On Fri, Mar 3, 2023 at 8:26 PM Bernd Schubert
<bernd.schubert@xxxxxxxxxxx> wrote:
>
>
>
> On 2/20/23 20:37, Alexander Mikhalitsyn wrote:
> > This ioctl aborts fuse connection and then reinitializes it,
> > sends FUSE_INIT request to allow a new userspace daemon
> > to pick up the fuse connection.
> >
> > Cc: Miklos Szeredi <mszeredi@xxxxxxxxxx>
> > Cc: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
> > Cc: Amir Goldstein <amir73il@xxxxxxxxx>
> > Cc: Stéphane Graber <stgraber@xxxxxxxxxx>
> > Cc: Seth Forshee <sforshee@xxxxxxxxxx>
> > Cc: Christian Brauner <brauner@xxxxxxxxxx>
> > Cc: Andrei Vagin <avagin@xxxxxxxxx>
> > Cc: Pavel Tikhomirov <ptikhomirov@xxxxxxxxxxxxx>
> > Cc: linux-fsdevel@xxxxxxxxxxxxxxx
> > Cc: linux-kernel@xxxxxxxxxxxxxxx
> > Cc: criu@xxxxxxxxxx
> > Signed-off-by: Alexander Mikhalitsyn <aleksandr.mikhalitsyn@xxxxxxxxxxxxx>
> > ---
> > fs/fuse/dev.c | 132 ++++++++++++++++++++++++++++++++++++++
> > include/uapi/linux/fuse.h | 1 +
> > 2 files changed, 133 insertions(+)
> >
> > diff --git a/fs/fuse/dev.c b/fs/fuse/dev.c
> > index 737764c2295e..0f53ffd63957 100644
> > --- a/fs/fuse/dev.c
> > +++ b/fs/fuse/dev.c
> > @@ -2187,6 +2187,112 @@ void fuse_abort_conn(struct fuse_conn *fc)
> > }
> > EXPORT_SYMBOL_GPL(fuse_abort_conn);
> >
> > +static int fuse_reinit_conn(struct fuse_conn *fc)
> > +{
> > + struct fuse_iqueue *fiq = &fc->iq;
> > + struct fuse_dev *fud;
> > + unsigned int i;
> > +
> > + if (fc->conn_gen + 1 < fc->conn_gen)
> > + return -EOVERFLOW;
> > +
> > + fuse_abort_conn(fc);
> > + fuse_wait_aborted(fc);
>
> Shouldn't this also try to flush all data first?
I think we should. Thanks for pointing to that!
I've read all your comments and I'll prepare -v2 series soon.
Thanks a lot, Bernd!
>
