114 	struct btrfs_root *root, *tmp;  in switch_commit_roots()  local
117 	list_for_each_entry_safe(root, tmp, &trans->switch_commits,  in switch_commit_roots()
119 		list_del_init(&root->dirty_list);  in switch_commit_roots()
120 		free_extent_buffer(root->commit_root);  in switch_commit_roots()
121 		root->commit_root = btrfs_root_node(root);  in switch_commit_roots()
122 		if (is_fstree(root->objectid))  in switch_commit_roots()
123 			btrfs_unpin_free_ino(root);  in switch_commit_roots()
124 		clear_btree_io_tree(&root->dirty_log_pages);  in switch_commit_roots()
130 		root = list_first_entry(&trans->dropped_roots,  in switch_commit_roots()
132 		list_del_init(&root->root_list);  in switch_commit_roots()
134 		btrfs_drop_and_free_fs_root(fs_info, root);  in switch_commit_roots()
169 static noinline int join_transaction(struct btrfs_root *root, unsigned int type)  in join_transaction()  argument
172 	struct btrfs_fs_info *fs_info = root->fs_info;  in join_transaction()
297 			       struct btrfs_root *root)  in record_root_in_trans()  argument
299 	if (test_bit(BTRFS_ROOT_REF_COWS, &root->state) &&  in record_root_in_trans()
300 	    root->last_trans < trans->transid) {  in record_root_in_trans()
301 		WARN_ON(root == root->fs_info->extent_root);  in record_root_in_trans()
302 		WARN_ON(root->commit_root != root->node);  in record_root_in_trans()
309 		set_bit(BTRFS_ROOT_IN_TRANS_SETUP, &root->state);  in record_root_in_trans()
316 		spin_lock(&root->fs_info->fs_roots_radix_lock);  in record_root_in_trans()
317 		if (root->last_trans == trans->transid) {  in record_root_in_trans()
318 			spin_unlock(&root->fs_info->fs_roots_radix_lock);  in record_root_in_trans()
321 		radix_tree_tag_set(&root->fs_info->fs_roots_radix,  in record_root_in_trans()
322 			   (unsigned long)root->root_key.objectid,  in record_root_in_trans()
324 		spin_unlock(&root->fs_info->fs_roots_radix_lock);  in record_root_in_trans()
325 		root->last_trans = trans->transid;  in record_root_in_trans()
346 		btrfs_init_reloc_root(trans, root);  in record_root_in_trans()
348 		clear_bit(BTRFS_ROOT_IN_TRANS_SETUP, &root->state);  in record_root_in_trans()
355 			    struct btrfs_root *root)  in btrfs_add_dropped_root()  argument
361 	list_add_tail(&root->root_list, &cur_trans->dropped_roots);  in btrfs_add_dropped_root()
365 	spin_lock(&root->fs_info->fs_roots_radix_lock);  in btrfs_add_dropped_root()
366 	radix_tree_tag_clear(&root->fs_info->fs_roots_radix,  in btrfs_add_dropped_root()
367 			     (unsigned long)root->root_key.objectid,  in btrfs_add_dropped_root()
369 	spin_unlock(&root->fs_info->fs_roots_radix_lock);  in btrfs_add_dropped_root()
373 			       struct btrfs_root *root)  in btrfs_record_root_in_trans()  argument
375 	if (!test_bit(BTRFS_ROOT_REF_COWS, &root->state))  in btrfs_record_root_in_trans()
383 	if (root->last_trans == trans->transid &&  in btrfs_record_root_in_trans()
384 	    !test_bit(BTRFS_ROOT_IN_TRANS_SETUP, &root->state))  in btrfs_record_root_in_trans()
387 	mutex_lock(&root->fs_info->reloc_mutex);  in btrfs_record_root_in_trans()
388 	record_root_in_trans(trans, root);  in btrfs_record_root_in_trans()
389 	mutex_unlock(&root->fs_info->reloc_mutex);  in btrfs_record_root_in_trans()
405 static void wait_current_trans(struct btrfs_root *root)  in wait_current_trans()  argument
409 	spin_lock(&root->fs_info->trans_lock);  in wait_current_trans()
410 	cur_trans = root->fs_info->running_transaction;  in wait_current_trans()
413 		spin_unlock(&root->fs_info->trans_lock);  in wait_current_trans()
415 		wait_event(root->fs_info->transaction_wait,  in wait_current_trans()
420 		spin_unlock(&root->fs_info->trans_lock);  in wait_current_trans()
424 static int may_wait_transaction(struct btrfs_root *root, int type)  in may_wait_transaction()  argument
426 	if (root->fs_info->log_root_recovering)  in may_wait_transaction()
433 	    !atomic_read(&root->fs_info->open_ioctl_trans))  in may_wait_transaction()
439 static inline bool need_reserve_reloc_root(struct btrfs_root *root)  in need_reserve_reloc_root()  argument
441 	if (!root->fs_info->reloc_ctl ||  in need_reserve_reloc_root()
442 	    !test_bit(BTRFS_ROOT_REF_COWS, &root->state) ||  in need_reserve_reloc_root()
443 	    root->root_key.objectid == BTRFS_TREE_RELOC_OBJECTID ||  in need_reserve_reloc_root()
444 	    root->reloc_root)  in need_reserve_reloc_root()
451 start_transaction(struct btrfs_root *root, unsigned int num_items,  in start_transaction()  argument
464 	if (test_bit(BTRFS_FS_STATE_ERROR, &root->fs_info->fs_state))  in start_transaction()
481 	if (num_items > 0 && root != root->fs_info->chunk_root) {  in start_transaction()
482 		qgroup_reserved = num_items * root->nodesize;  in start_transaction()
483 		ret = btrfs_qgroup_reserve_meta(root, qgroup_reserved);  in start_transaction()
487 		num_bytes = btrfs_calc_trans_metadata_size(root, num_items);  in start_transaction()
491 		if (need_reserve_reloc_root(root)) {  in start_transaction()
492 			num_bytes += root->nodesize;  in start_transaction()
496 		ret = btrfs_block_rsv_add(root,  in start_transaction()
497 					  &root->fs_info->trans_block_rsv,  in start_transaction()
520 		sb_start_intwrite(root->fs_info->sb);  in start_transaction()
522 	if (may_wait_transaction(root, type))  in start_transaction()
523 		wait_current_trans(root);  in start_transaction()
526 		ret = join_transaction(root, type);  in start_transaction()
528 			wait_current_trans(root);  in start_transaction()
540 	cur_trans = root->fs_info->running_transaction;  in start_transaction()
544 	h->root = root;  in start_transaction()
554 	    may_wait_transaction(root, type)) {  in start_transaction()
556 		btrfs_commit_transaction(h, root);  in start_transaction()
561 		trace_btrfs_space_reservation(root->fs_info, "transaction",  in start_transaction()
563 		h->block_rsv = &root->fs_info->trans_block_rsv;  in start_transaction()
569 	btrfs_record_root_in_trans(h, root);  in start_transaction()
577 		sb_end_intwrite(root->fs_info->sb);  in start_transaction()
581 		btrfs_block_rsv_release(root, &root->fs_info->trans_block_rsv,  in start_transaction()
584 	btrfs_qgroup_free_meta(root, qgroup_reserved);  in start_transaction()
588 struct btrfs_trans_handle *btrfs_start_transaction(struct btrfs_root *root,  in btrfs_start_transaction()  argument
591 	return start_transaction(root, num_items, TRANS_START,  in btrfs_start_transaction()
595 					struct btrfs_root *root,  in btrfs_start_transaction_fallback_global_rsv()  argument
603 	trans = btrfs_start_transaction(root, num_items);  in btrfs_start_transaction_fallback_global_rsv()
607 	trans = btrfs_start_transaction(root, 0);  in btrfs_start_transaction_fallback_global_rsv()
611 	num_bytes = btrfs_calc_trans_metadata_size(root, num_items);  in btrfs_start_transaction_fallback_global_rsv()
612 	ret = btrfs_cond_migrate_bytes(root->fs_info,  in btrfs_start_transaction_fallback_global_rsv()
613 				       &root->fs_info->trans_block_rsv,  in btrfs_start_transaction_fallback_global_rsv()
617 		btrfs_end_transaction(trans, root);  in btrfs_start_transaction_fallback_global_rsv()
621 	trans->block_rsv = &root->fs_info->trans_block_rsv;  in btrfs_start_transaction_fallback_global_rsv()
628 					struct btrfs_root *root,  in btrfs_start_transaction_lflush()  argument
631 	return start_transaction(root, num_items, TRANS_START,  in btrfs_start_transaction_lflush()
635 struct btrfs_trans_handle *btrfs_join_transaction(struct btrfs_root *root)  in btrfs_join_transaction()  argument
637 	return start_transaction(root, 0, TRANS_JOIN, 0);  in btrfs_join_transaction()
640 struct btrfs_trans_handle *btrfs_join_transaction_nolock(struct btrfs_root *root)  in btrfs_join_transaction_nolock()  argument
642 	return start_transaction(root, 0, TRANS_JOIN_NOLOCK, 0);  in btrfs_join_transaction_nolock()
645 struct btrfs_trans_handle *btrfs_start_ioctl_transaction(struct btrfs_root *root)  in btrfs_start_ioctl_transaction()  argument
647 	return start_transaction(root, 0, TRANS_USERSPACE, 0);  in btrfs_start_ioctl_transaction()
663 struct btrfs_trans_handle *btrfs_attach_transaction(struct btrfs_root *root)  in btrfs_attach_transaction()  argument
665 	return start_transaction(root, 0, TRANS_ATTACH, 0);  in btrfs_attach_transaction()
676 btrfs_attach_transaction_barrier(struct btrfs_root *root)  in btrfs_attach_transaction_barrier()  argument
680 	trans = start_transaction(root, 0, TRANS_ATTACH, 0);  in btrfs_attach_transaction_barrier()
682 		btrfs_wait_for_commit(root, 0);  in btrfs_attach_transaction_barrier()
688 static noinline void wait_for_commit(struct btrfs_root *root,  in wait_for_commit()  argument
694 int btrfs_wait_for_commit(struct btrfs_root *root, u64 transid)  in btrfs_wait_for_commit()  argument
700 		if (transid <= root->fs_info->last_trans_committed)  in btrfs_wait_for_commit()
704 		spin_lock(&root->fs_info->trans_lock);  in btrfs_wait_for_commit()
705 		list_for_each_entry(t, &root->fs_info->trans_list, list) {  in btrfs_wait_for_commit()
717 		spin_unlock(&root->fs_info->trans_lock);  in btrfs_wait_for_commit()
724 			if (transid > root->fs_info->last_trans_committed)  in btrfs_wait_for_commit()
730 		spin_lock(&root->fs_info->trans_lock);  in btrfs_wait_for_commit()
731 		list_for_each_entry_reverse(t, &root->fs_info->trans_list,  in btrfs_wait_for_commit()
741 		spin_unlock(&root->fs_info->trans_lock);  in btrfs_wait_for_commit()
746 	wait_for_commit(root, cur_trans);  in btrfs_wait_for_commit()
752 void btrfs_throttle(struct btrfs_root *root)  in btrfs_throttle()  argument
754 	if (!atomic_read(&root->fs_info->open_ioctl_trans))  in btrfs_throttle()
755 		wait_current_trans(root);  in btrfs_throttle()
759 				  struct btrfs_root *root)  in should_end_transaction()  argument
761 	if (root->fs_info->global_block_rsv.space_info->full &&  in should_end_transaction()
762 	    btrfs_check_space_for_delayed_refs(trans, root))  in should_end_transaction()
765 	return !!btrfs_block_rsv_check(root, &root->fs_info->global_block_rsv, 5);  in should_end_transaction()
769 				 struct btrfs_root *root)  in btrfs_should_end_transaction()  argument
783 		err = btrfs_run_delayed_refs(trans, root, updates * 2);  in btrfs_should_end_transaction()
788 	return should_end_transaction(trans, root);  in btrfs_should_end_transaction()
792 			  struct btrfs_root *root, int throttle)  in __btrfs_end_transaction()  argument
795 	struct btrfs_fs_info *info = root->fs_info;  in __btrfs_end_transaction()
807 	btrfs_trans_release_metadata(trans, root);  in __btrfs_end_transaction()
811 		btrfs_create_pending_block_groups(trans, root);  in __btrfs_end_transaction()
816 			btrfs_should_throttle_delayed_refs(trans, root);  in __btrfs_end_transaction()
828 	btrfs_trans_release_metadata(trans, root);  in __btrfs_end_transaction()
832 		btrfs_create_pending_block_groups(trans, root);  in __btrfs_end_transaction()
836 	if (lock && !atomic_read(&root->fs_info->open_ioctl_trans) &&  in __btrfs_end_transaction()
837 	    should_end_transaction(trans, root) &&  in __btrfs_end_transaction()
847 			return btrfs_commit_transaction(trans, root);  in __btrfs_end_transaction()
853 		sb_end_intwrite(root->fs_info->sb);  in __btrfs_end_transaction()
872 		btrfs_run_delayed_iputs(root);  in __btrfs_end_transaction()
875 	    test_bit(BTRFS_FS_STATE_ERROR, &root->fs_info->fs_state)) {  in __btrfs_end_transaction()
883 		btrfs_async_run_delayed_refs(root, cur,  in __btrfs_end_transaction()
890 			  struct btrfs_root *root)  in btrfs_end_transaction()  argument
892 	return __btrfs_end_transaction(trans, root, 0);  in btrfs_end_transaction()
896 				   struct btrfs_root *root)  in btrfs_end_transaction_throttle()  argument
898 	return __btrfs_end_transaction(trans, root, 1);  in btrfs_end_transaction_throttle()
906 int btrfs_write_marked_extents(struct btrfs_root *root,  in btrfs_write_marked_extents()  argument
911 	struct address_space *mapping = root->fs_info->btree_inode->i_mapping;  in btrfs_write_marked_extents()
960 int btrfs_wait_marked_extents(struct btrfs_root *root,  in btrfs_wait_marked_extents()  argument
965 	struct address_space *mapping = root->fs_info->btree_inode->i_mapping;  in btrfs_wait_marked_extents()
969 	struct btrfs_inode *btree_ino = BTRFS_I(root->fs_info->btree_inode);  in btrfs_wait_marked_extents()
999 	if (root->root_key.objectid == BTRFS_TREE_LOG_OBJECTID) {  in btrfs_wait_marked_extents()
1026 static int btrfs_write_and_wait_marked_extents(struct btrfs_root *root,  in btrfs_write_and_wait_marked_extents()  argument
1034 	ret = btrfs_write_marked_extents(root, dirty_pages, mark);  in btrfs_write_and_wait_marked_extents()
1036 	ret2 = btrfs_wait_marked_extents(root, dirty_pages, mark);  in btrfs_write_and_wait_marked_extents()
1046 				     struct btrfs_root *root)  in btrfs_write_and_wait_transaction()  argument
1050 	ret = btrfs_write_and_wait_marked_extents(root,  in btrfs_write_and_wait_transaction()
1069 			       struct btrfs_root *root)  in update_cowonly_root()  argument
1074 	struct btrfs_root *tree_root = root->fs_info->tree_root;  in update_cowonly_root()
1076 	old_root_used = btrfs_root_used(&root->root_item);  in update_cowonly_root()
1079 		old_root_bytenr = btrfs_root_bytenr(&root->root_item);  in update_cowonly_root()
1080 		if (old_root_bytenr == root->node->start &&  in update_cowonly_root()
1081 		    old_root_used == btrfs_root_used(&root->root_item))  in update_cowonly_root()
1084 		btrfs_set_root_node(&root->root_item, root->node);  in update_cowonly_root()
1086 					&root->root_key,  in update_cowonly_root()
1087 					&root->root_item);  in update_cowonly_root()
1091 		old_root_used = btrfs_root_used(&root->root_item);  in update_cowonly_root()
1105 					 struct btrfs_root *root)  in commit_cowonly_roots()  argument
1107 	struct btrfs_fs_info *fs_info = root->fs_info;  in commit_cowonly_roots()
1123 	ret = btrfs_run_delayed_refs(trans, root, (unsigned long)-1);  in commit_cowonly_roots()
1127 	ret = btrfs_run_dev_stats(trans, root->fs_info);  in commit_cowonly_roots()
1130 	ret = btrfs_run_dev_replace(trans, root->fs_info);  in commit_cowonly_roots()
1133 	ret = btrfs_run_qgroups(trans, root->fs_info);  in commit_cowonly_roots()
1137 	ret = btrfs_setup_space_cache(trans, root);  in commit_cowonly_roots()
1142 	ret = btrfs_run_delayed_refs(trans, root, (unsigned long)-1);  in commit_cowonly_roots()
1149 		root = list_entry(next, struct btrfs_root, dirty_list);  in commit_cowonly_roots()
1150 		clear_bit(BTRFS_ROOT_DIRTY, &root->state);  in commit_cowonly_roots()
1152 		if (root != fs_info->extent_root)  in commit_cowonly_roots()
1153 			list_add_tail(&root->dirty_list,  in commit_cowonly_roots()
1155 		ret = update_cowonly_root(trans, root);  in commit_cowonly_roots()
1158 		ret = btrfs_run_delayed_refs(trans, root, (unsigned long)-1);  in commit_cowonly_roots()
1164 		ret = btrfs_write_dirty_block_groups(trans, root);  in commit_cowonly_roots()
1167 		ret = btrfs_run_delayed_refs(trans, root, (unsigned long)-1);  in commit_cowonly_roots()
1187 void btrfs_add_dead_root(struct btrfs_root *root)  in btrfs_add_dead_root()  argument
1189 	spin_lock(&root->fs_info->trans_lock);  in btrfs_add_dead_root()
1190 	if (list_empty(&root->root_list))  in btrfs_add_dead_root()
1191 		list_add_tail(&root->root_list, &root->fs_info->dead_roots);  in btrfs_add_dead_root()
1192 	spin_unlock(&root->fs_info->trans_lock);  in btrfs_add_dead_root()
1199 				    struct btrfs_root *root)  in commit_fs_roots()  argument
1202 	struct btrfs_fs_info *fs_info = root->fs_info;  in commit_fs_roots()
1216 			root = gang[i];  in commit_fs_roots()
1218 					(unsigned long)root->root_key.objectid,  in commit_fs_roots()
1222 			btrfs_free_log(trans, root);  in commit_fs_roots()
1223 			btrfs_update_reloc_root(trans, root);  in commit_fs_roots()
1224 			btrfs_orphan_commit_root(trans, root);  in commit_fs_roots()
1226 			btrfs_save_ino_cache(root, trans);  in commit_fs_roots()
1229 			clear_bit(BTRFS_ROOT_FORCE_COW, &root->state);  in commit_fs_roots()
1232 			if (root->commit_root != root->node) {  in commit_fs_roots()
1233 				list_add_tail(&root->dirty_list,  in commit_fs_roots()
1235 				btrfs_set_root_node(&root->root_item,  in commit_fs_roots()
1236 						    root->node);  in commit_fs_roots()
1240 						&root->root_key,  in commit_fs_roots()
1241 						&root->root_item);  in commit_fs_roots()
1245 			btrfs_qgroup_free_meta_all(root);  in commit_fs_roots()
1256 int btrfs_defrag_root(struct btrfs_root *root)  in btrfs_defrag_root()  argument
1258 	struct btrfs_fs_info *info = root->fs_info;  in btrfs_defrag_root()
1262 	if (test_and_set_bit(BTRFS_ROOT_DEFRAG_RUNNING, &root->state))  in btrfs_defrag_root()
1266 		trans = btrfs_start_transaction(root, 0);  in btrfs_defrag_root()
1270 		ret = btrfs_defrag_leaves(trans, root);  in btrfs_defrag_root()
1272 		btrfs_end_transaction(trans, root);  in btrfs_defrag_root()
1276 		if (btrfs_fs_closing(root->fs_info) || ret != -EAGAIN)  in btrfs_defrag_root()
1279 		if (btrfs_defrag_cancelled(root->fs_info)) {  in btrfs_defrag_root()
1285 	clear_bit(BTRFS_ROOT_DEFRAG_RUNNING, &root->state);  in btrfs_defrag_root()
1305 	struct btrfs_root *root = pending->root;  in create_pending_snapshot()  local
1347 		pending->error = btrfs_block_rsv_add(root,  in create_pending_snapshot()
1365 	parent_root = BTRFS_I(parent_inode)->root;  in create_pending_snapshot()
1384 		btrfs_abort_transaction(trans, root, ret);  in create_pending_snapshot()
1395 	ret = btrfs_run_delayed_items(trans, root);  in create_pending_snapshot()
1397 		btrfs_abort_transaction(trans, root, ret);  in create_pending_snapshot()
1401 	record_root_in_trans(trans, root);  in create_pending_snapshot()
1402 	btrfs_set_root_last_snapshot(&root->root_item, trans->transid);  in create_pending_snapshot()
1403 	memcpy(new_root_item, &root->root_item, sizeof(*new_root_item));  in create_pending_snapshot()
1417 	memcpy(new_root_item->parent_uuid, root->root_item.uuid,  in create_pending_snapshot()
1431 	old = btrfs_lock_root_node(root);  in create_pending_snapshot()
1432 	ret = btrfs_cow_block(trans, root, old, NULL, 0, &old);  in create_pending_snapshot()
1436 		btrfs_abort_transaction(trans, root, ret);  in create_pending_snapshot()
1442 	ret = btrfs_copy_root(trans, root, old, &tmp, objectid);  in create_pending_snapshot()
1447 		btrfs_abort_transaction(trans, root, ret);  in create_pending_snapshot()
1451 	set_bit(BTRFS_ROOT_FORCE_COW, &root->state);  in create_pending_snapshot()
1461 		btrfs_abort_transaction(trans, root, ret);  in create_pending_snapshot()
1473 		btrfs_abort_transaction(trans, root, ret);  in create_pending_snapshot()
1478 	pending->snap = btrfs_read_fs_root_no_name(root->fs_info, &key);  in create_pending_snapshot()
1481 		btrfs_abort_transaction(trans, root, ret);  in create_pending_snapshot()
1487 		btrfs_abort_transaction(trans, root, ret);  in create_pending_snapshot()
1491 	ret = btrfs_run_delayed_refs(trans, root, (unsigned long)-1);  in create_pending_snapshot()
1493 		btrfs_abort_transaction(trans, root, ret);  in create_pending_snapshot()
1504 		btrfs_abort_transaction(trans, root, ret);  in create_pending_snapshot()
1513 		btrfs_abort_transaction(trans, root, ret);  in create_pending_snapshot()
1519 		btrfs_abort_transaction(trans, root, ret);  in create_pending_snapshot()
1528 			btrfs_abort_transaction(trans, root, ret);  in create_pending_snapshot()
1533 	ret = btrfs_run_delayed_refs(trans, root, (unsigned long)-1);  in create_pending_snapshot()
1535 		btrfs_abort_transaction(trans, root, ret);  in create_pending_snapshot()
1549 				   root->root_key.objectid,  in create_pending_snapshot()
1552 		btrfs_abort_transaction(trans, root, ret);  in create_pending_snapshot()
1589 static void update_super_roots(struct btrfs_root *root)  in update_super_roots()  argument
1594 	super = root->fs_info->super_copy;  in update_super_roots()
1596 	root_item = &root->fs_info->chunk_root->root_item;  in update_super_roots()
1601 	root_item = &root->fs_info->tree_root->root_item;  in update_super_roots()
1602 	super->root = root_item->bytenr;  in update_super_roots()
1605 	if (btrfs_test_opt(root, SPACE_CACHE))  in update_super_roots()
1607 	if (root->fs_info->update_uuid_tree_gen)  in update_super_roots()
1641 static void wait_current_trans_commit_start(struct btrfs_root *root,  in wait_current_trans_commit_start()  argument
1644 	wait_event(root->fs_info->transaction_blocked_wait,  in wait_current_trans_commit_start()
1653 static void wait_current_trans_commit_start_and_unblock(struct btrfs_root *root,  in wait_current_trans_commit_start_and_unblock()  argument
1656 	wait_event(root->fs_info->transaction_wait,  in wait_current_trans_commit_start_and_unblock()
1667 	struct btrfs_root *root;  member
1681 		__sb_writers_acquired(ac->root->fs_info->sb, SB_FREEZE_FS);  in do_async_commit()
1685 	btrfs_commit_transaction(ac->newtrans, ac->root);  in do_async_commit()
1690 				   struct btrfs_root *root,  in btrfs_commit_transaction_async()  argument
1701 	ac->root = root;  in btrfs_commit_transaction_async()
1702 	ac->newtrans = btrfs_join_transaction(root);  in btrfs_commit_transaction_async()
1713 	btrfs_end_transaction(trans, root);  in btrfs_commit_transaction_async()
1720 		__sb_writers_release(root->fs_info->sb, SB_FREEZE_FS);  in btrfs_commit_transaction_async()
1726 		wait_current_trans_commit_start_and_unblock(root, cur_trans);  in btrfs_commit_transaction_async()
1728 		wait_current_trans_commit_start(root, cur_trans);  in btrfs_commit_transaction_async()
1739 				struct btrfs_root *root, int err)  in cleanup_transaction()  argument
1746 	btrfs_abort_transaction(trans, root, err);  in cleanup_transaction()
1748 	spin_lock(&root->fs_info->trans_lock);  in cleanup_transaction()
1758 	if (cur_trans == root->fs_info->running_transaction) {  in cleanup_transaction()
1760 		spin_unlock(&root->fs_info->trans_lock);  in cleanup_transaction()
1764 		spin_lock(&root->fs_info->trans_lock);  in cleanup_transaction()
1766 	spin_unlock(&root->fs_info->trans_lock);  in cleanup_transaction()
1768 	btrfs_cleanup_one_transaction(trans->transaction, root);  in cleanup_transaction()
1770 	spin_lock(&root->fs_info->trans_lock);  in cleanup_transaction()
1771 	if (cur_trans == root->fs_info->running_transaction)  in cleanup_transaction()
1772 		root->fs_info->running_transaction = NULL;  in cleanup_transaction()
1773 	spin_unlock(&root->fs_info->trans_lock);  in cleanup_transaction()
1776 		sb_end_intwrite(root->fs_info->sb);  in cleanup_transaction()
1780 	trace_btrfs_transaction_commit(root);  in cleanup_transaction()
1784 	btrfs_scrub_cancel(root->fs_info);  in cleanup_transaction()
1810 			     struct btrfs_root *root)  in btrfs_commit_transaction()  argument
1814 	struct btrfs_inode *btree_ino = BTRFS_I(root->fs_info->btree_inode);  in btrfs_commit_transaction()
1820 		btrfs_end_transaction(trans, root);  in btrfs_commit_transaction()
1827 	ret = btrfs_run_delayed_refs(trans, root, 0);  in btrfs_commit_transaction()
1829 		btrfs_end_transaction(trans, root);  in btrfs_commit_transaction()
1833 	btrfs_trans_release_metadata(trans, root);  in btrfs_commit_transaction()
1846 		btrfs_create_pending_block_groups(trans, root);  in btrfs_commit_transaction()
1848 	ret = btrfs_run_delayed_refs(trans, root, 0);  in btrfs_commit_transaction()
1850 		btrfs_end_transaction(trans, root);  in btrfs_commit_transaction()
1870 		mutex_lock(&root->fs_info->ro_block_group_mutex);  in btrfs_commit_transaction()
1874 		mutex_unlock(&root->fs_info->ro_block_group_mutex);  in btrfs_commit_transaction()
1877 			ret = btrfs_start_dirty_block_groups(trans, root);  in btrfs_commit_transaction()
1880 		btrfs_end_transaction(trans, root);  in btrfs_commit_transaction()
1884 	spin_lock(&root->fs_info->trans_lock);  in btrfs_commit_transaction()
1886 		spin_unlock(&root->fs_info->trans_lock);  in btrfs_commit_transaction()
1888 		ret = btrfs_end_transaction(trans, root);  in btrfs_commit_transaction()
1890 		wait_for_commit(root, cur_trans);  in btrfs_commit_transaction()
1901 	wake_up(&root->fs_info->transaction_blocked_wait);  in btrfs_commit_transaction()
1903 	if (cur_trans->list.prev != &root->fs_info->trans_list) {  in btrfs_commit_transaction()
1908 			spin_unlock(&root->fs_info->trans_lock);  in btrfs_commit_transaction()
1910 			wait_for_commit(root, prev_trans);  in btrfs_commit_transaction()
1917 			spin_unlock(&root->fs_info->trans_lock);  in btrfs_commit_transaction()
1920 		spin_unlock(&root->fs_info->trans_lock);  in btrfs_commit_transaction()
1925 	ret = btrfs_start_delalloc_flush(root->fs_info);  in btrfs_commit_transaction()
1929 	ret = btrfs_run_delayed_items(trans, root);  in btrfs_commit_transaction()
1937 	ret = btrfs_run_delayed_items(trans, root);  in btrfs_commit_transaction()
1941 	btrfs_wait_delalloc_flush(root->fs_info);  in btrfs_commit_transaction()
1945 	btrfs_scrub_pause(root);  in btrfs_commit_transaction()
1951 	spin_lock(&root->fs_info->trans_lock);  in btrfs_commit_transaction()
1953 	spin_unlock(&root->fs_info->trans_lock);  in btrfs_commit_transaction()
1967 	mutex_lock(&root->fs_info->reloc_mutex);  in btrfs_commit_transaction()
1974 	ret = create_pending_snapshots(trans, root->fs_info);  in btrfs_commit_transaction()
1976 		mutex_unlock(&root->fs_info->reloc_mutex);  in btrfs_commit_transaction()
1990 	ret = btrfs_run_delayed_items(trans, root);  in btrfs_commit_transaction()
1992 		mutex_unlock(&root->fs_info->reloc_mutex);  in btrfs_commit_transaction()
1996 	ret = btrfs_run_delayed_refs(trans, root, (unsigned long)-1);  in btrfs_commit_transaction()
1998 		mutex_unlock(&root->fs_info->reloc_mutex);  in btrfs_commit_transaction()
2003 	ret = btrfs_qgroup_prepare_account_extents(trans, root->fs_info);  in btrfs_commit_transaction()
2005 		mutex_unlock(&root->fs_info->reloc_mutex);  in btrfs_commit_transaction()
2013 	btrfs_assert_delayed_root_empty(root);  in btrfs_commit_transaction()
2030 	mutex_lock(&root->fs_info->tree_log_mutex);  in btrfs_commit_transaction()
2032 	ret = commit_fs_roots(trans, root);  in btrfs_commit_transaction()
2034 		mutex_unlock(&root->fs_info->tree_log_mutex);  in btrfs_commit_transaction()
2035 		mutex_unlock(&root->fs_info->reloc_mutex);  in btrfs_commit_transaction()
2043 	btrfs_apply_pending_changes(root->fs_info);  in btrfs_commit_transaction()
2048 	btrfs_free_log_root_tree(trans, root->fs_info);  in btrfs_commit_transaction()
2054 	ret = btrfs_qgroup_account_extents(trans, root->fs_info);  in btrfs_commit_transaction()
2056 		mutex_unlock(&root->fs_info->tree_log_mutex);  in btrfs_commit_transaction()
2057 		mutex_unlock(&root->fs_info->reloc_mutex);  in btrfs_commit_transaction()
2061 	ret = commit_cowonly_roots(trans, root);  in btrfs_commit_transaction()
2063 		mutex_unlock(&root->fs_info->tree_log_mutex);  in btrfs_commit_transaction()
2064 		mutex_unlock(&root->fs_info->reloc_mutex);  in btrfs_commit_transaction()
2074 		mutex_unlock(&root->fs_info->tree_log_mutex);  in btrfs_commit_transaction()
2075 		mutex_unlock(&root->fs_info->reloc_mutex);  in btrfs_commit_transaction()
2079 	btrfs_prepare_extent_commit(trans, root);  in btrfs_commit_transaction()
2081 	cur_trans = root->fs_info->running_transaction;  in btrfs_commit_transaction()
2083 	btrfs_set_root_node(&root->fs_info->tree_root->root_item,  in btrfs_commit_transaction()
2084 			    root->fs_info->tree_root->node);  in btrfs_commit_transaction()
2085 	list_add_tail(&root->fs_info->tree_root->dirty_list,  in btrfs_commit_transaction()
2088 	btrfs_set_root_node(&root->fs_info->chunk_root->root_item,  in btrfs_commit_transaction()
2089 			    root->fs_info->chunk_root->node);  in btrfs_commit_transaction()
2090 	list_add_tail(&root->fs_info->chunk_root->dirty_list,  in btrfs_commit_transaction()
2093 	switch_commit_roots(cur_trans, root->fs_info);  in btrfs_commit_transaction()
2098 	update_super_roots(root);  in btrfs_commit_transaction()
2100 	btrfs_set_super_log_root(root->fs_info->super_copy, 0);  in btrfs_commit_transaction()
2101 	btrfs_set_super_log_root_level(root->fs_info->super_copy, 0);  in btrfs_commit_transaction()
2102 	memcpy(root->fs_info->super_for_commit, root->fs_info->super_copy,  in btrfs_commit_transaction()
2103 	       sizeof(*root->fs_info->super_copy));  in btrfs_commit_transaction()
2105 	btrfs_update_commit_device_size(root->fs_info);  in btrfs_commit_transaction()
2106 	btrfs_update_commit_device_bytes_used(root, cur_trans);  in btrfs_commit_transaction()
2113 	spin_lock(&root->fs_info->trans_lock);  in btrfs_commit_transaction()
2115 	root->fs_info->running_transaction = NULL;  in btrfs_commit_transaction()
2116 	spin_unlock(&root->fs_info->trans_lock);  in btrfs_commit_transaction()
2117 	mutex_unlock(&root->fs_info->reloc_mutex);  in btrfs_commit_transaction()
2119 	wake_up(&root->fs_info->transaction_wait);  in btrfs_commit_transaction()
2121 	ret = btrfs_write_and_wait_transaction(trans, root);  in btrfs_commit_transaction()
2123 		btrfs_std_error(root->fs_info, ret,  in btrfs_commit_transaction()
2125 		mutex_unlock(&root->fs_info->tree_log_mutex);  in btrfs_commit_transaction()
2129 	ret = write_ctree_super(trans, root, 0);  in btrfs_commit_transaction()
2131 		mutex_unlock(&root->fs_info->tree_log_mutex);  in btrfs_commit_transaction()
2139 	mutex_unlock(&root->fs_info->tree_log_mutex);  in btrfs_commit_transaction()
2141 	btrfs_finish_extent_commit(trans, root);  in btrfs_commit_transaction()
2144 		btrfs_clear_space_info_full(root->fs_info);  in btrfs_commit_transaction()
2146 	root->fs_info->last_trans_committed = cur_trans->transid;  in btrfs_commit_transaction()
2154 	spin_lock(&root->fs_info->trans_lock);  in btrfs_commit_transaction()
2156 	spin_unlock(&root->fs_info->trans_lock);  in btrfs_commit_transaction()
2162 		sb_end_intwrite(root->fs_info->sb);  in btrfs_commit_transaction()
2164 	trace_btrfs_transaction_commit(root);  in btrfs_commit_transaction()
2166 	btrfs_scrub_continue(root);  in btrfs_commit_transaction()
2173 	if (current != root->fs_info->transaction_kthread &&  in btrfs_commit_transaction()
2174 	    current != root->fs_info->cleaner_kthread)  in btrfs_commit_transaction()
2175 		btrfs_run_delayed_iputs(root);  in btrfs_commit_transaction()
2180 	btrfs_scrub_continue(root);  in btrfs_commit_transaction()
2182 	btrfs_trans_release_metadata(trans, root);  in btrfs_commit_transaction()
2185 	btrfs_warn(root->fs_info, "Skipping commit of aborted transaction.");  in btrfs_commit_transaction()
2188 	cleanup_transaction(trans, root, ret);  in btrfs_commit_transaction()
2203 int btrfs_clean_one_deleted_snapshot(struct btrfs_root *root)  in btrfs_clean_one_deleted_snapshot()  argument
2206 	struct btrfs_fs_info *fs_info = root->fs_info;  in btrfs_clean_one_deleted_snapshot()
2213 	root = list_first_entry(&fs_info->dead_roots,  in btrfs_clean_one_deleted_snapshot()
2215 	list_del_init(&root->root_list);  in btrfs_clean_one_deleted_snapshot()
2218 	pr_debug("BTRFS: cleaner removing %llu\n", root->objectid);  in btrfs_clean_one_deleted_snapshot()
2220 	btrfs_kill_all_delayed_nodes(root);  in btrfs_clean_one_deleted_snapshot()
2222 	if (btrfs_header_backref_rev(root->node) <  in btrfs_clean_one_deleted_snapshot()
2224 		ret = btrfs_drop_snapshot(root, NULL, 0, 0);  in btrfs_clean_one_deleted_snapshot()
2226 		ret = btrfs_drop_snapshot(root, NULL, 1, 0);  in btrfs_clean_one_deleted_snapshot()