diff options
Diffstat (limited to 'drivers/md/dm-thin-metadata.c')
| -rw-r--r-- | drivers/md/dm-thin-metadata.c | 109 |
1 files changed, 58 insertions, 51 deletions
diff --git a/drivers/md/dm-thin-metadata.c b/drivers/md/dm-thin-metadata.c index ce487aada0d8..5ead655706d4 100644 --- a/drivers/md/dm-thin-metadata.c +++ b/drivers/md/dm-thin-metadata.c @@ -422,6 +422,41 @@ static void __setup_btree_details(struct dm_pool_metadata *pmd) pmd->details_info.value_type.equal = NULL; } +static int __write_initial_superblock(struct dm_pool_metadata *pmd) +{ + int r; + struct dm_block *sblock; + struct thin_disk_superblock *disk_super; + sector_t bdev_size = i_size_read(pmd->bdev->bd_inode) >> SECTOR_SHIFT; + + if (bdev_size > THIN_METADATA_MAX_SECTORS) + bdev_size = THIN_METADATA_MAX_SECTORS; + + r = superblock_lock_zero(pmd, &sblock); + if (r) + return r; + + disk_super = dm_block_data(sblock); + disk_super->magic = cpu_to_le64(THIN_SUPERBLOCK_MAGIC); + disk_super->version = cpu_to_le32(THIN_VERSION); + disk_super->time = 0; + disk_super->metadata_block_size = cpu_to_le32(THIN_METADATA_BLOCK_SIZE >> SECTOR_SHIFT); + disk_super->metadata_nr_blocks = cpu_to_le64(bdev_size >> SECTOR_TO_BLOCK_SHIFT); + disk_super->data_block_size = cpu_to_le32(pmd->data_block_size); + + r = dm_bm_unlock(sblock); + if (r) + return r; + + pmd->flags = 0; + r = dm_pool_commit_metadata(pmd); + if (r < 0) + DMERR("%s: dm_pool_commit_metadata() failed, error = %d", + __func__, r); + + return r; +} + static int __open_or_format_metadata(struct dm_pool_metadata *pmd, struct dm_block_manager *bm, dm_block_t nr_blocks, int create) @@ -495,6 +530,23 @@ static int __open_or_format_metadata(struct dm_pool_metadata *pmd, pmd->trans_id = 0; pmd->flags = 0; + if (!create) + return 0; + + r = dm_btree_empty(&pmd->info, &pmd->root); + if (r < 0) + goto bad_data_sm; + + r = dm_btree_empty(&pmd->details_info, &pmd->details_root); + if (r < 0) { + DMERR("couldn't create devices root"); + goto bad_data_sm; + } + + r = __write_initial_superblock(pmd); + if (r) + goto bad_data_sm; + return 0; bad_data_sm: @@ -695,11 +747,8 @@ struct dm_pool_metadata *dm_pool_metadata_open(struct block_device *bdev, sector_t data_block_size) { int r; - struct thin_disk_superblock *disk_super; struct dm_pool_metadata *pmd; - sector_t bdev_size = i_size_read(bdev->bd_inode) >> SECTOR_SHIFT; int create; - struct dm_block *sblock; pmd = kmalloc(sizeof(*pmd), GFP_KERNEL); if (!pmd) { @@ -711,6 +760,7 @@ struct dm_pool_metadata *dm_pool_metadata_open(struct block_device *bdev, pmd->time = 0; INIT_LIST_HEAD(&pmd->thin_devices); pmd->bdev = bdev; + pmd->data_block_size = data_block_size; r = __create_persistent_data_objects(pmd, 0, &create); if (r) { @@ -720,57 +770,14 @@ struct dm_pool_metadata *dm_pool_metadata_open(struct block_device *bdev, if (!create) { r = __begin_transaction(pmd); - if (r < 0) - goto bad; - return pmd; - } - - /* - * Create. - */ - r = superblock_lock_zero(pmd, &sblock); - if (r) - goto bad; - - if (bdev_size > THIN_METADATA_MAX_SECTORS) - bdev_size = THIN_METADATA_MAX_SECTORS; - - disk_super = dm_block_data(sblock); - disk_super->magic = cpu_to_le64(THIN_SUPERBLOCK_MAGIC); - disk_super->version = cpu_to_le32(THIN_VERSION); - disk_super->time = 0; - disk_super->metadata_block_size = cpu_to_le32(THIN_METADATA_BLOCK_SIZE >> SECTOR_SHIFT); - disk_super->metadata_nr_blocks = cpu_to_le64(bdev_size >> SECTOR_TO_BLOCK_SHIFT); - disk_super->data_block_size = cpu_to_le32(data_block_size); - - r = dm_bm_unlock(sblock); - if (r < 0) - goto bad; - - r = dm_btree_empty(&pmd->info, &pmd->root); - if (r < 0) - goto bad; - - r = dm_btree_empty(&pmd->details_info, &pmd->details_root); - if (r < 0) { - DMERR("couldn't create devices root"); - goto bad; - } - - pmd->flags = 0; - r = dm_pool_commit_metadata(pmd); - if (r < 0) { - DMERR("%s: dm_pool_commit_metadata() failed, error = %d", - __func__, r); - goto bad; + if (r < 0) { + if (dm_pool_metadata_close(pmd) < 0) + DMWARN("%s: dm_pool_metadata_close() failed.", __func__); + return ERR_PTR(r); + } } return pmd; - -bad: - if (dm_pool_metadata_close(pmd) < 0) - DMWARN("%s: dm_pool_metadata_close() failed.", __func__); - return ERR_PTR(r); } int dm_pool_metadata_close(struct dm_pool_metadata *pmd) |