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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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9
fs/ocfs2/ocfs2_fs.h
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@@ -301,6 +301,15 @@ struct ocfs2_new_group_input {
#define OCFS2_IOC_GROUP_ADD _IOW('o', 2,struct ocfs2_new_group_input)
#define OCFS2_IOC_GROUP_ADD64 _IOW('o', 3,struct ocfs2_new_group_input)
/* Used to pass 2 file names to reflink. */
struct reflink_arguments {
__u64 old_path;
__u64 new_path;
__u64 preserve;
};
#define OCFS2_IOC_REFLINK _IOW('o', 4, struct reflink_arguments)
/*
* Journal Flags (ocfs2_dinode.id1.journal1.i_flags)
*/