+ if (i >= 10) {
+ log_error("Kernel partitions never appeared.");
+ return -ENXIO;
+ }
+
+ e = udev_enumerate_new(udev);
+ if (!e)
+ return log_oom();
+
+ r = udev_enumerate_add_match_parent(e, d);
+ if (r < 0)
+ return log_oom();
+
+ r = udev_enumerate_scan_devices(e);
+ if (r < 0)
+ return log_error_errno(r, "Failed to scan for partition devices of %s: %m", arg_image);
+
+ /* Count the partitions enumerated by the kernel */
+ n = 0;
+ first = udev_enumerate_get_list_entry(e);
+ udev_list_entry_foreach(item, first)
+ n++;
+
+ /* Count the partitions enumerated by blkid */
+ m = blkid_partlist_numof_partitions(pl);
+ if (n == m + 1)
+ break;
+ if (n > m + 1) {
+ log_error("blkid and kernel partition list do not match.");
+ return -EIO;
+ }
+ if (n < m + 1) {
+ unsigned j;
+
+ /* The kernel has probed fewer partitions than
+ * blkid? Maybe the kernel prober is still
+ * running or it got EBUSY because udev
+ * already opened the device. Let's reprobe
+ * the device, which is a synchronous call
+ * that waits until probing is complete. */
+
+ for (j = 0; j < 20; j++) {
+
+ r = ioctl(fd, BLKRRPART, 0);
+ if (r < 0)
+ r = -errno;
+ if (r >= 0 || r != -EBUSY)
+ break;
+
+ /* If something else has the device
+ * open, such as an udev rule, the
+ * ioctl will return EBUSY. Since
+ * there's no way to wait until it
+ * isn't busy anymore, let's just wait
+ * a bit, and try again.
+ *
+ * This is really something they
+ * should fix in the kernel! */
+
+ usleep(50 * USEC_PER_MSEC);
+ }
+
+ if (r < 0)
+ return log_error_errno(r, "Failed to reread partition table: %m");
+ }
+
+ e = udev_enumerate_unref(e);
+ }