ocfs2: Implement compat_ioctl()

We need this to support 32 bit system calls on 64 bit kernels.

Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>

1 files changed, 23 insertions, 0 deletions

diff --git a/fs/ocfs2/ioctl.c b/fs/ocfs2/ioctl.c
index 4768be5f3086..7e59c93751f0 100644
--- a/fs/ocfs2/ioctl.c
+++ b/fs/ocfs2/ioctl.c
@@ -134,3 +134,26 @@ int ocfs2_ioctl(struct inode * inode, struct file * filp,
         }
 }
 
+#ifdef CONFIG_COMPAT
+long ocfs2_compat_ioctl(struct file *file, unsigned cmd, unsigned long arg)
+{
+        struct inode *inode = file->f_path.dentry->d_inode;
+        int ret;
+
+        switch (cmd) {
+        case OCFS2_IOC32_GETFLAGS:
+                cmd = OCFS2_IOC_GETFLAGS;
+                break;
+        case OCFS2_IOC32_SETFLAGS:
+                cmd = OCFS2_IOC_SETFLAGS;
+                break;
+        default:
+                return -ENOIOCTLCMD;
+        }
+
+        lock_kernel();
+        ret = ocfs2_ioctl(inode, file, cmd, arg);
+        unlock_kernel();
+        return ret;
+}
+#endif