GRUB2/grub-2.04/include/grub/ventoy.h

   1 /******************************************************************************
   2  * ventoy.h
   3  *
   4  * Copyright (c) 2020, longpanda <admin@ventoy.net>
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License as
   8  * published by the Free Software Foundation; either version 3 of the
   9  * License, or (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  18  *
  19  */
  20
  21 #ifndef __VENTOY_H__
  22 #define __VENTOY_H__
  23
  24 #define COMPILE_ASSERT(expr)  extern char __compile_assert[(expr) ? 1 : -1]
  25
  26 #define VENTOY_COMPATIBLE_STR      "VENTOY COMPATIBLE"
  27 #define VENTOY_COMPATIBLE_STR_LEN  17
  28
  29 #define VENTOY_GUID { 0x77772020, 0x2e77, 0x6576, { 0x6e, 0x74, 0x6f, 0x79, 0x2e, 0x6e, 0x65, 0x74 }}
  30
  31 #pragma pack(1)
  32
  33 typedef struct ventoy_guid
  34 {
  35     grub_uint32_t   data1;
  36     grub_uint16_t   data2;
  37     grub_uint16_t   data3;
  38     grub_uint8_t    data4[8];
  39 }ventoy_guid;
  40
  41
  42 typedef struct ventoy_image_disk_region
  43 {
  44     grub_uint32_t   image_sector_count; /* image sectors contained in this region (in 2048) */
  45     grub_uint32_t   image_start_sector; /* image sector start (in 2048) */
  46     grub_uint64_t   disk_start_sector;  /* disk sector start (in 512) */
  47 }ventoy_image_disk_region;
  48
  49 typedef struct ventoy_image_location
  50 {
  51     ventoy_guid  guid;
  52
  53     /* image sector size, currently this value is always 2048 */
  54     grub_uint32_t   image_sector_size;
  55
  56     /* disk sector size, normally the value is 512 */
  57     grub_uint32_t   disk_sector_size;
  58
  59     grub_uint32_t   region_count;
  60
  61     /*
  62      * disk region data (region_count)
  63      * If the image file has more than one fragments in disk,
  64      * there will be more than one region data here.
  65      *
  66      */
  67     ventoy_image_disk_region regions[1];
  68
  69     /* ventoy_image_disk_region regions[2~region_count-1] */
  70 }ventoy_image_location;
  71
  72
  73 typedef struct ventoy_os_param
  74 {
  75     ventoy_guid    guid;                  // VENTOY_GUID
  76     grub_uint8_t   chksum;                // checksum
  77
  78     grub_uint8_t   vtoy_disk_guid[16];
  79     grub_uint64_t  vtoy_disk_size;       // disk size in bytes
  80     grub_uint16_t  vtoy_disk_part_id;    // begin with 1
  81     grub_uint16_t  vtoy_disk_part_type;  // 0:exfat   1:ntfs  other: reserved
  82     char           vtoy_img_path[384];   // It seems to be enough, utf-8 format
  83     grub_uint64_t  vtoy_img_size;        // image file size in bytes
  84
  85     /*
  86      * Ventoy will write a copy of ventoy_image_location data into runtime memory
  87      * this is the physically address and length of that memory.
  88      * Address 0 means no such data exist.
  89      * Address will be aligned by 4KB.
  90      *
  91      */
  92     grub_uint64_t  vtoy_img_location_addr;
  93     grub_uint32_t  vtoy_img_location_len;
  94
  95     /*
  96      * These 32 bytes are reserved by ventoy.
  97      *
  98      * vtoy_reserved[0]: vtoy_break_level
  99      * vtoy_reserved[1]: vtoy_debug_level
 100      *
 101      */
 102     grub_uint8_t   vtoy_reserved[32];    // Internal use by ventoy
 103
 104     grub_uint8_t   reserved[31];
 105 }ventoy_os_param;
 106
 107 #pragma pack()
 108
 109 // compile assert check : sizeof(ventoy_os_param) must be 512
 110 COMPILE_ASSERT(sizeof(ventoy_os_param) == 512);
 111
 112
 113
 114
 115
 116
 117
 118 #pragma pack(4)
 119
 120 typedef struct ventoy_chain_head
 121 {
 122     ventoy_os_param os_param;
 123
 124     grub_uint32_t disk_drive;
 125     grub_uint32_t drive_map;
 126     grub_uint32_t disk_sector_size;
 127
 128     grub_uint64_t real_img_size_in_bytes;
 129     grub_uint64_t virt_img_size_in_bytes;
 130     grub_uint32_t boot_catalog;
 131     grub_uint8_t  boot_catalog_sector[2048];
 132
 133     grub_uint32_t img_chunk_offset;
 134     grub_uint32_t img_chunk_num;
 135
 136     grub_uint32_t override_chunk_offset;
 137     grub_uint32_t override_chunk_num;
 138
 139     grub_uint32_t virt_chunk_offset;
 140     grub_uint32_t virt_chunk_num;
 141 }ventoy_chain_head;
 142
 143 typedef struct ventoy_img_chunk
 144 {
 145     grub_uint32_t img_start_sector; // sector size: 2KB
 146     grub_uint32_t img_end_sector;   // included
 147
 148     grub_uint64_t disk_start_sector; // in disk_sector_size
 149     grub_uint64_t disk_end_sector;   // included
 150 }ventoy_img_chunk;
 151
 152
 153 typedef struct ventoy_override_chunk
 154 {
 155     grub_uint64_t img_offset;
 156     grub_uint32_t override_size;
 157     grub_uint8_t  override_data[512];
 158 }ventoy_override_chunk;
 159
 160 typedef struct ventoy_virt_chunk
 161 {
 162     grub_uint32_t mem_sector_start;
 163     grub_uint32_t mem_sector_end;
 164     grub_uint32_t mem_sector_offset;
 165     grub_uint32_t remap_sector_start;
 166     grub_uint32_t remap_sector_end;
 167     grub_uint32_t org_sector_start;
 168 }ventoy_virt_chunk;
 169
 170 #define DEFAULT_CHUNK_NUM   1024
 171 typedef struct ventoy_img_chunk_list
 172 {
 173     grub_uint32_t max_chunk;
 174     grub_uint32_t cur_chunk;
 175     ventoy_img_chunk *chunk;
 176 }ventoy_img_chunk_list;
 177
 178
 179 #pragma pack()
 180
 181 #define ventoy_filt_register grub_file_filter_register
 182
 183 typedef const char * (*grub_env_get_pf)(const char *name);
 184
 185 #pragma pack(1)
 186
 187 #define GRUB_FILE_REPLACE_MAGIC  0x1258BEEF
 188
 189 typedef struct ventoy_grub_param_file_replace
 190 {
 191     grub_uint32_t magic;
 192     char old_file_name[4][256];
 193     grub_uint32_t old_name_cnt;
 194     grub_uint32_t new_file_virtual_id;
 195 }ventoy_grub_param_file_replace;
 196
 197 typedef struct ventoy_grub_param
 198 {
 199     grub_env_get_pf grub_env_get;
 200
 201     ventoy_grub_param_file_replace file_replace;
 202 }ventoy_grub_param;
 203
 204 #pragma pack()
 205
 206
 207
 208 int grub_fat_get_file_chunk(grub_uint64_t part_start, grub_file_t file, ventoy_img_chunk_list *chunk_list);
 209 grub_uint64_t grub_iso9660_get_last_read_pos(grub_file_t file);
 210 grub_uint64_t grub_iso9660_get_last_file_dirent_pos(grub_file_t file);
 211 grub_uint64_t grub_udf_get_file_offset(grub_file_t file);
 212 grub_uint64_t grub_udf_get_last_pd_size_offset(void);
 213 grub_uint64_t grub_udf_get_last_file_attr_offset
 214 (
 215     grub_file_t file,
 216     grub_uint32_t *startBlock,
 217     grub_uint64_t *fe_entry_size_offset
 218 );
 219 int ventoy_is_efi_os(void);
 220
 221 #endif /* __VENTOY_H__ */
 222