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    SubjectRe: [PATCH 30/32] vfs: Allow cloning of a mount tree with open(O_PATH|O_CLONE_MOUNT) [ver #8]
    On Thu, May 31, 2018 at 11:26:54PM -0700, Christoph Hellwig wrote:
    > On Fri, May 25, 2018 at 01:08:38AM +0100, David Howells wrote:
    > > Make it possible to clone a mount tree with a new pair of open flags that
    > > are used in conjunction with O_PATH:
    > >
    > > (1) O_CLONE_MOUNT - Clone the mount or mount tree at the path.
    > >
    > > (2) O_NON_RECURSIVE - Don't clone recursively.
    >
    > Err. I don't think we should use up two O_* flags for something
    > only useful for your new mount API. Don't we have a better place
    > to for these flags?
    >
    > Instead of overloading this on open having a specific syscalls just
    > seems like a much saner idea.

    It's not just mount API; these can be used independently of that.
    Think of the uses where you pass those to ...at() and you'll see
    a bunch of applications of that thing.

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