294 static int mark_swapfiles(struct swap_map_handle *handle, unsigned int flags)  in mark_swapfiles()  argument
303 		swsusp_header->image = handle->first_sector;  in mark_swapfiles()
306 			swsusp_header->crc32 = handle->crc32;  in mark_swapfiles()
384 static void release_swap_writer(struct swap_map_handle *handle)  in release_swap_writer()  argument
386 	if (handle->cur)  in release_swap_writer()
387 		free_page((unsigned long)handle->cur);  in release_swap_writer()
388 	handle->cur = NULL;  in release_swap_writer()
391 static int get_swap_writer(struct swap_map_handle *handle)  in get_swap_writer()  argument
402 	handle->cur = (struct swap_map_page *)get_zeroed_page(GFP_KERNEL);  in get_swap_writer()
403 	if (!handle->cur) {  in get_swap_writer()
407 	handle->cur_swap = alloc_swapdev_block(root_swap);  in get_swap_writer()
408 	if (!handle->cur_swap) {  in get_swap_writer()
412 	handle->k = 0;  in get_swap_writer()
413 	handle->reqd_free_pages = reqd_free_pages();  in get_swap_writer()
414 	handle->first_sector = handle->cur_swap;  in get_swap_writer()
417 	release_swap_writer(handle);  in get_swap_writer()
423 static int swap_write_page(struct swap_map_handle *handle, void *buf,  in swap_write_page()  argument
429 	if (!handle->cur)  in swap_write_page()
435 	handle->cur->entries[handle->k++] = offset;  in swap_write_page()
436 	if (handle->k >= MAP_PAGE_ENTRIES) {  in swap_write_page()
440 		handle->cur->next_swap = offset;  in swap_write_page()
441 		error = write_page(handle->cur, handle->cur_swap, hb);  in swap_write_page()
444 		clear_page(handle->cur);  in swap_write_page()
445 		handle->cur_swap = offset;  in swap_write_page()
446 		handle->k = 0;  in swap_write_page()
448 		if (hb && low_free_pages() <= handle->reqd_free_pages) {  in swap_write_page()
456 			handle->reqd_free_pages = reqd_free_pages();  in swap_write_page()
463 static int flush_swap_writer(struct swap_map_handle *handle)  in flush_swap_writer()  argument
465 	if (handle->cur && handle->cur_swap)  in flush_swap_writer()
466 		return write_page(handle->cur, handle->cur_swap, NULL);  in flush_swap_writer()
471 static int swap_writer_finish(struct swap_map_handle *handle,  in swap_writer_finish()  argument
475 		flush_swap_writer(handle);  in swap_writer_finish()
477 		error = mark_swapfiles(handle, flags);  in swap_writer_finish()
483 	release_swap_writer(handle);  in swap_writer_finish()
513 static int save_image(struct swap_map_handle *handle,  in save_image()  argument
538 		ret = swap_write_page(handle, data_of(*snapshot), &hb);  in save_image()
649 static int save_image_lzo(struct swap_map_handle *handle,  in save_image_lzo()  argument
724 	handle->crc32 = 0;  in save_image_lzo()
725 	crc->crc32 = &handle->crc32;  in save_image_lzo()
743 	handle->reqd_free_pages = reqd_free_pages();  in save_image_lzo()
826 				ret = swap_write_page(handle, page, &hb);  in save_image_lzo()
891 	struct swap_map_handle handle;  in swsusp_write()  local
898 	error = get_swap_writer(&handle);  in swsusp_write()
919 	error = swap_write_page(&handle, header, NULL);  in swsusp_write()
922 			save_image(&handle, &snapshot, pages - 1) :  in swsusp_write()
923 			save_image_lzo(&handle, &snapshot, pages - 1);  in swsusp_write()
926 	error = swap_writer_finish(&handle, flags, error);  in swsusp_write()
935 static void release_swap_reader(struct swap_map_handle *handle)  in release_swap_reader()  argument
939 	while (handle->maps) {  in release_swap_reader()
940 		if (handle->maps->map)  in release_swap_reader()
941 			free_page((unsigned long)handle->maps->map);  in release_swap_reader()
942 		tmp = handle->maps;  in release_swap_reader()
943 		handle->maps = handle->maps->next;  in release_swap_reader()
946 	handle->cur = NULL;  in release_swap_reader()
949 static int get_swap_reader(struct swap_map_handle *handle,  in get_swap_reader()  argument
961 	handle->cur = NULL;  in get_swap_reader()
962 	last = handle->maps = NULL;  in get_swap_reader()
965 		tmp = kmalloc(sizeof(*handle->maps), GFP_KERNEL);  in get_swap_reader()
967 			release_swap_reader(handle);  in get_swap_reader()
971 		if (!handle->maps)  in get_swap_reader()
972 			handle->maps = tmp;  in get_swap_reader()
980 			release_swap_reader(handle);  in get_swap_reader()
986 			release_swap_reader(handle);  in get_swap_reader()
991 	handle->k = 0;  in get_swap_reader()
992 	handle->cur = handle->maps->map;  in get_swap_reader()
996 static int swap_read_page(struct swap_map_handle *handle, void *buf,  in swap_read_page()  argument
1003 	if (!handle->cur)  in swap_read_page()
1005 	offset = handle->cur->entries[handle->k];  in swap_read_page()
1011 	if (++handle->k >= MAP_PAGE_ENTRIES) {  in swap_read_page()
1012 		handle->k = 0;  in swap_read_page()
1013 		free_page((unsigned long)handle->maps->map);  in swap_read_page()
1014 		tmp = handle->maps;  in swap_read_page()
1015 		handle->maps = handle->maps->next;  in swap_read_page()
1017 		if (!handle->maps)  in swap_read_page()
1018 			release_swap_reader(handle);  in swap_read_page()
1020 			handle->cur = handle->maps->map;  in swap_read_page()
1025 static int swap_reader_finish(struct swap_map_handle *handle)  in swap_reader_finish()  argument
1027 	release_swap_reader(handle);  in swap_reader_finish()
1038 static int load_image(struct swap_map_handle *handle,  in load_image()  argument
1063 		ret = swap_read_page(handle, data_of(*snapshot), &hb);  in load_image()
1139 static int load_image_lzo(struct swap_map_handle *handle,  in load_image_lzo()  argument
1217 	handle->crc32 = 0;  in load_image_lzo()
1218 	crc->crc32 = &handle->crc32;  in load_image_lzo()
1279 			ret = swap_read_page(handle, page[ring], &hb);  in load_image_lzo()
1285 				if (handle->cur &&  in load_image_lzo()
1286 				    handle->cur->entries[handle->k]) {  in load_image_lzo()
1432 				if(handle->crc32 != swsusp_header->crc32) {  in load_image_lzo()
1469 	struct swap_map_handle handle;  in swsusp_read()  local
1478 	error = get_swap_reader(&handle, flags_p);  in swsusp_read()
1482 		error = swap_read_page(&handle, header, NULL);  in swsusp_read()
1485 			load_image(&handle, &snapshot, header->pages - 1) :  in swsusp_read()
1486 			load_image_lzo(&handle, &snapshot, header->pages - 1);  in swsusp_read()
1488 	swap_reader_finish(&handle);  in swsusp_read()