85  * Super block version 2 is the first released version.
87  * Super block version 3 is the normal version used from RHEL 8.2 onwards.
89  * Super block versions 4 through 6 were incremental development versions and
92  * Super block version 7 is used for volumes which have been reduced in size by one chapter in
195 	struct super_block_data super;  member
216 static inline bool is_converted_super_block(struct super_block_data *super)  in is_converted_super_block()  argument
218 	return super->version == 7;  in is_converted_super_block()
307 	return open_layout_reader(layout, region, -layout->super.start_offset,  in open_region_reader()
322 	return open_layout_writer(layout, region, -layout->super.start_offset,  in open_region_writer()
327 				      struct super_block_data *super)  in generate_super_block_data()  argument
329 	memset(super, 0, sizeof(*super));  in generate_super_block_data()
330 	memcpy(super->magic_label, LAYOUT_MAGIC, MAGIC_SIZE);  in generate_super_block_data()
331 	create_unique_nonce_data(super->nonce_info);  in generate_super_block_data()
333 	super->nonce = generate_primary_nonce(super->nonce_info,  in generate_super_block_data()
334 					      sizeof(super->nonce_info));  in generate_super_block_data()
335 	super->version = SUPER_VERSION_CURRENT;  in generate_super_block_data()
336 	super->block_size = sls->block_size;  in generate_super_block_data()
337 	super->index_count = 1;  in generate_super_block_data()
338 	super->max_saves = sls->save_count;  in generate_super_block_data()
339 	super->open_chapter_blocks = sls->open_chapter_blocks;  in generate_super_block_data()
340 	super->page_map_blocks = sls->page_map_blocks;  in generate_super_block_data()
341 	super->volume_offset = 0;  in generate_super_block_data()
342 	super->start_offset = 0;  in generate_super_block_data()
352 	u64 primary_nonce = layout->super.nonce;  in define_sub_index_nonce()
407 	generate_super_block_data(sls, &layout->super);  in initialize_layout()
609 	reset_index_save_layout(isl, layout->super.page_map_blocks);  in invalidate_old_save()
619 	for (i = 0; i < layout->super.max_saves; i++) {  in discard_index_state_data()
640 	u16 region_count = 5 + layout->super.max_saves;  in make_layout_region_table()
657 	for (i = 0; i < layout->super.max_saves; i++)  in make_layout_region_table()
662 	if (is_converted_super_block(&layout->super)) {  in make_layout_region_table()
666 			   sizeof(layout->super.volume_offset) -  in make_layout_region_table()
667 			   sizeof(layout->super.start_offset));  in make_layout_region_table()
698 	memcpy(buffer + offset, &layout->super.magic_label, MAGIC_SIZE);  in write_layout_header()
700 	memcpy(buffer + offset, &layout->super.nonce_info, NONCE_INFO_SIZE);  in write_layout_header()
702 	encode_u64_le(buffer, &offset, layout->super.nonce);  in write_layout_header()
703 	encode_u32_le(buffer, &offset, layout->super.version);  in write_layout_header()
704 	encode_u32_le(buffer, &offset, layout->super.block_size);  in write_layout_header()
705 	encode_u16_le(buffer, &offset, layout->super.index_count);  in write_layout_header()
706 	encode_u16_le(buffer, &offset, layout->super.max_saves);  in write_layout_header()
708 	encode_u64_le(buffer, &offset, layout->super.open_chapter_blocks);  in write_layout_header()
709 	encode_u64_le(buffer, &offset, layout->super.page_map_blocks);  in write_layout_header()
711 	if (is_converted_super_block(&layout->super)) {  in write_layout_header()
712 		encode_u64_le(buffer, &offset, layout->super.volume_offset);  in write_layout_header()
713 		encode_u64_le(buffer, &offset, layout->super.start_offset);  in write_layout_header()
735 	result = uds_write_config_contents(writer, config, layout->super.version);  in write_uds_index_config()
841 	for (i = 0; i < layout->super.max_saves; i++) {  in find_latest_uds_index_save_slot()
943 	for (i = 0; i < layout->super.max_saves; i++) {  in select_oldest_index_save_layout()
956 					  struct super_block_data *super,  in instantiate_index_save_layout()  argument
980 		.block_count = super->page_map_blocks,  in instantiate_index_save_layout()
984 	next_block += super->page_map_blocks;  in instantiate_index_save_layout()
987 		       super->page_map_blocks -  in instantiate_index_save_layout()
988 		       super->open_chapter_blocks);  in instantiate_index_save_layout()
1004 		.block_count = super->open_chapter_blocks,  in instantiate_index_save_layout()
1009 	next_block += super->open_chapter_blocks;  in instantiate_index_save_layout()
1031 	instantiate_index_save_layout(isl, &layout->super, layout->index.nonce,  in setup_uds_index_save_slot()
1176 	struct super_block_data *super = &layout->super;  in read_super_block_data()  local
1180 	result = vdo_allocate(saved_size, u8, "super block data", &buffer);  in read_super_block_data()
1190 	memcpy(&super->magic_label, buffer, MAGIC_SIZE);  in read_super_block_data()
1192 	memcpy(&super->nonce_info, buffer + offset, NONCE_INFO_SIZE);  in read_super_block_data()
1194 	decode_u64_le(buffer, &offset, &super->nonce);  in read_super_block_data()
1195 	decode_u32_le(buffer, &offset, &super->version);  in read_super_block_data()
1196 	decode_u32_le(buffer, &offset, &super->block_size);  in read_super_block_data()
1197 	decode_u16_le(buffer, &offset, &super->index_count);  in read_super_block_data()
1198 	decode_u16_le(buffer, &offset, &super->max_saves);  in read_super_block_data()
1200 	decode_u64_le(buffer, &offset, &super->open_chapter_blocks);  in read_super_block_data()
1201 	decode_u64_le(buffer, &offset, &super->page_map_blocks);  in read_super_block_data()
1203 	if (is_converted_super_block(super)) {  in read_super_block_data()
1204 		decode_u64_le(buffer, &offset, &super->volume_offset);  in read_super_block_data()
1205 		decode_u64_le(buffer, &offset, &super->start_offset);  in read_super_block_data()
1207 		super->volume_offset = 0;  in read_super_block_data()
1208 		super->start_offset = 0;  in read_super_block_data()
1213 	if (memcmp(super->magic_label, LAYOUT_MAGIC, MAGIC_SIZE) != 0)  in read_super_block_data()
1217 	if ((super->version < SUPER_VERSION_MINIMUM) ||  in read_super_block_data()
1218 	    (super->version == 4) || (super->version == 5) || (super->version == 6) ||  in read_super_block_data()
1219 	    (super->version > SUPER_VERSION_MAXIMUM)) {  in read_super_block_data()
1222 					      super->version);  in read_super_block_data()
1225 	if (super->volume_offset < super->start_offset) {  in read_super_block_data()
1228 					      (unsigned long long) super->start_offset,  in read_super_block_data()
1229 					      (unsigned long long) super->volume_offset);  in read_super_block_data()
1233 	if (super->index_count != 1) {  in read_super_block_data()
1236 					      super->index_count);  in read_super_block_data()
1239 	if (generate_primary_nonce(super->nonce_info, sizeof(super->nonce_info)) != super->nonce) {  in read_super_block_data()
1287 	next_block += sil->volume.block_count + layout->super.volume_offset;  in verify_sub_index()
1289 	for (i = 0; i < layout->super.max_saves; i++) {  in verify_sub_index()
1299 	next_block -= layout->super.volume_offset;  in verify_sub_index()
1314 	result = vdo_allocate(layout->super.max_saves, struct index_save_layout,  in reconstitute_layout()
1340 	result = verify_region(&layout->seal, next_block + layout->super.volume_offset,  in reconstitute_layout()
1358 	struct super_block_data *super = &layout->super;  in load_super_block()  local
1376 	if (super->block_size != block_size) {  in load_super_block()
1380 					      super->block_size, block_size);  in load_super_block()
1383 	first_block -= (super->volume_offset - super->start_offset);  in load_super_block()
1571 	for (j = 0; j < layout->super.max_saves; j++) {  in load_sub_index_regions()
1601 	offset = layout->super.volume_offset - layout->super.start_offset;  in verify_uds_index_config()
1730 			layout->super.volume_offset -  in uds_open_volume_bufio()
1731 			layout->super.start_offset);  in uds_open_volume_bufio()