I see ocfs2 has a reflink-like call (see ocfs2/ioctl.h)
/* 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)
Its format more closely matches SIS_COPYFILE (which I can experiment
with, but probably works even on cifs not just SMB2/SMB3).
On Thu, Oct 17, 2013 at 5:48 AM, David Disseldorp <ddiss@xxxxxxx> wrote:
> On Wed, 16 Oct 2013 15:02:11 -0500
> Steve French <smfrench@xxxxxxxxx> wrote:
>
>> Do any other file systems other than btrfs support "cp --reflink" (ie
>> BTRFS_IOC_CLONE). I am cleaning the patches to cifs.ko to do this at
>> least for SMB2/SMB2.1/SMB3, but I thought that at the kernel file
>> system summit somebody mentioned other in kernel file systems that
>> support the copy offload ioctl that cp --reflink invokes (ie
>> BTRFS_IOC_CLONE).,
>>
>
> I think OCFS2 does via OCFS2_IOC_REFLINK.
>
> Cheers, David
--
Thanks,
Steve
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