266 	struct ubd *ubd_dev;  in ubd_setup_common()  local
319 	ubd_dev = &ubd_devs[n];  in ubd_setup_common()
320 	if(ubd_dev->file != NULL){  in ubd_setup_common()
338 			ubd_dev->no_cow = 1;  in ubd_setup_common()
341 			ubd_dev->shared = 1;  in ubd_setup_common()
367 		if(ubd_dev->no_cow){  in ubd_setup_common()
377 	ubd_dev->file = str;  in ubd_setup_common()
378 	ubd_dev->cow.file = backing_file;  in ubd_setup_common()
379 	ubd_dev->boot_openflags = flags;  in ubd_setup_common()
497 static inline int ubd_file_size(struct ubd *ubd_dev, __u64 *size_out)  in ubd_file_size()  argument
511 	if (ubd_dev->file && ubd_dev->cow.file) {  in ubd_file_size()
512 		file = ubd_dev->cow.file;  in ubd_file_size()
517 	fd = os_open_file(ubd_dev->file, of_read(OPENFLAGS()), 0);  in ubd_file_size()
526 		file = ubd_dev->file;  in ubd_file_size()
720 static void ubd_close_dev(struct ubd *ubd_dev)  in ubd_close_dev()  argument
722 	os_close_file(ubd_dev->fd);  in ubd_close_dev()
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()
731 static int ubd_open_dev(struct ubd *ubd_dev)  in ubd_open_dev()  argument
738 	ubd_dev->openflags = ubd_dev->boot_openflags;  in ubd_open_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()
743 	fd = open_ubd_file(ubd_dev->file, &ubd_dev->openflags, ubd_dev->shared,  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()
750 					  ubd_dev->openflags, 1 << 9, PAGE_SIZE,  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()
761 		printk("Failed to open '%s', errno = %d\n", ubd_dev->file,  in ubd_open_dev()
765 	ubd_dev->fd = fd;  in ubd_open_dev()
767 	if(ubd_dev->cow.file != NULL){  in ubd_open_dev()
768 		blk_queue_max_hw_sectors(ubd_dev->queue, 8 * sizeof(long));  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()
784 		flags = ubd_dev->openflags;  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()
793 	os_close_file(ubd_dev->fd);  in ubd_open_dev()
799 	struct ubd *ubd_dev = dev_get_drvdata(dev);  in ubd_device_release()  local
801 	blk_cleanup_queue(ubd_dev->queue);  in ubd_device_release()
802 	*ubd_dev = ((struct ubd) DEFAULT_UBD);  in ubd_device_release()
845 	struct ubd *ubd_dev = &ubd_devs[n];  in ubd_add()  local
848 	if(ubd_dev->file == NULL)  in ubd_add()
851 	err = ubd_file_size(ubd_dev, &ubd_dev->size);  in ubd_add()
857 	ubd_dev->size = ROUND_BLOCK(ubd_dev->size);  in ubd_add()
859 	INIT_LIST_HEAD(&ubd_dev->restart);  in ubd_add()
860 	sg_init_table(ubd_dev->sg, MAX_SG);  in ubd_add()
863 	ubd_dev->queue = blk_init_queue(do_ubd_request, &ubd_dev->lock);  in ubd_add()
864 	if (ubd_dev->queue == NULL) {  in ubd_add()
868 	ubd_dev->queue->queuedata = ubd_dev;  in ubd_add()
869 	blk_queue_flush(ubd_dev->queue, REQ_FLUSH);  in ubd_add()
871 	blk_queue_max_segments(ubd_dev->queue, MAX_SG);  in ubd_add()
872 	err = ubd_disk_register(UBD_MAJOR, ubd_dev->size, n, &ubd_gendisk[n]);  in ubd_add()
879 		ubd_disk_register(fake_major, ubd_dev->size, n,  in ubd_add()
894 	blk_cleanup_queue(ubd_dev->queue);  in ubd_add()
937 	struct ubd *ubd_dev;  in ubd_get_config()  local
946 	ubd_dev = &ubd_devs[n];  in ubd_get_config()
949 	if(ubd_dev->file == NULL){  in ubd_get_config()
954 	CONFIG_CHUNK(str, size, len, ubd_dev->file, 0);  in ubd_get_config()
956 	if(ubd_dev->cow.file != NULL){  in ubd_get_config()
958 		CONFIG_CHUNK(str, size, len, ubd_dev->cow.file, 1);  in ubd_get_config()
980 	struct ubd *ubd_dev;  in ubd_remove()  local
985 	ubd_dev = &ubd_devs[n];  in ubd_remove()
987 	if(ubd_dev->file == NULL)  in ubd_remove()
992 	if(ubd_dev->count > 0)  in ubd_remove()
1008 	platform_device_unregister(&ubd_dev->pdev);  in ubd_remove()
1036 	struct ubd *ubd_dev = &ubd_devs[0];  in ubd0_init()  local
1039 	if(ubd_dev->file == NULL)  in ubd0_init()
1040 		ubd_dev->file = "root_fs";  in ubd0_init()
1116 	struct ubd *ubd_dev = disk->private_data;  in ubd_open()  local
1120 	if(ubd_dev->count == 0){  in ubd_open()
1121 		err = ubd_open_dev(ubd_dev);  in ubd_open()
1124 			       disk->disk_name, ubd_dev->file, -err);  in ubd_open()
1128 	ubd_dev->count++;  in ubd_open()
1129 	set_disk_ro(disk, !ubd_dev->openflags.w);  in ubd_open()
1144 	struct ubd *ubd_dev = disk->private_data;  in ubd_release()  local
1147 	if(--ubd_dev->count == 0)  in ubd_release()
1148 		ubd_close_dev(ubd_dev);  in ubd_release()
1218 	struct ubd *ubd_dev = disk->private_data;  in prepare_request()  local
1221 	io_req->fds[0] = (ubd_dev->cow.file != NULL) ? ubd_dev->cow.fd :  in prepare_request()
1222 		ubd_dev->fd;  in prepare_request()
1223 	io_req->fds[1] = ubd_dev->fd;  in prepare_request()
1232 	io_req->offsets[1] = ubd_dev->cow.data_offset;  in prepare_request()
1236 	if(ubd_dev->cow.file != NULL)  in prepare_request()
1237 		cowify_req(io_req, ubd_dev->cow.bitmap,  in prepare_request()
1238 			   ubd_dev->cow.bitmap_offset, ubd_dev->cow.bitmap_len);  in prepare_request()
1247 	struct ubd *ubd_dev = disk->private_data;  in prepare_flush_request()  local
1250 	io_req->fds[0] = (ubd_dev->cow.file != NULL) ? ubd_dev->cow.fd :  in prepare_flush_request()
1251 		ubd_dev->fd;  in prepare_flush_request()
1333 	struct ubd *ubd_dev = bdev->bd_disk->private_data;  in ubd_getgeo()  local
1337 	geo->cylinders = ubd_dev->size / (128 * 32 * 512);  in ubd_getgeo()
1344 	struct ubd *ubd_dev = bdev->bd_disk->private_data;  in ubd_ioctl()  local
1351 		ubd_id[ATA_ID_CYLS]	= ubd_dev->size / (128 * 32 * 512);  in ubd_ioctl()