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()
332 	return open_layout_reader(layout, region, -layout->super.start_offset,  in open_region_reader()
347 	return open_layout_writer(layout, region, -layout->super.start_offset,  in open_region_writer()
352 				      struct super_block_data *super)  in generate_super_block_data()  argument
354 	memset(super, 0, sizeof(*super));  in generate_super_block_data()
355 	memcpy(super->magic_label, LAYOUT_MAGIC, MAGIC_SIZE);  in generate_super_block_data()
356 	create_unique_nonce_data(super->nonce_info);  in generate_super_block_data()
358 	super->nonce = generate_primary_nonce(super->nonce_info,  in generate_super_block_data()
359 					      sizeof(super->nonce_info));  in generate_super_block_data()
360 	super->version = SUPER_VERSION_CURRENT;  in generate_super_block_data()
361 	super->block_size = sls->block_size;  in generate_super_block_data()
362 	super->index_count = 1;  in generate_super_block_data()
363 	super->max_saves = sls->save_count;  in generate_super_block_data()
364 	super->open_chapter_blocks = sls->open_chapter_blocks;  in generate_super_block_data()
365 	super->page_map_blocks = sls->page_map_blocks;  in generate_super_block_data()
366 	super->volume_offset = 0;  in generate_super_block_data()
367 	super->start_offset = 0;  in generate_super_block_data()
377 	u64 primary_nonce = layout->super.nonce;  in define_sub_index_nonce()
432 	generate_super_block_data(sls, &layout->super);  in initialize_layout()
634 	reset_index_save_layout(isl, layout->super.page_map_blocks);  in invalidate_old_save()
644 	for (i = 0; i < layout->super.max_saves; i++) {  in discard_index_state_data()
665 	u16 region_count = 5 + layout->super.max_saves;  in make_layout_region_table()
682 	for (i = 0; i < layout->super.max_saves; i++)  in make_layout_region_table()
687 	if (is_converted_super_block(&layout->super)) {  in make_layout_region_table()
691 			   sizeof(layout->super.volume_offset) -  in make_layout_region_table()
692 			   sizeof(layout->super.start_offset));  in make_layout_region_table()
723 	memcpy(buffer + offset, &layout->super.magic_label, MAGIC_SIZE);  in write_layout_header()
725 	memcpy(buffer + offset, &layout->super.nonce_info, NONCE_INFO_SIZE);  in write_layout_header()
727 	encode_u64_le(buffer, &offset, layout->super.nonce);  in write_layout_header()
728 	encode_u32_le(buffer, &offset, layout->super.version);  in write_layout_header()
729 	encode_u32_le(buffer, &offset, layout->super.block_size);  in write_layout_header()
730 	encode_u16_le(buffer, &offset, layout->super.index_count);  in write_layout_header()
731 	encode_u16_le(buffer, &offset, layout->super.max_saves);  in write_layout_header()
733 	encode_u64_le(buffer, &offset, layout->super.open_chapter_blocks);  in write_layout_header()
734 	encode_u64_le(buffer, &offset, layout->super.page_map_blocks);  in write_layout_header()
736 	if (is_converted_super_block(&layout->super)) {  in write_layout_header()
737 		encode_u64_le(buffer, &offset, layout->super.volume_offset);  in write_layout_header()
738 		encode_u64_le(buffer, &offset, layout->super.start_offset);  in write_layout_header()
760 	result = uds_write_config_contents(writer, config, layout->super.version);  in write_uds_index_config()
866 	for (i = 0; i < layout->super.max_saves; i++) {  in find_latest_uds_index_save_slot()
968 	for (i = 0; i < layout->super.max_saves; i++) {  in select_oldest_index_save_layout()
981 					  struct super_block_data *super,  in instantiate_index_save_layout()  argument
1005 		.block_count = super->page_map_blocks,  in instantiate_index_save_layout()
1009 	next_block += super->page_map_blocks;  in instantiate_index_save_layout()
1012 		       super->page_map_blocks -  in instantiate_index_save_layout()
1013 		       super->open_chapter_blocks);  in instantiate_index_save_layout()
1029 		.block_count = super->open_chapter_blocks,  in instantiate_index_save_layout()
1034 	next_block += super->open_chapter_blocks;  in instantiate_index_save_layout()
1056 	instantiate_index_save_layout(isl, &layout->super, layout->index.nonce,  in setup_uds_index_save_slot()
1201 	struct super_block_data *super = &layout->super;  in read_super_block_data()  local
1205 	result = vdo_allocate(saved_size, u8, "super block data", &buffer);  in read_super_block_data()
1215 	memcpy(&super->magic_label, buffer, MAGIC_SIZE);  in read_super_block_data()
1217 	memcpy(&super->nonce_info, buffer + offset, NONCE_INFO_SIZE);  in read_super_block_data()
1219 	decode_u64_le(buffer, &offset, &super->nonce);  in read_super_block_data()
1220 	decode_u32_le(buffer, &offset, &super->version);  in read_super_block_data()
1221 	decode_u32_le(buffer, &offset, &super->block_size);  in read_super_block_data()
1222 	decode_u16_le(buffer, &offset, &super->index_count);  in read_super_block_data()
1223 	decode_u16_le(buffer, &offset, &super->max_saves);  in read_super_block_data()
1225 	decode_u64_le(buffer, &offset, &super->open_chapter_blocks);  in read_super_block_data()
1226 	decode_u64_le(buffer, &offset, &super->page_map_blocks);  in read_super_block_data()
1228 	if (is_converted_super_block(super)) {  in read_super_block_data()
1229 		decode_u64_le(buffer, &offset, &super->volume_offset);  in read_super_block_data()
1230 		decode_u64_le(buffer, &offset, &super->start_offset);  in read_super_block_data()
1232 		super->volume_offset = 0;  in read_super_block_data()
1233 		super->start_offset = 0;  in read_super_block_data()
1238 	if (memcmp(super->magic_label, LAYOUT_MAGIC, MAGIC_SIZE) != 0)  in read_super_block_data()
1242 	if ((super->version < SUPER_VERSION_MINIMUM) ||  in read_super_block_data()
1243 	    (super->version == 4) || (super->version == 5) || (super->version == 6) ||  in read_super_block_data()
1244 	    (super->version > SUPER_VERSION_MAXIMUM)) {  in read_super_block_data()
1247 					      super->version);  in read_super_block_data()
1250 	if (super->volume_offset < super->start_offset) {  in read_super_block_data()
1253 					      (unsigned long long) super->start_offset,  in read_super_block_data()
1254 					      (unsigned long long) super->volume_offset);  in read_super_block_data()
1258 	if (super->index_count != 1) {  in read_super_block_data()
1261 					      super->index_count);  in read_super_block_data()
1264 	if (generate_primary_nonce(super->nonce_info, sizeof(super->nonce_info)) != super->nonce) {  in read_super_block_data()
1312 	next_block += sil->volume.block_count + layout->super.volume_offset;  in verify_sub_index()
1314 	for (i = 0; i < layout->super.max_saves; i++) {  in verify_sub_index()
1324 	next_block -= layout->super.volume_offset;  in verify_sub_index()
1339 	result = vdo_allocate(layout->super.max_saves, struct index_save_layout,  in reconstitute_layout()
1365 	result = verify_region(&layout->seal, next_block + layout->super.volume_offset,  in reconstitute_layout()
1383 	struct super_block_data *super = &layout->super;  in load_super_block()  local
1401 	if (super->block_size != block_size) {  in load_super_block()
1405 					      super->block_size, block_size);  in load_super_block()
1408 	first_block -= (super->volume_offset - super->start_offset);  in load_super_block()
1596 	for (j = 0; j < layout->super.max_saves; j++) {  in load_sub_index_regions()
1626 	offset = layout->super.volume_offset - layout->super.start_offset;  in verify_uds_index_config()
1755 			layout->super.volume_offset -  in uds_open_volume_bufio()
1756 			layout->super.start_offset);  in uds_open_volume_bufio()