86  * Super block version 2 is the first released version.
88  * Super block version 3 is the normal version used from RHEL 8.2 onwards.
90  * Super block versions 4 through 6 were incremental development versions and
93  * Super block version 7 is used for volumes which have been reduced in size by one chapter in
194 	struct super_block_data super;  member
215 static inline bool is_converted_super_block(struct super_block_data *super)  in is_converted_super_block()  argument
217 	return super->version == 7;  in is_converted_super_block()
306 	return open_layout_reader(layout, region, -layout->super.start_offset,  in open_region_reader()
321 	return open_layout_writer(layout, region, -layout->super.start_offset,  in open_region_writer()
326 				      struct super_block_data *super)  in generate_super_block_data()  argument
328 	memset(super, 0, sizeof(*super));  in generate_super_block_data()
329 	memcpy(super->magic_label, LAYOUT_MAGIC, MAGIC_SIZE);  in generate_super_block_data()
330 	create_unique_nonce_data(super->nonce_info);  in generate_super_block_data()
332 	super->nonce = generate_primary_nonce(super->nonce_info,  in generate_super_block_data()
333 					      sizeof(super->nonce_info));  in generate_super_block_data()
334 	super->version = SUPER_VERSION_CURRENT;  in generate_super_block_data()
335 	super->block_size = sls->block_size;  in generate_super_block_data()
336 	super->index_count = 1;  in generate_super_block_data()
337 	super->max_saves = sls->save_count;  in generate_super_block_data()
338 	super->open_chapter_blocks = sls->open_chapter_blocks;  in generate_super_block_data()
339 	super->page_map_blocks = sls->page_map_blocks;  in generate_super_block_data()
340 	super->volume_offset = 0;  in generate_super_block_data()
341 	super->start_offset = 0;  in generate_super_block_data()
351 	u64 primary_nonce = layout->super.nonce;  in define_sub_index_nonce()
406 	generate_super_block_data(sls, &layout->super);  in initialize_layout()
608 	reset_index_save_layout(isl, layout->super.page_map_blocks);  in invalidate_old_save()
618 	for (i = 0; i < layout->super.max_saves; i++) {  in discard_index_state_data()
639 	u16 region_count = 5 + layout->super.max_saves;  in make_layout_region_table()
656 	for (i = 0; i < layout->super.max_saves; i++)  in make_layout_region_table()
661 	if (is_converted_super_block(&layout->super)) {  in make_layout_region_table()
665 			   sizeof(layout->super.volume_offset) -  in make_layout_region_table()
666 			   sizeof(layout->super.start_offset));  in make_layout_region_table()
697 	memcpy(buffer + offset, &layout->super.magic_label, MAGIC_SIZE);  in write_layout_header()
699 	memcpy(buffer + offset, &layout->super.nonce_info, NONCE_INFO_SIZE);  in write_layout_header()
701 	encode_u64_le(buffer, &offset, layout->super.nonce);  in write_layout_header()
702 	encode_u32_le(buffer, &offset, layout->super.version);  in write_layout_header()
703 	encode_u32_le(buffer, &offset, layout->super.block_size);  in write_layout_header()
704 	encode_u16_le(buffer, &offset, layout->super.index_count);  in write_layout_header()
705 	encode_u16_le(buffer, &offset, layout->super.max_saves);  in write_layout_header()
707 	encode_u64_le(buffer, &offset, layout->super.open_chapter_blocks);  in write_layout_header()
708 	encode_u64_le(buffer, &offset, layout->super.page_map_blocks);  in write_layout_header()
710 	if (is_converted_super_block(&layout->super)) {  in write_layout_header()
711 		encode_u64_le(buffer, &offset, layout->super.volume_offset);  in write_layout_header()
712 		encode_u64_le(buffer, &offset, layout->super.start_offset);  in write_layout_header()
734 	result = uds_write_config_contents(writer, config, layout->super.version);  in write_uds_index_config()
840 	for (i = 0; i < layout->super.max_saves; i++) {  in find_latest_uds_index_save_slot()
942 	for (i = 0; i < layout->super.max_saves; i++) {  in select_oldest_index_save_layout()
955 					  struct super_block_data *super,  in instantiate_index_save_layout()  argument
979 		.block_count = super->page_map_blocks,  in instantiate_index_save_layout()
983 	next_block += super->page_map_blocks;  in instantiate_index_save_layout()
986 		       super->page_map_blocks -  in instantiate_index_save_layout()
987 		       super->open_chapter_blocks);  in instantiate_index_save_layout()
1003 		.block_count = super->open_chapter_blocks,  in instantiate_index_save_layout()
1008 	next_block += super->open_chapter_blocks;  in instantiate_index_save_layout()
1030 	instantiate_index_save_layout(isl, &layout->super, layout->index.nonce,  in setup_uds_index_save_slot()
1175 	struct super_block_data *super = &layout->super;  in read_super_block_data()  local
1179 	result = vdo_allocate(saved_size, u8, "super block data", &buffer);  in read_super_block_data()
1189 	memcpy(&super->magic_label, buffer, MAGIC_SIZE);  in read_super_block_data()
1191 	memcpy(&super->nonce_info, buffer + offset, NONCE_INFO_SIZE);  in read_super_block_data()
1193 	decode_u64_le(buffer, &offset, &super->nonce);  in read_super_block_data()
1194 	decode_u32_le(buffer, &offset, &super->version);  in read_super_block_data()
1195 	decode_u32_le(buffer, &offset, &super->block_size);  in read_super_block_data()
1196 	decode_u16_le(buffer, &offset, &super->index_count);  in read_super_block_data()
1197 	decode_u16_le(buffer, &offset, &super->max_saves);  in read_super_block_data()
1199 	decode_u64_le(buffer, &offset, &super->open_chapter_blocks);  in read_super_block_data()
1200 	decode_u64_le(buffer, &offset, &super->page_map_blocks);  in read_super_block_data()
1202 	if (is_converted_super_block(super)) {  in read_super_block_data()
1203 		decode_u64_le(buffer, &offset, &super->volume_offset);  in read_super_block_data()
1204 		decode_u64_le(buffer, &offset, &super->start_offset);  in read_super_block_data()
1206 		super->volume_offset = 0;  in read_super_block_data()
1207 		super->start_offset = 0;  in read_super_block_data()
1212 	if (memcmp(super->magic_label, LAYOUT_MAGIC, MAGIC_SIZE) != 0)  in read_super_block_data()
1216 	if ((super->version < SUPER_VERSION_MINIMUM) ||  in read_super_block_data()
1217 	    (super->version == 4) || (super->version == 5) || (super->version == 6) ||  in read_super_block_data()
1218 	    (super->version > SUPER_VERSION_MAXIMUM)) {  in read_super_block_data()
1221 					      super->version);  in read_super_block_data()
1224 	if (super->volume_offset < super->start_offset) {  in read_super_block_data()
1227 					      (unsigned long long) super->start_offset,  in read_super_block_data()
1228 					      (unsigned long long) super->volume_offset);  in read_super_block_data()
1232 	if (super->index_count != 1) {  in read_super_block_data()
1235 					      super->index_count);  in read_super_block_data()
1238 	if (generate_primary_nonce(super->nonce_info, sizeof(super->nonce_info)) != super->nonce) {  in read_super_block_data()
1286 	next_block += sil->volume.block_count + layout->super.volume_offset;  in verify_sub_index()
1288 	for (i = 0; i < layout->super.max_saves; i++) {  in verify_sub_index()
1298 	next_block -= layout->super.volume_offset;  in verify_sub_index()
1313 	result = vdo_allocate(layout->super.max_saves, struct index_save_layout,  in reconstitute_layout()
1339 	result = verify_region(&layout->seal, next_block + layout->super.volume_offset,  in reconstitute_layout()
1357 	struct super_block_data *super = &layout->super;  in load_super_block()  local
1375 	if (super->block_size != block_size) {  in load_super_block()
1379 					      super->block_size, block_size);  in load_super_block()
1382 	first_block -= (super->volume_offset - super->start_offset);  in load_super_block()
1570 	for (j = 0; j < layout->super.max_saves; j++) {  in load_sub_index_regions()
1600 	offset = layout->super.volume_offset - layout->super.start_offset;  in verify_uds_index_config()
1729 			layout->super.volume_offset -  in uds_open_volume_bufio()
1730 			layout->super.start_offset);  in uds_open_volume_bufio()