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ocfs2: Add ioctl for reflink.

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The ioctl will take 3 parameters: old_path, new_path and
preserve and call vfs_reflink. It is useful when we backport
reflink features to old kernels.

Signed-off-by: Tao Ma <tao.ma@oracle.com>
This commit is contained in:
Tao Ma
2009-09-21 11:25:14 +08:00
committed by Joel Becker
parent 64871b8d62
commit bd50873dc7
4 changed files with 193 additions and 0 deletions
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14
fs/ocfs2/ioctl.c
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@ -22,6 +22,7 @@
#include "ocfs2_fs.h"
#include "ioctl.h"
#include "resize.h"
#include "refcounttree.h"
#include <linux/ext2_fs.h>
@ -116,6 +117,9 @@ long ocfs2_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
int status;
struct ocfs2_space_resv sr;
struct ocfs2_new_group_input input;
struct reflink_arguments args;
const char *old_path, *new_path;
bool preserve;
switch (cmd) {
case OCFS2_IOC_GETFLAGS:
@ -161,6 +165,15 @@ long ocfs2_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
return -EFAULT;
return ocfs2_group_add(inode, &input);
case OCFS2_IOC_REFLINK:
if (copy_from_user(&args, (struct reflink_arguments *)arg,
sizeof(args)))
return -EFAULT;
old_path = (const char *)(unsigned long)args.old_path;
new_path = (const char *)(unsigned long)args.new_path;
preserve = (args.preserve != 0);
return ocfs2_reflink_ioctl(inode, old_path, new_path, preserve);
default:
return -ENOTTY;
}
@ -183,6 +196,7 @@ 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;
default:
return -ENOIOCTLCMD;