9  * - added disk storage for bitmap
62  *    a '1' bit is read from storage at startup.
195 	} storage;  member
237 	return bitmap->storage.filemap &&  in __bitmap_enabled()
440 	struct bitmap_storage *store = &bitmap->storage;  in __write_sb_page()
441 	unsigned long num_pages = bitmap->storage.file_pages;  in __write_sb_page()
649 	struct bitmap_storage *store = &bitmap->storage;  in filemap_write_page()
670 	if (bitmap->storage.file)  in md_bitmap_wait_writes()
695 	if (!bitmap->storage.sb_page) /* no superblock */  in bitmap_update_sb()
697 	sb = kmap_local_page(bitmap->storage.sb_page);  in bitmap_update_sb()
719 	if (bitmap->storage.file)  in bitmap_update_sb()
720 		write_file_page(bitmap, bitmap->storage.sb_page, 1);  in bitmap_update_sb()
722 		write_sb_page(bitmap, bitmap->storage.sb_index,  in bitmap_update_sb()
723 			      bitmap->storage.sb_page, 1);  in bitmap_update_sb()
730 	if (!bitmap || !bitmap->storage.sb_page)  in bitmap_print_sb()
732 	sb = kmap_local_page(bitmap->storage.sb_page);  in bitmap_print_sb()
770 	bitmap->storage.sb_page = alloc_page(GFP_KERNEL | __GFP_ZERO);  in md_bitmap_new_disk_sb()
771 	if (bitmap->storage.sb_page == NULL)  in md_bitmap_new_disk_sb()
773 	bitmap->storage.sb_index = 0;  in md_bitmap_new_disk_sb()
775 	sb = kmap_local_page(bitmap->storage.sb_page);  in md_bitmap_new_disk_sb()
836 	if (!bitmap->storage.file && !bitmap->mddev->bitmap_info.offset) {  in md_bitmap_read_sb()
848 	bitmap->storage.sb_page = sb_page;  in md_bitmap_read_sb()
866 	if (bitmap->storage.file) {  in md_bitmap_read_sb()
867 		loff_t isize = i_size_read(bitmap->storage.file->f_mapping->host);  in md_bitmap_read_sb()
870 		err = read_file_page(bitmap->storage.file, 0,  in md_bitmap_read_sb()
1108 		if (bitmap->storage.file) {  in md_bitmap_file_kick()
1110 				bmname(bitmap), bitmap->storage.file);  in md_bitmap_file_kick()
1128 	set_bit((pnum<<2) + attr, bitmap->storage.filemap_attr);  in set_page_attr()
1134 	clear_bit((pnum<<2) + attr, bitmap->storage.filemap_attr);  in clear_page_attr()
1140 	return test_bit((pnum<<2) + attr, bitmap->storage.filemap_attr);  in test_page_attr()
1147 				  bitmap->storage.filemap_attr);  in test_and_clear_page_attr()
1162 	struct bitmap_storage *store = &bitmap->storage;  in md_bitmap_file_set_bit()
1170 	page = filemap_get_page(&bitmap->storage, chunk);  in md_bitmap_file_set_bit()
1173 	bit = file_page_offset(&bitmap->storage, chunk);  in md_bitmap_file_set_bit()
1193 	struct bitmap_storage *store = &bitmap->storage;  in md_bitmap_file_clear_bit()
1201 	page = filemap_get_page(&bitmap->storage, chunk);  in md_bitmap_file_clear_bit()
1204 	bit = file_page_offset(&bitmap->storage, chunk);  in md_bitmap_file_clear_bit()
1225 	page = filemap_get_page(&bitmap->storage, chunk);  in md_bitmap_file_test_bit()
1228 	bit = file_page_offset(&bitmap->storage, chunk);  in md_bitmap_file_test_bit()
1252 	for (i = 0; i < bitmap->storage.file_pages; i++) {  in __bitmap_unplug()
1334 	struct bitmap_storage *store = &bitmap->storage;  in md_bitmap_init_from_disk()
1416 		struct page *page = filemap_get_page(&bitmap->storage, i);  in md_bitmap_init_from_disk()
1417 		unsigned long bit = file_page_offset(&bitmap->storage, i);  in md_bitmap_init_from_disk()
1457 	if (!bitmap || !bitmap->storage.filemap)  in bitmap_write_all()
1461 	if (bitmap->storage.file)  in bitmap_write_all()
1464 	for (i = 0; i < bitmap->storage.file_pages; i++)  in bitmap_write_all()
1548 	for (j = 0; j < bitmap->storage.file_pages; j++)  in bitmap_daemon_work()
1560 		if (bitmap->storage.filemap) {  in bitmap_daemon_work()
1561 			sb = kmap_local_page(bitmap->storage.sb_page);  in bitmap_daemon_work()
1616 	     j < bitmap->storage.file_pages  in bitmap_daemon_work()
1623 		if (bitmap->storage.filemap &&  in bitmap_daemon_work()
2043 	md_bitmap_file_unmap(&bitmap->storage);  in md_bitmap_free()
2168 	bitmap->storage.file = file;  in __bitmap_create()
2340 		for (i = 0; i < bitmap->storage.file_pages; i++)  in bitmap_copy_from_slot()
2362 	struct bitmap_storage *storage;  in bitmap_get_stats()  local
2370 	    !bitmap->storage.sb_page)  in bitmap_get_stats()
2372 	sb = kmap_local_page(bitmap->storage.sb_page);  in bitmap_get_stats()
2380 	storage = &bitmap->storage;  in bitmap_get_stats()
2381 	stats->file_pages = storage->file_pages;  in bitmap_get_stats()
2382 	stats->file = storage->file;  in bitmap_get_stats()
2394 	 * Then possibly allocate new storage space.  in __bitmap_resize()
2413 	if (bitmap->storage.file && !init) {  in __bitmap_resize()
2473 	store.file = bitmap->storage.file;  in __bitmap_resize()
2474 	bitmap->storage.file = NULL;  in __bitmap_resize()
2476 	if (store.sb_page && bitmap->storage.sb_page)  in __bitmap_resize()
2478 		       page_address(bitmap->storage.sb_page),  in __bitmap_resize()
2481 	md_bitmap_file_unmap(&bitmap->storage);  in __bitmap_resize()
2482 	bitmap->storage = store;  in __bitmap_resize()
2583 		for (i = 0; i < bitmap->storage.file_pages; i++)  in __bitmap_resize()
2737 	if (bitmap && sectors < (bitmap->storage.bytes + 511) >> 9)  in space_store()