Ocfs2/move_extents: move/defrag extents within a certain range.

the basic logic of moving extents for a file is pretty like punching-hole
sequence, walk the extents within the range as user specified, calculating
an appropriate len to defrag/move, then let ocfs2_defrag/move_extent() to
do the actual moving.

This func ends up setting 'OCFS2_MOVE_EXT_FL_COMPLETE' to userpace if operation
gets done successfully.

Signed-off-by: Tristan Ye <tristan.ye@oracle.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/fs/ocfs2/ioctl.c b/fs/ocfs2/ioctl.c
index fd248ed53df7..59100598b0cb 100644
--- a/fs/ocfs2/ioctl.c
+++ b/fs/ocfs2/ioctl.c
@@ -26,6 +26,7 @@
 #include "dir.h"
 #include "buffer_head_io.h"
 #include "suballoc.h"
+#include "move_extents.h"
 
 #include <linux/ext2_fs.h>
 
@@ -951,6 +952,8 @@ long ocfs2_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
                         return -EFAULT;
 
                 return ocfs2_info_handle(inode, &info, 0);
+        case OCFS2_IOC_MOVE_EXT:
+                return ocfs2_ioctl_move_extents(filp, (void __user *)arg);
         default:
                 return -ENOTTY;
         }
@@ -993,6 +996,8 @@ long ocfs2_compat_ioctl(struct file *file, unsigned cmd, unsigned long arg)
                         return -EFAULT;
 
                 return ocfs2_info_handle(inode, &info, 1);
+        case OCFS2_IOC_MOVE_EXT:
+                break;
         default:
                 return -ENOIOCTLCMD;
         }