501  * nilfs_mdt_setup_shadow_map - setup shadow map and bind it to metadata file
503  * @shadow: shadow mapping
506 			       struct nilfs_shadow_map *shadow)  in nilfs_mdt_setup_shadow_map()  argument
510 	INIT_LIST_HEAD(&shadow->frozen_buffers);  in nilfs_mdt_setup_shadow_map()
511 	address_space_init_once(&shadow->frozen_data);  in nilfs_mdt_setup_shadow_map()
512 	nilfs_mapping_init(&shadow->frozen_data, inode);  in nilfs_mdt_setup_shadow_map()
513 	address_space_init_once(&shadow->frozen_btnodes);  in nilfs_mdt_setup_shadow_map()
514 	nilfs_mapping_init(&shadow->frozen_btnodes, inode);  in nilfs_mdt_setup_shadow_map()
515 	mi->mi_shadow = shadow;  in nilfs_mdt_setup_shadow_map()
520  * nilfs_mdt_save_to_shadow_map - copy bmap and dirty pages to shadow map
527 	struct nilfs_shadow_map *shadow = mi->mi_shadow;  in nilfs_mdt_save_to_shadow_map()  local
530 	ret = nilfs_copy_dirty_pages(&shadow->frozen_data, inode->i_mapping);  in nilfs_mdt_save_to_shadow_map()
534 	ret = nilfs_copy_dirty_pages(&shadow->frozen_btnodes,  in nilfs_mdt_save_to_shadow_map()
539 	nilfs_bmap_save(ii->i_bmap, &shadow->bmap_store);  in nilfs_mdt_save_to_shadow_map()
546 	struct nilfs_shadow_map *shadow = NILFS_MDT(inode)->mi_shadow;  in nilfs_mdt_freeze_buffer()  local
551 	page = grab_cache_page(&shadow->frozen_data, bh->b_page->index);  in nilfs_mdt_freeze_buffer()
564 			      &shadow->frozen_buffers);  in nilfs_mdt_freeze_buffer()
578 	struct nilfs_shadow_map *shadow = NILFS_MDT(inode)->mi_shadow;  in nilfs_mdt_get_frozen_buffer()  local
583 	page = find_lock_page(&shadow->frozen_data, bh->b_page->index);  in nilfs_mdt_get_frozen_buffer()
595 static void nilfs_release_frozen_buffers(struct nilfs_shadow_map *shadow)  in nilfs_release_frozen_buffers()  argument
597 	struct list_head *head = &shadow->frozen_buffers;  in nilfs_release_frozen_buffers()
616 	struct nilfs_shadow_map *shadow = mi->mi_shadow;  in nilfs_mdt_restore_from_shadow_map()  local
624 	nilfs_copy_back_pages(inode->i_mapping, &shadow->frozen_data);  in nilfs_mdt_restore_from_shadow_map()
627 	nilfs_copy_back_pages(&ii->i_btnode_cache, &shadow->frozen_btnodes);  in nilfs_mdt_restore_from_shadow_map()
629 	nilfs_bmap_restore(ii->i_bmap, &shadow->bmap_store);  in nilfs_mdt_restore_from_shadow_map()
635  * nilfs_mdt_clear_shadow_map - truncate pages in shadow map caches
641 	struct nilfs_shadow_map *shadow = mi->mi_shadow;  in nilfs_mdt_clear_shadow_map()  local
644 	nilfs_release_frozen_buffers(shadow);  in nilfs_mdt_clear_shadow_map()
645 	truncate_inode_pages(&shadow->frozen_data, 0);  in nilfs_mdt_clear_shadow_map()
646 	truncate_inode_pages(&shadow->frozen_btnodes, 0);  in nilfs_mdt_clear_shadow_map()