From 3a96085b999220c4da0c5ef7d1f7ba26b9ddfb98 Mon Sep 17 00:00:00 2001 From: Waldemar Brodkorb Date: Sun, 31 Dec 2017 18:47:16 +0100 Subject: dec-multia: make netboot possible, add aboot bootloader --- package/aboot/src/include/iso.h | 292 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 292 insertions(+) create mode 100644 package/aboot/src/include/iso.h (limited to 'package/aboot/src/include/iso.h') diff --git a/package/aboot/src/include/iso.h b/package/aboot/src/include/iso.h new file mode 100644 index 000000000..507bce2ee --- /dev/null +++ b/package/aboot/src/include/iso.h @@ -0,0 +1,292 @@ +#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_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)]; +}; + + +#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]; +}; + +/* 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]; +}; + +#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) + +#if 0 +#ifdef ISOFS_FIXED_BLOCKSIZE +/* We use these until the buffer cache supports 2048 */ +#define ISOFS_BUFFER_BITS 10 +#define ISOFS_BUFFER_SIZE 1024 + +#define ISOFS_BLOCK_NUMBER(X) (X<<1) +#else +#define ISOFS_BUFFER_BITS 11 +#define ISOFS_BUFFER_SIZE 2048 + +#define ISOFS_BLOCK_NUMBER(X) (X) +#endif +#endif + +#define ISOFS_SUPER_MAGIC 0x9660 +#define ISOFS_FILE_UNKNOWN 0 +#define ISOFS_FILE_TEXT 1 +#define ISOFS_FILE_BINARY 2 +#define ISOFS_FILE_TEXT_M 3 + +struct isofs_super_block { + unsigned long s_ninodes; + unsigned long s_nzones; + unsigned long s_firstdatazone; + unsigned long s_log_zone_size; + unsigned long s_max_size; + + unsigned char s_high_sierra; /* A simple flag */ + unsigned char s_mapping; + unsigned char s_conversion; + unsigned char s_rock; + unsigned char s_cruft; /* Broken disks with high + byte of length containing + junk */ + unsigned int s_blocksize; + unsigned int s_blocksize_bits; + unsigned int s_mounted; + unsigned char s_unhide; + unsigned char s_nosuid; + unsigned char s_nodev; + mode_t s_mode; +}; + +/* + * iso fs inode data in memory + */ +struct iso_inode { + unsigned int i_first_extent; + unsigned int i_backlink; + unsigned char i_file_format; +}; + +/* From fs/isofs/rock.h in Linux, (c) 1995, 1996 Eric Youngdale */ + +/* These structs are used by the system-use-sharing protocol, in which the + Rock Ridge extensions are embedded. It is quite possible that other + extensions are present on the disk, and this is fine as long as they + all use SUSP */ + +struct SU_SP{ + unsigned char magic[2]; + unsigned char skip; +}; + +struct SU_CE{ + char extent[8]; + char offset[8]; + char size[8]; +}; + +struct SU_ER{ + unsigned char len_id; + unsigned char len_des; + unsigned char len_src; + unsigned char ext_ver; + char data[0]; +}; + +struct RR_RR{ + char flags[1]; +}; + +struct RR_PX{ + char mode[8]; + char n_links[8]; + char uid[8]; + char gid[8]; +}; + +struct RR_PN{ + char dev_high[8]; + char dev_low[8]; +}; + + +struct SL_component{ + unsigned char flags; + unsigned char len; + char text[0]; +}; + +struct RR_SL{ + unsigned char flags; + struct SL_component link; +}; + +struct RR_NM{ + unsigned char flags; + char name[0]; +}; + +struct RR_CL{ + char location[8]; +}; + +struct RR_PL{ + char location[8]; +}; + +struct stamp{ + char time[7]; +}; + +struct RR_TF{ + char flags; + struct stamp times[0]; /* Variable number of these beasts */ +}; + +/* These are the bits and their meanings for flags in the TF structure. */ +#define TF_CREATE 1 +#define TF_MODIFY 2 +#define TF_ACCESS 4 +#define TF_ATTRIBUTES 8 +#define TF_BACKUP 16 +#define TF_EXPIRATION 32 +#define TF_EFFECTIVE 64 +#define TF_LONG_FORM 128 + +struct rock_ridge{ + char signature[2]; + unsigned char len; + unsigned char version; + union{ + struct SU_SP SP; + struct SU_CE CE; + struct SU_ER ER; + struct RR_RR RR; + struct RR_PX PX; + struct RR_PN PN; + struct RR_SL SL; + struct RR_NM NM; + struct RR_CL CL; + struct RR_PL PL; + struct RR_TF TF; + } u; +}; + +#define RR_PX 1 /* POSIX attributes */ +#define RR_PN 2 /* POSIX devices */ +#define RR_SL 4 /* Symbolic link */ +#define RR_NM 8 /* Alternate Name */ +#define RR_CL 16 /* Child link */ +#define RR_PL 32 /* Parent link */ +#define RR_RE 64 /* Relocation directory */ +#define RR_TF 128 /* Timestamps */ + +#endif -- cgit v1.2.3