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

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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>
This commit is contained in:
Tristan Ye
2011-05-25 14:23:43 +08:00
parent ee16cc037e
commit 53069d4e76
3 changed files with 315 additions and 0 deletions
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5
fs/ocfs2/ioctl.c
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@@ -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;
}