--- /dev/null
+/**
+ * @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_file* file, 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