83 	struct btrfs_root *root, *tmp;  in switch_commit_roots()  local
86 	list_for_each_entry_safe(root, tmp, &trans->switch_commits,  in switch_commit_roots()
88 		list_del_init(&root->dirty_list);  in switch_commit_roots()
89 		free_extent_buffer(root->commit_root);  in switch_commit_roots()
90 		root->commit_root = btrfs_root_node(root);  in switch_commit_roots()
91 		if (is_fstree(root->root_key.objectid))  in switch_commit_roots()
92 			btrfs_unpin_free_ino(root);  in switch_commit_roots()
93 		extent_io_tree_release(&root->dirty_log_pages);  in switch_commit_roots()
94 		btrfs_qgroup_clean_swapped_blocks(root);  in switch_commit_roots()
100 		root = list_first_entry(&trans->dropped_roots,  in switch_commit_roots()
102 		list_del_init(&root->root_list);  in switch_commit_roots()
104 		btrfs_drop_and_free_fs_root(fs_info, root);  in switch_commit_roots()
281 			       struct btrfs_root *root,  in record_root_in_trans()  argument
284 	struct btrfs_fs_info *fs_info = root->fs_info;  in record_root_in_trans()
286 	if ((test_bit(BTRFS_ROOT_REF_COWS, &root->state) &&  in record_root_in_trans()
287 	    root->last_trans < trans->transid) || force) {  in record_root_in_trans()
288 		WARN_ON(root == fs_info->extent_root);  in record_root_in_trans()
289 		WARN_ON(!force && root->commit_root != root->node);  in record_root_in_trans()
296 		set_bit(BTRFS_ROOT_IN_TRANS_SETUP, &root->state);  in record_root_in_trans()
304 		if (root->last_trans == trans->transid && !force) {  in record_root_in_trans()
309 				   (unsigned long)root->root_key.objectid,  in record_root_in_trans()
312 		root->last_trans = trans->transid;  in record_root_in_trans()
333 		btrfs_init_reloc_root(trans, root);  in record_root_in_trans()
335 		clear_bit(BTRFS_ROOT_IN_TRANS_SETUP, &root->state);  in record_root_in_trans()
342 			    struct btrfs_root *root)  in btrfs_add_dropped_root()  argument
344 	struct btrfs_fs_info *fs_info = root->fs_info;  in btrfs_add_dropped_root()
349 	list_add_tail(&root->root_list, &cur_trans->dropped_roots);  in btrfs_add_dropped_root()
355 			     (unsigned long)root->root_key.objectid,  in btrfs_add_dropped_root()
361 			       struct btrfs_root *root)  in btrfs_record_root_in_trans()  argument
363 	struct btrfs_fs_info *fs_info = root->fs_info;  in btrfs_record_root_in_trans()
365 	if (!test_bit(BTRFS_ROOT_REF_COWS, &root->state))  in btrfs_record_root_in_trans()
373 	if (root->last_trans == trans->transid &&  in btrfs_record_root_in_trans()
374 	    !test_bit(BTRFS_ROOT_IN_TRANS_SETUP, &root->state))  in btrfs_record_root_in_trans()
378 	record_root_in_trans(trans, root, 0);  in btrfs_record_root_in_trans()
425 static inline bool need_reserve_reloc_root(struct btrfs_root *root)  in need_reserve_reloc_root()  argument
427 	struct btrfs_fs_info *fs_info = root->fs_info;  in need_reserve_reloc_root()
430 	    !test_bit(BTRFS_ROOT_REF_COWS, &root->state) ||  in need_reserve_reloc_root()
431 	    root->root_key.objectid == BTRFS_TREE_RELOC_OBJECTID ||  in need_reserve_reloc_root()
432 	    root->reloc_root)  in need_reserve_reloc_root()
439 start_transaction(struct btrfs_root *root, unsigned int num_items,  in start_transaction()  argument
443 	struct btrfs_fs_info *fs_info = root->fs_info;  in start_transaction()
472 	if (num_items && root != fs_info->chunk_root) {  in start_transaction()
477 		ret = btrfs_qgroup_reserve_meta_pertrans(root, qgroup_reserved,  in start_transaction()
498 		if (need_reserve_reloc_root(root)) {  in start_transaction()
503 		ret = btrfs_block_rsv_add(root, rsv, num_bytes, flush);  in start_transaction()
564 	h->root = root;  in start_transaction()
566 	h->fs_info = root->fs_info;  in start_transaction()
589 	btrfs_record_root_in_trans(h, root);  in start_transaction()
604 	btrfs_qgroup_free_meta_pertrans(root, qgroup_reserved);  in start_transaction()
608 struct btrfs_trans_handle *btrfs_start_transaction(struct btrfs_root *root,  in btrfs_start_transaction()  argument
611 	return start_transaction(root, num_items, TRANS_START,  in btrfs_start_transaction()
616 					struct btrfs_root *root,  in btrfs_start_transaction_fallback_global_rsv()  argument
620 	struct btrfs_fs_info *fs_info = root->fs_info;  in btrfs_start_transaction_fallback_global_rsv()
631 	trans = start_transaction(root, num_items, TRANS_START,  in btrfs_start_transaction_fallback_global_rsv()
636 	trans = btrfs_start_transaction(root, 0);  in btrfs_start_transaction_fallback_global_rsv()
656 struct btrfs_trans_handle *btrfs_join_transaction(struct btrfs_root *root)  in btrfs_join_transaction()  argument
658 	return start_transaction(root, 0, TRANS_JOIN, BTRFS_RESERVE_NO_FLUSH,  in btrfs_join_transaction()
662 struct btrfs_trans_handle *btrfs_join_transaction_nolock(struct btrfs_root *root)  in btrfs_join_transaction_nolock()  argument
664 	return start_transaction(root, 0, TRANS_JOIN_NOLOCK,  in btrfs_join_transaction_nolock()
672 struct btrfs_trans_handle *btrfs_join_transaction_nostart(struct btrfs_root *root)  in btrfs_join_transaction_nostart()  argument
674 	return start_transaction(root, 0, TRANS_JOIN_NOSTART,  in btrfs_join_transaction_nostart()
691 struct btrfs_trans_handle *btrfs_attach_transaction(struct btrfs_root *root)  in btrfs_attach_transaction()  argument
693 	return start_transaction(root, 0, TRANS_ATTACH,  in btrfs_attach_transaction()
705 btrfs_attach_transaction_barrier(struct btrfs_root *root)  in btrfs_attach_transaction_barrier()  argument
709 	trans = start_transaction(root, 0, TRANS_ATTACH,  in btrfs_attach_transaction_barrier()
712 		btrfs_wait_for_commit(root->fs_info, 0);  in btrfs_attach_transaction_barrier()
1072 			       struct btrfs_root *root)  in update_cowonly_root()  argument
1077 	struct btrfs_fs_info *fs_info = root->fs_info;  in update_cowonly_root()
1080 	old_root_used = btrfs_root_used(&root->root_item);  in update_cowonly_root()
1083 		old_root_bytenr = btrfs_root_bytenr(&root->root_item);  in update_cowonly_root()
1084 		if (old_root_bytenr == root->node->start &&  in update_cowonly_root()
1085 		    old_root_used == btrfs_root_used(&root->root_item))  in update_cowonly_root()
1088 		btrfs_set_root_node(&root->root_item, root->node);  in update_cowonly_root()
1090 					&root->root_key,  in update_cowonly_root()
1091 					&root->root_item);  in update_cowonly_root()
1095 		old_root_used = btrfs_root_used(&root->root_item);  in update_cowonly_root()
1150 		struct btrfs_root *root;  in commit_cowonly_roots()  local
1153 		root = list_entry(next, struct btrfs_root, dirty_list);  in commit_cowonly_roots()
1154 		clear_bit(BTRFS_ROOT_DIRTY, &root->state);  in commit_cowonly_roots()
1156 		if (root != fs_info->extent_root)  in commit_cowonly_roots()
1157 			list_add_tail(&root->dirty_list,  in commit_cowonly_roots()
1159 		ret = update_cowonly_root(trans, root);  in commit_cowonly_roots()
1194 void btrfs_add_dead_root(struct btrfs_root *root)  in btrfs_add_dead_root()  argument
1196 	struct btrfs_fs_info *fs_info = root->fs_info;  in btrfs_add_dead_root()
1199 	if (list_empty(&root->root_list))  in btrfs_add_dead_root()
1200 		list_add_tail(&root->root_list, &fs_info->dead_roots);  in btrfs_add_dead_root()
1224 			struct btrfs_root *root = gang[i];  in commit_fs_roots()  local
1226 					(unsigned long)root->root_key.objectid,  in commit_fs_roots()
1230 			btrfs_free_log(trans, root);  in commit_fs_roots()
1231 			btrfs_update_reloc_root(trans, root);  in commit_fs_roots()
1233 			btrfs_save_ino_cache(root, trans);  in commit_fs_roots()
1236 			clear_bit(BTRFS_ROOT_FORCE_COW, &root->state);  in commit_fs_roots()
1239 			if (root->commit_root != root->node) {  in commit_fs_roots()
1240 				list_add_tail(&root->dirty_list,  in commit_fs_roots()
1242 				btrfs_set_root_node(&root->root_item,  in commit_fs_roots()
1243 						    root->node);  in commit_fs_roots()
1247 						&root->root_key,  in commit_fs_roots()
1248 						&root->root_item);  in commit_fs_roots()
1252 			btrfs_qgroup_free_meta_all_pertrans(root);  in commit_fs_roots()
1263 int btrfs_defrag_root(struct btrfs_root *root)  in btrfs_defrag_root()  argument
1265 	struct btrfs_fs_info *info = root->fs_info;  in btrfs_defrag_root()
1269 	if (test_and_set_bit(BTRFS_ROOT_DEFRAG_RUNNING, &root->state))  in btrfs_defrag_root()
1273 		trans = btrfs_start_transaction(root, 0);  in btrfs_defrag_root()
1277 		ret = btrfs_defrag_leaves(trans, root);  in btrfs_defrag_root()
1292 	clear_bit(BTRFS_ROOT_DEFRAG_RUNNING, &root->state);  in btrfs_defrag_root()
1399 	struct btrfs_root *root = pending->root;  in create_pending_snapshot()  local
1435 		pending->error = btrfs_block_rsv_add(root,  in create_pending_snapshot()
1455 	parent_root = BTRFS_I(parent_inode)->root;  in create_pending_snapshot()
1493 	record_root_in_trans(trans, root, 0);  in create_pending_snapshot()
1494 	btrfs_set_root_last_snapshot(&root->root_item, trans->transid);  in create_pending_snapshot()
1495 	memcpy(new_root_item, &root->root_item, sizeof(*new_root_item));  in create_pending_snapshot()
1509 	memcpy(new_root_item->parent_uuid, root->root_item.uuid,  in create_pending_snapshot()
1523 	old = btrfs_lock_root_node(root);  in create_pending_snapshot()
1524 	ret = btrfs_cow_block(trans, root, old, NULL, 0, &old);  in create_pending_snapshot()
1534 	ret = btrfs_copy_root(trans, root, old, &tmp, objectid);  in create_pending_snapshot()
1543 	set_bit(BTRFS_ROOT_FORCE_COW, &root->state);  in create_pending_snapshot()
1595 	ret = qgroup_account_snapshot(trans, root, parent_root,  in create_pending_snapshot()
1688 	super->root = root_item->bytenr;  in update_super_roots()
1785 	ac->newtrans = btrfs_join_transaction(trans->root);  in btrfs_commit_transaction_async()
1862 	trace_btrfs_transaction_commit(trans->root);  in cleanup_transaction()
1915 			ret = btrfs_start_delalloc_snapshot(pending->root);  in btrfs_start_delalloc_flush()
1940 			btrfs_wait_ordered_extents(pending->root,  in btrfs_wait_delalloc_flush()
2307 	trace_btrfs_transaction_commit(trans->root);  in btrfs_commit_transaction()
2343 int btrfs_clean_one_deleted_snapshot(struct btrfs_root *root)  in btrfs_clean_one_deleted_snapshot()  argument
2346 	struct btrfs_fs_info *fs_info = root->fs_info;  in btrfs_clean_one_deleted_snapshot()
2353 	root = list_first_entry(&fs_info->dead_roots,  in btrfs_clean_one_deleted_snapshot()
2355 	list_del_init(&root->root_list);  in btrfs_clean_one_deleted_snapshot()
2358 	btrfs_debug(fs_info, "cleaner removing %llu", root->root_key.objectid);  in btrfs_clean_one_deleted_snapshot()
2360 	btrfs_kill_all_delayed_nodes(root);  in btrfs_clean_one_deleted_snapshot()
2362 	if (btrfs_header_backref_rev(root->node) <  in btrfs_clean_one_deleted_snapshot()
2364 		ret = btrfs_drop_snapshot(root, NULL, 0, 0);  in btrfs_clean_one_deleted_snapshot()
2366 		ret = btrfs_drop_snapshot(root, NULL, 1, 0);  in btrfs_clean_one_deleted_snapshot()