[PATCH 1/2] ocfs2: Add group extend for online resize

This patch adds the ability for a userspace program to request an extend of
last cluster group on an Ocfs2 file system. The request is made via ioctl,
OCFS2_IOC_GROUP_EXTEND. This is derived from EXT3_IOC_GROUP_EXTEND, but is
obviously Ocfs2 specific.

tunefs.ocfs2 would call this for an online-resize operation if the last
cluster group isn't full.

Signed-off-by: Tao Ma <tao.ma@oracle.com>
Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/fs/ocfs2/ioctl.c b/fs/ocfs2/ioctl.c
index 67c2fb4bae91..b74b24ecf0e4 100644
--- a/fs/ocfs2/ioctl.c
+++ b/fs/ocfs2/ioctl.c
@@ -20,6 +20,7 @@
 
 #include "ocfs2_fs.h"
 #include "ioctl.h"
+#include "resize.h"
 
 #include <linux/ext2_fs.h>
 
@@ -115,6 +116,7 @@ int ocfs2_ioctl(struct inode * inode, struct file * filp,
         unsigned int cmd, unsigned long arg)
 {
         unsigned int flags;
+        int new_clusters;
         int status;
         struct ocfs2_space_resv sr;
 
@@ -140,6 +142,11 @@ int ocfs2_ioctl(struct inode * inode, struct file * filp,
                         return -EFAULT;
 
                 return ocfs2_change_file_space(filp, cmd, &sr);
+        case OCFS2_IOC_GROUP_EXTEND:
+                if (get_user(new_clusters, (int __user *)arg))
+                        return -EFAULT;
+
+                return ocfs2_group_extend(inode, new_clusters);
         default:
                 return -ENOTTY;
         }
@@ -162,6 +169,7 @@ long ocfs2_compat_ioctl(struct file *file, unsigned cmd, unsigned long arg)
         case OCFS2_IOC_RESVSP64:
         case OCFS2_IOC_UNRESVSP:
         case OCFS2_IOC_UNRESVSP64:
+        case OCFS2_IOC_GROUP_EXTEND:
                 break;
         default:
                 return -ENOIOCTLCMD;