diff options
Diffstat (limited to 'fs/btrfs/disk-io.c')
| -rw-r--r-- | fs/btrfs/disk-io.c | 93 |
1 files changed, 51 insertions, 42 deletions
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c index 7278789ff8a7..7c6f0bbb54a5 100644 --- a/fs/btrfs/disk-io.c +++ b/fs/btrfs/disk-io.c @@ -358,16 +358,14 @@ static int btrfs_check_super_csum(struct btrfs_fs_info *fs_info, SHASH_DESC_ON_STACK(shash, fs_info->csum_shash); shash->tfm = fs_info->csum_shash; - crypto_shash_init(shash); /* * The super_block structure does not span the whole * BTRFS_SUPER_INFO_SIZE range, we expect that the unused space is * filled with zeros and is included in the checksum. */ - crypto_shash_update(shash, raw_disk_sb + BTRFS_CSUM_SIZE, - BTRFS_SUPER_INFO_SIZE - BTRFS_CSUM_SIZE); - crypto_shash_final(shash, result); + crypto_shash_digest(shash, raw_disk_sb + BTRFS_CSUM_SIZE, + BTRFS_SUPER_INFO_SIZE - BTRFS_CSUM_SIZE, result); if (memcmp(disk_sb->csum, result, btrfs_super_csum_size(disk_sb))) return 1; @@ -709,9 +707,7 @@ static void end_workqueue_bio(struct bio *bio) else wq = fs_info->endio_write_workers; } else { - if (unlikely(end_io_wq->metadata == BTRFS_WQ_ENDIO_DIO_REPAIR)) - wq = fs_info->endio_repair_workers; - else if (end_io_wq->metadata == BTRFS_WQ_ENDIO_RAID56) + if (end_io_wq->metadata == BTRFS_WQ_ENDIO_RAID56) wq = fs_info->endio_raid56_workers; else if (end_io_wq->metadata) wq = fs_info->endio_meta_workers; @@ -1135,9 +1131,12 @@ static void __setup_root(struct btrfs_root *root, struct btrfs_fs_info *fs_info, root->log_transid = 0; root->log_transid_committed = -1; root->last_log_commit = 0; - if (!dummy) + if (!dummy) { extent_io_tree_init(fs_info, &root->dirty_log_pages, IO_TREE_ROOT_DIRTY_LOG_PAGES, NULL); + extent_io_tree_init(fs_info, &root->log_csum_range, + IO_TREE_LOG_CSUM_RANGE, NULL); + } memset(&root->root_key, 0, sizeof(root->root_key)); memset(&root->root_item, 0, sizeof(root->root_item)); @@ -1275,12 +1274,13 @@ static struct btrfs_root *alloc_log_tree(struct btrfs_trans_handle *trans, root->root_key.offset = BTRFS_TREE_LOG_OBJECTID; /* - * DON'T set REF_COWS for log trees + * DON'T set SHAREABLE bit for log trees. * - * log trees do not get reference counted because they go away - * before a real commit is actually done. They do store pointers - * to file data extents, and those reference counts still get - * updated (along with back refs to the log tree). + * Log trees are not exposed to user space thus can't be snapshotted, + * and they go away before a real commit is actually done. + * + * They do store pointers to file data extents, and those reference + * counts still get updated (along with back refs to the log tree). */ leaf = btrfs_alloc_tree_block(trans, root, 0, BTRFS_TREE_LOG_OBJECTID, @@ -1418,8 +1418,9 @@ static int btrfs_init_fs_root(struct btrfs_root *root) if (ret) goto fail; - if (root->root_key.objectid != BTRFS_TREE_LOG_OBJECTID) { - set_bit(BTRFS_ROOT_REF_COWS, &root->state); + if (root->root_key.objectid != BTRFS_TREE_LOG_OBJECTID && + root->root_key.objectid != BTRFS_DATA_RELOC_TREE_OBJECTID) { + set_bit(BTRFS_ROOT_SHAREABLE, &root->state); btrfs_check_and_init_root_item(&root->root_item); } @@ -1524,6 +1525,7 @@ void btrfs_free_fs_info(struct btrfs_fs_info *fs_info) btrfs_put_root(fs_info->uuid_root); btrfs_put_root(fs_info->free_space_root); btrfs_put_root(fs_info->fs_root); + btrfs_put_root(fs_info->data_reloc_root); btrfs_check_leaked_roots(fs_info); btrfs_extent_buffer_leak_debug_check(fs_info); kfree(fs_info->super_copy); @@ -1533,35 +1535,34 @@ void btrfs_free_fs_info(struct btrfs_fs_info *fs_info) struct btrfs_root *btrfs_get_fs_root(struct btrfs_fs_info *fs_info, - struct btrfs_key *location, - bool check_ref) + u64 objectid, bool check_ref) { struct btrfs_root *root; struct btrfs_path *path; struct btrfs_key key; int ret; - if (location->objectid == BTRFS_ROOT_TREE_OBJECTID) + if (objectid == BTRFS_ROOT_TREE_OBJECTID) return btrfs_grab_root(fs_info->tree_root); - if (location->objectid == BTRFS_EXTENT_TREE_OBJECTID) + if (objectid == BTRFS_EXTENT_TREE_OBJECTID) return btrfs_grab_root(fs_info->extent_root); - if (location->objectid == BTRFS_CHUNK_TREE_OBJECTID) + if (objectid == BTRFS_CHUNK_TREE_OBJECTID) return btrfs_grab_root(fs_info->chunk_root); - if (location->objectid == BTRFS_DEV_TREE_OBJECTID) + if (objectid == BTRFS_DEV_TREE_OBJECTID) return btrfs_grab_root(fs_info->dev_root); - if (location->objectid == BTRFS_CSUM_TREE_OBJECTID) + if (objectid == BTRFS_CSUM_TREE_OBJECTID) return btrfs_grab_root(fs_info->csum_root); - if (location->objectid == BTRFS_QUOTA_TREE_OBJECTID) + if (objectid == BTRFS_QUOTA_TREE_OBJECTID) return btrfs_grab_root(fs_info->quota_root) ? fs_info->quota_root : ERR_PTR(-ENOENT); - if (location->objectid == BTRFS_UUID_TREE_OBJECTID) + if (objectid == BTRFS_UUID_TREE_OBJECTID) return btrfs_grab_root(fs_info->uuid_root) ? fs_info->uuid_root : ERR_PTR(-ENOENT); - if (location->objectid == BTRFS_FREE_SPACE_TREE_OBJECTID) + if (objectid == BTRFS_FREE_SPACE_TREE_OBJECTID) return btrfs_grab_root(fs_info->free_space_root) ? fs_info->free_space_root : ERR_PTR(-ENOENT); again: - root = btrfs_lookup_fs_root(fs_info, location->objectid); + root = btrfs_lookup_fs_root(fs_info, objectid); if (root) { if (check_ref && btrfs_root_refs(&root->root_item) == 0) { btrfs_put_root(root); @@ -1570,7 +1571,10 @@ again: return root; } - root = btrfs_read_tree_root(fs_info->tree_root, location); + key.objectid = objectid; + key.type = BTRFS_ROOT_ITEM_KEY; + key.offset = (u64)-1; + root = btrfs_read_tree_root(fs_info->tree_root, &key); if (IS_ERR(root)) return root; @@ -1590,7 +1594,7 @@ again: } key.objectid = BTRFS_ORPHAN_OBJECTID; key.type = BTRFS_ORPHAN_ITEM_KEY; - key.offset = location->objectid; + key.offset = objectid; ret = btrfs_search_slot(NULL, fs_info->tree_root, &key, path, 0, 0); btrfs_free_path(path); @@ -1940,7 +1944,6 @@ static void btrfs_stop_all_workers(struct btrfs_fs_info *fs_info) btrfs_destroy_workqueue(fs_info->workers); btrfs_destroy_workqueue(fs_info->endio_workers); btrfs_destroy_workqueue(fs_info->endio_raid56_workers); - btrfs_destroy_workqueue(fs_info->endio_repair_workers); btrfs_destroy_workqueue(fs_info->rmw_workers); btrfs_destroy_workqueue(fs_info->endio_write_workers); btrfs_destroy_workqueue(fs_info->endio_freespace_worker); @@ -1981,6 +1984,7 @@ static void free_root_pointers(struct btrfs_fs_info *info, bool free_chunk_root) free_root_extent_buffers(info->quota_root); free_root_extent_buffers(info->uuid_root); free_root_extent_buffers(info->fs_root); + free_root_extent_buffers(info->data_reloc_root); if (free_chunk_root) free_root_extent_buffers(info->chunk_root); free_root_extent_buffers(info->free_space_root); @@ -1993,6 +1997,7 @@ void btrfs_put_root(struct btrfs_root *root) if (refcount_dec_and_test(&root->refs)) { WARN_ON(!RB_EMPTY_ROOT(&root->inode_tree)); + WARN_ON(test_bit(BTRFS_ROOT_DEAD_RELOC_TREE, &root->state)); if (root->anon_dev) free_anon_bdev(root->anon_dev); btrfs_drew_lock_destroy(&root->snapshot_lock); @@ -2143,8 +2148,6 @@ static int btrfs_init_workqueues(struct btrfs_fs_info *fs_info, fs_info->endio_raid56_workers = btrfs_alloc_workqueue(fs_info, "endio-raid56", flags, max_active, 4); - fs_info->endio_repair_workers = - btrfs_alloc_workqueue(fs_info, "endio-repair", flags, 1, 0); fs_info->rmw_workers = btrfs_alloc_workqueue(fs_info, "rmw", flags, max_active, 2); fs_info->endio_write_workers = @@ -2168,7 +2171,6 @@ static int btrfs_init_workqueues(struct btrfs_fs_info *fs_info, fs_info->flush_workers && fs_info->endio_workers && fs_info->endio_meta_workers && fs_info->endio_meta_write_workers && - fs_info->endio_repair_workers && fs_info->endio_write_workers && fs_info->endio_raid56_workers && fs_info->endio_freespace_worker && fs_info->rmw_workers && fs_info->caching_workers && fs_info->readahead_workers && @@ -2290,6 +2292,19 @@ static int btrfs_read_roots(struct btrfs_fs_info *fs_info) set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state); fs_info->csum_root = root; + /* + * This tree can share blocks with some other fs tree during relocation + * and we need a proper setup by btrfs_get_fs_root + */ + root = btrfs_get_fs_root(tree_root->fs_info, + BTRFS_DATA_RELOC_TREE_OBJECTID, true); + if (IS_ERR(root)) { + ret = PTR_ERR(root); + goto out; + } + set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state); + fs_info->data_reloc_root = root; + location.objectid = BTRFS_QUOTA_TREE_OBJECTID; root = btrfs_read_tree_root(tree_root, &location); if (!IS_ERR(root)) { @@ -2827,7 +2842,6 @@ int __cold open_ctree(struct super_block *sb, struct btrfs_fs_devices *fs_device u64 generation; u64 features; u16 csum_type; - struct btrfs_key location; struct btrfs_super_block *disk_super; struct btrfs_fs_info *fs_info = btrfs_sb(sb); struct btrfs_root *tree_root; @@ -3241,11 +3255,7 @@ int __cold open_ctree(struct super_block *sb, struct btrfs_fs_devices *fs_device } } - location.objectid = BTRFS_FS_TREE_OBJECTID; - location.type = BTRFS_ROOT_ITEM_KEY; - location.offset = 0; - - fs_info->fs_root = btrfs_get_fs_root(fs_info, &location, true); + fs_info->fs_root = btrfs_get_fs_root(fs_info, BTRFS_FS_TREE_OBJECTID, true); if (IS_ERR(fs_info->fs_root)) { err = PTR_ERR(fs_info->fs_root); btrfs_warn(fs_info, "failed to read fs tree: %d", err); @@ -3508,10 +3518,9 @@ static int write_dev_supers(struct btrfs_device *device, btrfs_set_super_bytenr(sb, bytenr); - crypto_shash_init(shash); - crypto_shash_update(shash, (const char *)sb + BTRFS_CSUM_SIZE, - BTRFS_SUPER_INFO_SIZE - BTRFS_CSUM_SIZE); - crypto_shash_final(shash, sb->csum); + crypto_shash_digest(shash, (const char *)sb + BTRFS_CSUM_SIZE, + BTRFS_SUPER_INFO_SIZE - BTRFS_CSUM_SIZE, + sb->csum); page = find_or_create_page(mapping, bytenr >> PAGE_SHIFT, GFP_NOFS); |