drivers/md/dm-era-target.c

40 	 * disk.
46  * This does not free off the on disk bitset as this will normally be done
87  * Wipes the in-core bitset, and creates a new on disk bitset.
156  * On disk metadata layout
203 	struct superblock_disk *disk = dm_block_data(b);
205 	disk->blocknr = cpu_to_le64(dm_block_location(b));
206 	disk->csum = cpu_to_le32(dm_bm_checksum(&disk->flags,
211 static int check_metadata_version(struct superblock_disk *disk)
213 	uint32_t metadata_version = le32_to_cpu(disk->version);
228 	struct superblock_disk *disk = dm_block_data(b);
231 	if (dm_block_location(b) != le64_to_cpu(disk->blocknr)) {
233 		      __func__, le64_to_cpu(disk->blocknr),
238 	if (le64_to_cpu(disk->magic) != SUPERBLOCK_MAGIC) {
240 		      __func__, le64_to_cpu(disk->magic),
245 	csum_le = cpu_to_le32(dm_bm_checksum(&disk->flags,
248 	if (csum_le != disk->csum) {
250 		      __func__, le32_to_cpu(csum_le), le32_to_cpu(disk->csum));
254 	return check_metadata_version(disk);
364 static void ws_pack(const struct writeset_metadata *core, struct writeset_disk *disk)
366 	disk->nr_bits = cpu_to_le32(core->nr_bits);
367 	disk->root = cpu_to_le64(core->root);
370 static void ws_unpack(const struct writeset_disk *disk, struct writeset_metadata *core)
372 	core->nr_bits = le32_to_cpu(disk->nr_bits);
373 	core->root = le64_to_cpu(disk->root);
493 static void copy_sm_root(struct era_metadata *md, struct superblock_disk *disk)
495 	memcpy(&disk->metadata_space_map_root,
505 static void prepare_superblock(struct era_metadata *md, struct superblock_disk *disk)
507 	disk->magic = cpu_to_le64(SUPERBLOCK_MAGIC);
508 	disk->flags = cpu_to_le32(0ul);
511 	memset(disk->uuid, 0, sizeof(disk->uuid));
512 	disk->version = cpu_to_le32(MAX_ERA_VERSION);
514 	copy_sm_root(md, disk);
516 	disk->data_block_size = cpu_to_le32(md->block_size);
517 	disk->metadata_block_size = cpu_to_le32(DM_ERA_METADATA_BLOCK_SIZE >> SECTOR_SHIFT);
518 	disk->nr_blocks = cpu_to_le32(md->nr_blocks);
519 	disk->current_era = cpu_to_le32(md->current_era);
521 	ws_pack(&md->current_writeset->md, &disk->current_writeset);
522 	disk->writeset_tree_root = cpu_to_le64(md->writeset_tree_root);
523 	disk->era_array_root = cpu_to_le64(md->era_array_root);
524 	disk->metadata_snap = cpu_to_le64(md->metadata_snap);
531 	struct superblock_disk *disk;
543 	disk = dm_block_data(sblock);
544 	prepare_superblock(md, disk);
574 	struct superblock_disk *disk;
582 	disk = dm_block_data(sblock);
585 	if (le32_to_cpu(disk->data_block_size) != md->block_size) {
587 		      le32_to_cpu(disk->data_block_size), md->block_size);
593 			       disk->metadata_space_map_root,
594 			       sizeof(disk->metadata_space_map_root),
603 	md->nr_blocks = le32_to_cpu(disk->nr_blocks);
604 	md->current_era = le32_to_cpu(disk->current_era);
606 	ws_unpack(&disk->current_writeset, &md->current_writeset->md);
607 	md->writeset_tree_root = le64_to_cpu(disk->writeset_tree_root);
608 	md->era_array_root = le64_to_cpu(disk->era_array_root);
609 	md->metadata_snap = le64_to_cpu(disk->metadata_snap);
752 	struct writeset_disk disk;
762 			    md->writeset_tree_root, &key, &disk);
773 	ws_unpack(&disk, &d->writeset);
1096 	struct superblock_disk *disk;
1115 	disk = dm_block_data(clone);
1117 			 le64_to_cpu(disk->writeset_tree_root));
1124 	r = dm_array_del(&md->era_array_info, le64_to_cpu(disk->era_array_root));
1309 			 * Only update the in-core writeset if the on-disk one