Messages in this thread | | | Date | Sun, 29 Sep 2013 09:14:25 +0200 | Subject | Re: Copy on write hard links? | From | Richard Weinberger <> |
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On Sun, Sep 29, 2013 at 7:22 AM, Pádraig Brady <P@draigbrady.com> wrote: > On 09/25/2013 03:37 PM, richard -rw- weinberger wrote: >> On Wed, Sep 25, 2013 at 4:28 PM, Thomas Meyer <thomas@m3y3r.de> wrote: >>> Am Mittwoch, den 25.09.2013, 08:59 -0500 schrieb Rob Landley: >>>> On 09/24/2013 01:36:56 PM, Thomas Meyer wrote: >>>>> Hi, >>>>> >>>>> Is there such a thing? >>>> >>>> In the kernel's vfs layer? >>> >>> Yes, that would be a nice feature! >> >> You mean reflinks? >> Currently only OCFS2 and btrfs support them. >> Both using a fs specific ioctl(). >> IIRC GNU cp uses the btrfs specific one if the --reflink parameter is used. > > coreutils is waiting for a reflink syscall to materialize > rather than adding new per filesystem support > http://lwn.net/Articles/335380/
Is this the correct link? It's a proposal for a reflink() syscall. But corrently both OCFS2 and btrfs are using ioctl().
Digging into GNU coreutils shows that their cp's clone_file() only supports the btrfs ioctl(). I don't know what the GNU folks big plan is, maybe you know more. :-)
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