On Fri, 19 May 2023 at 14:57, Amir Goldstein <amir73il@xxxxxxxxx> wrote:
>
> Extend the passthrough feature by handling asynchronous IO both for read
> and write operations.
>
> When an AIO request is received, if the request targets a FUSE file with
> the passthrough functionality enabled, a new identical AIO request is
> created. The new request targets the backing file and gets assigned
> a special FUSE passthrough AIO completion callback.
>
> When the backing file AIO request is completed, the FUSE
> passthrough AIO completion callback is executed and propagates the
> completion signal to the FUSE AIO request by triggering its completion
> callback as well.
Overlayfs added refcounting to the async req (commit 9a2544037600
("ovl: fix use after free in struct ovl_aio_req")). Is that not
needed for fuse as well?
Would it make sense to try and merge the two implementations?
Thanks,
Miklos
