1 files changed, 22 insertions, 0 deletions

diff --git a/block/ioctl.c b/block/ioctl.c
index 6e278474f9a8..82030e1dfd63 100644
--- a/block/ioctl.c
+++ b/block/ioctl.c
@@ -1,6 +1,7 @@
 #include <linux/sched.h>                /* for capable() */
 #include <linux/blkdev.h>
 #include <linux/blkpg.h>
+#include <linux/hdreg.h>
 #include <linux/backing-dev.h>
 #include <linux/buffer_head.h>
 #include <linux/smp_lock.h>
@@ -245,6 +246,27 @@ int blkdev_ioctl(struct inode *inode, struct file *file, unsigned cmd,
                 set_device_ro(bdev, n);
                 unlock_kernel();
                 return 0;
+        case HDIO_GETGEO: {
+                struct hd_geometry geo;
+
+                if (!arg)
+                        return -EINVAL;
+                if (!disk->fops->getgeo)
+                        return -ENOTTY;
+
+                /*
+                 * We need to set the startsect first, the driver may
+                 * want to override it.
+                 */
+                geo.start = get_start_sect(bdev);
+                ret = disk->fops->getgeo(bdev, &geo);
+                if (ret)
+                        return ret;
+                if (copy_to_user((struct hd_geometry __user *)arg, &geo,
+                                        sizeof(geo)))
+                        return -EFAULT;
+                return 0;
+        }
         }
 
         lock_kernel();