t lb_size;
- iso_bbo32_t ptable_size;
- u32_t lpath_tbl_ptr; // Type L Path table location (LBA)
- u32_t reserved_4[3]; // use type M if big endian machine.
- u8_t root_record[34];
- u8_t set_id[128];
- u8_t publisher_id[128];
- u8_t preparer_id[128];
- u8_t app_id[128];
- u8_t copyright_id[128];
- u8_t asbtract_id[128];
- u8_t bib_id[128];
- struct iso_datetime ctime; // creation
- struct iso_datetime mtime; // modification
- struct iso_datetime ex_time; // expiration
- struct iso_datetime ef_time; // effective
- u8_t fstruct_ver; // file structure version, don't care!
-} compact; // size 1124
-
-// Layout for Supplementary Vol. is almost identical to primary vol.
-// We ignore it for now. (see section 8.5, table 6)
-
-// (8.6) Describe a volume partition within a volume space
-struct iso_partition
-{
- struct iso_vol header;
- u8_t reserved;
- u8_t sys_id[32];
- u8_t part_id[32];
- iso_bbo32_t part_addr;
- iso_bbo32_t part_size;
-} compact;
-
-// (6.10.4) MDU with variable record
-struct iso_var_mdu
-{
- u8_t len;
- u8_t content[0];
-} compact;
-
-struct iso_datetime2
-{
- u8_t year;
- u8_t month;
- u8_t day;
- u8_t hour;
- u8_t min;
- u8_t sec;
- u8_t gmt;
-} compact;
-
-// (9.1) Directory Record [Embedded into Variable MDU]
-struct iso_drecord
-{
- u8_t xattr_len;
- iso_bbo32_t extent_addr;
- iso_bbo32_t data_size;
- struct iso_datetime2 mktime; // Time the record is made, see 9.1.5
- u8_t flags;
- u8_t fu_sz; // size of file unit (FU)
- u8_t gap_sz; // size of gap if FU is interleaved.
- iso_bbo16_t vol_seq;
- struct iso_var_mdu name;
-} compact;
-
-struct iso_xattr
-{
- iso_bbo16_t owner;
- iso_bbo16_t group;
- u16_t perm;
- struct iso_datetime ctime;
- struct iso_datetime mtime;
- struct iso_datetime ex_time;
- struct iso_datetime ef_time;
- u8_t record_fmt;
- u8_t record_attr;
- iso_bbo16_t record_len;
- u32_t sys_id;
- u8_t reserved1[64];
- u8_t version;
- u8_t len_esc;
- u8_t reserved2[64];
- iso_bbo16_t payload_sz;
- u8_t payload[0];
- // There is also a escape sequence after payload,
- // It however marked as optional, hence we ignore it.
-} compact;
-
-///
-/// -------- IEEE P1281 SUSP ---------
-///
-
-#define ISOSU_ER 0x5245
-#define ISOSU_ST 0x5453
-
-struct isosu_base
-{
- u16_t signature;
- u8_t length;
- u8_t version;
-} compact;
-
-struct isosu_er
-{
- struct isosu_base header;
- u8_t id_len;
- u8_t des_len;
- u8_t src_len;
- u8_t ext_ver;
- u8_t id_des_src[0];
-} compact;
-
-///
-/// -------- Rock Ridge Extension --------
-///
-
-#define ISORR_PX 0x5850
-#define ISORR_PN 0x4e50
-#define ISORR_SL 0x4c53
-#define ISORR_NM 0x4d4e
-#define ISORR_TF 0x4654
-
-#define ISORR_NM_CONT 0x1
-
-#define ISORR_TF_CTIME 0x1
-#define ISORR_TF_MTIME 0x2
-#define ISORR_TF_ATIME 0x4
-#define ISORR_TF_LONG_FORM 0x80
-
-struct isorr_px
-{
- struct isosu_base header;
- iso_bbo32_t mode;
- iso_bbo32_t link;
- iso_bbo32_t uid;
- iso_bbo32_t gid;
- iso_bbo32_t sn;
-} compact;
-
-struct isorr_pn
-{
- struct isosu_base header;
- iso_bbo32_t dev_hi;
- iso_bbo32_t dev_lo;
-} compact;
-
-struct isorr_sl
-{
- struct isosu_base header;
- u8_t flags;
- char symlink[0];
-} compact;
-
-struct isorr_nm
-{
- struct isosu_base header;
- u8_t flags;
- char name[0];
-} compact;
-
-struct isorr_tf
-{
- struct isosu_base header;
- u8_t flags;
- char times[0];
-} compact;
-
-///
-/// -------- VFS integration ---------
-///
-
-struct iso_inode
-{
- u32_t record_fmt;
- u32_t fu_size;
- u32_t gap_size;
- struct llist_header drecaches;
-};
-
-struct iso_drecache
-{
- struct llist_header caches;
- u32_t extent_addr;
- u32_t data_size;
- u32_t xattr_len;
- u32_t fno;
- u32_t fu_size;
- u32_t gap_size;
- u32_t flags;
- time_t ctime;
- time_t atime;
- time_t mtime;
- struct hstr name;
- char name_val[ISO9660_IDLEN];
-};
-
-struct iso_superblock
-{
- u32_t volume_size;
- u32_t lb_size;
-};
-
-struct iso_drecord*
-iso9660_get_drecord(struct iso_var_mdu* drecord_mdu);
-
-int
-iso9660_fill_inode(struct v_inode* inode, struct iso_drecache* dir, int ino);
-
-time_t
-iso9660_dt2unix(struct iso_datetime* isodt);
-
-time_t
-iso9660_dt22unix(struct iso_datetime2* isodt2);
-
-void
-iso9660_init();
-
-int
-iso9660_setup_dnode(struct v_dnode* dnode, struct v_inode* inode);
-
-void
-iso9660_fill_drecache(struct iso_drecache* cache,
- struct iso_drecord* drec,
- u32_t len);
-
-int
-iso9660_dir_lookup(struct v_inode* this, struct v_dnode* dnode);
-
-int
-iso9660_readdir(struct v_file* file, struct dir_context* dctx);
-
-int
-iso9660_open(struct v_inode* this, struct v_file* file);
-
-int
-iso9660_close(struct v_file* file);
-
-int
-iso9660_read(struct v_inode* inode, void* buffer, size_t len, size_t fpos);
-
-int
-iso9660_write(struct v_inode* inode, void* buffer, size_t len, size_t fpos);
-
-int
-iso9660_read_page(struct v_inode* inode, void* buffer, size_t fpos);
-
-int
-iso9660_write_page(struct v_inode* inode, void* buffer, size_t fpos);
-
-int
-iso9660_seek(struct v_inode* inode, size_t offset);
-
-int
-isorr_parse_px(struct iso_drecache* cache, void* px_start);
-
-int
-isorr_parse_nm(struct iso_drecache* cache, void* nm_start);
-
-int
-isorr_parse_tf(struct iso_drecache* cache, void* tf_start);
-
-#endif /* __LUNAIX_ISO9660_H */
git://scm.lunaixsky.com / lunaix-os.git / blobdiff