Re: [PATCH V8 3/3] fuse: Handle AIO read and write in passthrough
From: Alessio Balsini
Date: Mon Sep 21 2020 - 11:28:56 EST
On Fri, Sep 11, 2020 at 11:23:22AM -0600, Jens Axboe wrote:
> On 9/11/20 10:34 AM, Alessio Balsini wrote:
> > Extend the passthrough feature by handling asynchronous IO both for read
> > and write operations.
> > When an AIO request is received, targeting a FUSE file with passthrough
> > functionality enabled, a new identical AIO request is created, the file
> > pointer of which is updated with the file pointer of the lower file system,
> > and the completion handler is set with a special AIO passthrough handler.
> > The lower file system AIO request is allocated in dynamic kernel memory
> > and, when it completes, the allocated memory is freed and the completion
> > signal is propagated to the FUSE AIO request by triggering its completion
> > callback as well.
> > Signed-off-by: Alessio Balsini <balsini@xxxxxxxxxxx>
> > ---
> > fs/fuse/passthrough.c | 66 +++++++++++++++++++++++++++++++++++++++++--
> > 1 file changed, 63 insertions(+), 3 deletions(-)
> > diff --git a/fs/fuse/passthrough.c b/fs/fuse/passthrough.c
> > index 44a78e02f45d..87b57b26fd8a 100644
> > --- a/fs/fuse/passthrough.c
> > +++ b/fs/fuse/passthrough.c
> > @@ -2,10 +2,16 @@
> > #include "fuse_i.h"
> > +#include <linux/aio.h>
> What is this include for? It's not using any aio parts at all.
> Jens Axboe
Slipped from a cleanup. Fixed.