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SubjectRe: [PATCH bpf-next v3 2/4] libfs: support RENAME_EXCHANGE in simple_rename()
On Thu, 28 Oct 2021 at 11:48, Lorenz Bauer <lmb@cloudflare.com> wrote:
>
> Allow atomic exchange via RENAME_EXCHANGE when using simple_rename.
> This affects binderfs, ramfs, hubetlbfs and bpffs.

Ramfs and hugetlbfs are generic enough; those seem safe.

Binderfs: I have no idea what this does; binderfs_rename() should
probably error out on RENAME_EXCHANGE for now, or an explicit ack from
the maintainers.

Bpffs is your baby...

Thanks,
Miklos

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