119 struct cow {  struct
144 	struct cow cow;  member
171 	.cow =			DEFAULT_COW, \
378 	ubd_dev->cow.file = backing_file;  in ubd_setup_common()
511 	if (ubd_dev->file && ubd_dev->cow.file) {  in ubd_file_size()
512 		file = ubd_dev->cow.file;  in ubd_file_size()
584 static int path_requires_switch(char *from_cmdline, char *from_cow, char *cow)  in path_requires_switch()  argument
611 	       from_cmdline, from_cow, cow);  in path_requires_switch()
723 	if(ubd_dev->cow.file == NULL)  in ubd_close_dev()
726 	os_close_file(ubd_dev->cow.fd);  in ubd_close_dev()
727 	vfree(ubd_dev->cow.bitmap);  in ubd_close_dev()
728 	ubd_dev->cow.bitmap = NULL;  in ubd_close_dev()
740 	create_ptr = (ubd_dev->cow.file != NULL) ? &create_cow : NULL;  in ubd_open_dev()
741 	back_ptr = ubd_dev->no_cow ? NULL : &ubd_dev->cow.file;  in ubd_open_dev()
744 				back_ptr, &ubd_dev->cow.bitmap_offset,  in ubd_open_dev()
745 				&ubd_dev->cow.bitmap_len, &ubd_dev->cow.data_offset,  in ubd_open_dev()
749 		fd = create_cow_file(ubd_dev->file, ubd_dev->cow.file,  in ubd_open_dev()
751 					  &ubd_dev->cow.bitmap_offset,  in ubd_open_dev()
752 					  &ubd_dev->cow.bitmap_len,  in ubd_open_dev()
753 					  &ubd_dev->cow.data_offset);  in ubd_open_dev()
756 			       "\"%s\"\n", ubd_dev->file, ubd_dev->cow.file);  in ubd_open_dev()
767 	if(ubd_dev->cow.file != NULL){  in ubd_open_dev()
771 		ubd_dev->cow.bitmap = vmalloc(ubd_dev->cow.bitmap_len);  in ubd_open_dev()
772 		if(ubd_dev->cow.bitmap == NULL){  in ubd_open_dev()
778 		err = read_cow_bitmap(ubd_dev->fd, ubd_dev->cow.bitmap,  in ubd_open_dev()
779 				      ubd_dev->cow.bitmap_offset,  in ubd_open_dev()
780 				      ubd_dev->cow.bitmap_len);  in ubd_open_dev()
786 		err = open_ubd_file(ubd_dev->cow.file, &flags, ubd_dev->shared, NULL,  in ubd_open_dev()
789 		ubd_dev->cow.fd = err;  in ubd_open_dev()
955 	if(ubd_dev->cow.file != NULL){  in ubd_get_config()
957 		CONFIG_CHUNK(str, size, len, ubd_dev->cow.file, 1);  in ubd_get_config()
1220 	io_req->fds[0] = (ubd_dev->cow.file != NULL) ? ubd_dev->cow.fd :  in prepare_request()
1231 	io_req->offsets[1] = ubd_dev->cow.data_offset;  in prepare_request()
1235 	if(ubd_dev->cow.file != NULL)  in prepare_request()
1236 		cowify_req(io_req, ubd_dev->cow.bitmap,  in prepare_request()
1237 			   ubd_dev->cow.bitmap_offset, ubd_dev->cow.bitmap_len);  in prepare_request()