1 files changed, 13 insertions, 1 deletions

diff --git a/fs/ocfs2/ioctl.c b/fs/ocfs2/ioctl.c
index 31fbb0619510..7d9d9c132cef 100644
--- a/fs/ocfs2/ioctl.c
+++ b/fs/ocfs2/ioctl.c
@@ -7,6 +7,7 @@
 
 #include <linux/fs.h>
 #include <linux/mount.h>
+#include <linux/compat.h>
 
 #define MLOG_MASK_PREFIX ML_INODE
 #include <cluster/masklog.h>
@@ -181,6 +182,10 @@ long ocfs2_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 #ifdef CONFIG_COMPAT
 long ocfs2_compat_ioctl(struct file *file, unsigned cmd, unsigned long arg)
 {
+        bool preserve;
+        struct reflink_arguments args;
+        struct inode *inode = file->f_path.dentry->d_inode;
+
         switch (cmd) {
         case OCFS2_IOC32_GETFLAGS:
                 cmd = OCFS2_IOC_GETFLAGS;
@@ -195,8 +200,15 @@ long ocfs2_compat_ioctl(struct file *file, unsigned cmd, unsigned long arg)
         case OCFS2_IOC_GROUP_EXTEND:
         case OCFS2_IOC_GROUP_ADD:
         case OCFS2_IOC_GROUP_ADD64:
-        case OCFS2_IOC_REFLINK:
                 break;
+        case OCFS2_IOC_REFLINK:
+                if (copy_from_user(&args, (struct reflink_arguments *)arg,
+                                   sizeof(args)))
+                        return -EFAULT;
+                preserve = (args.preserve != 0);
+
+                return ocfs2_reflink_ioctl(inode, compat_ptr(args.old_path),
+                                           compat_ptr(args.new_path), preserve);
         default:
                 return -ENOIOCTLCMD;
         }